ExternalizableHelper (Coherence API)

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Coherence^TM v3.3
Copyright^© 2000-2007 by Oracle Corporation

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com.tangosol.util
Class ExternalizableHelper

java.lang.Object
  BitHelper
      com.tangosol.util.ExternalizableHelper

Direct Known Subclasses:: ExternalizableHelper.IntDecoratedObject

public abstract class ExternalizableHelper
extends BitHelper
extends BitHelper

Helpers for the Serializable, Externalizable and the ExternalizableLite interface.

Note: This class is configured via the ExternalizableHelper.xml document located in the same package as the class. The location of the configuration file can be overridden using the tangosol.externalizable.config system property.

Author:: cp 2003.03.28

Nested Class Summary
`protected static class`	`ExternalizableHelper.IntDecoratedObject` Integer decorated object.
`static interface`	`ExternalizableHelper.Shielded` Marker interface.
`static class`	`ExternalizableHelper.ShieldedDataOutputStream` An OutputStream that implements DataOutput that delegates all operations other than flush and close to an underlying object that implements DataOutput.
`static class`	`ExternalizableHelper.ShieldedInputStream` An InputStream that delegates all operations other than close to an underlying InputStream.
`static class`	`ExternalizableHelper.ShieldedObjectOutputStream` An OutputStream that implements ObjectOutput that delegates all operations other than flush and close to an underlying object that implements ObjectOutput.
`static class`	`ExternalizableHelper.ShieldedOutputStream` An OutputStream that delegates all operations other than flush and close to an underlying OutputStream.
`static class`	`ExternalizableHelper.SimpleXmlBeanClassCache` An implementation XmlBeanClassCache that uses a pre-defined list of XmlBean implementations.
`static interface`	`ExternalizableHelper.XmlBeanClassCache` An interface for caching class reference by integer ID values.

Field Summary
`static Converter`	`CONVERTER_FROM_BINARY` Standard converter from Binary to Object format, which uses the context ClassLoader.
`static Converter`	`CONVERTER_TO_BINARY` Standard converter from Object to Binary format.
`static int`	`DECO_CUSTOM` Decoration: A client specific value (opaque).
`static int`	`DECO_EXPIRY` Decoration: The expiry for the value.
`static int`	`DECO_ID_MAX` Decoration range: The maximum decoration identifier.
`static int`	`DECO_ID_MIN` Decoration range: The minimum decoration identifier.
`static int`	`DECO_STORE` Decoration: The persistent state for the value.
`static int`	`DECO_VALUE` Decoration: The original value (before being decorated).
`protected static int`	`FMT_B_ARRAY` Serialization format: Byte array value.
`protected static int`	`FMT_BIN_DECO` Serialization format: Decorated Binary value.
`protected static int`	`FMT_BINARY` Serialization format: Binary value.
`protected static int`	`FMT_BOOLEAN` Serialization format: Boolean value.
`protected static int`	`FMT_BYTE` Serialization format: Byte value.
`protected static int`	`FMT_DECIMAL` Serialization format: BigDecimal value.
`protected static int`	`FMT_DOUBLE` Serialization format: Double value.
`protected static int`	`FMT_FLOAT` Serialization format: Float value.
`protected static int`	`FMT_IDO` Serialization format: Integer-decorated value.
`protected static int`	`FMT_INT` Serialization format: Integer value.
`protected static int`	`FMT_INTEGER` Serialization format: BigInteger value.
`protected static int`	`FMT_LONG` Serialization format: Long value.
`protected static int`	`FMT_NONE` Serialization format: Unknown value.
`protected static int`	`FMT_NULL` Serialization format: Null value.
`protected static int`	`FMT_OBJ_EXT` Serialization format: ExternalizableLite value.
`protected static int`	`FMT_OBJ_SER` Serialization format: Serializable value.
`protected static int`	`FMT_SHORT` Serialization format: Short value.
`protected static int`	`FMT_STRING` Serialization format: String value.
`protected static int`	`FMT_XML_BEAN` Serialization format: XmlBean value.
`protected static int`	`FMT_XML_SER` Serialization format: XmlSerializable value.
`static boolean`	`FORCE_RESOLVING_STREAMS` Option: Always use a ResolvingObjectInputStream, even if a regular ObjectInputStream is available.
`static String`	`PROPERTY_CONFIG` The name of the system property that can be used to override the location of the ExternalizableHelper configuration file.
`static int`	`STATS_THRESHOLD` Option: Size of user type objects above which sizing stats are maintained.
`static int`	`TRINT_DOMAIN_SPAN` Trints use 6 hexits (3 bytes), so the trint domain span is 0x01000000.
`static int`	`TRINT_MAX_VALUE` Trints use 6 hexits (3 bytes), so the trint maximum is 0x00FFFFFF.
`static int`	`TRINT_MAX_VARIANCE` Trints use 6 hexits (3 bytes), so the trint maximum variance (from a "current" value) is half the trint domain span, or 0x00800000.
`static boolean`	`USE_MARSHAL_STREAMS` Option: Use marshalling object streams that can read classes over the network.
`static boolean`	`USE_POF_STREAMS` Option: Use POF as the default serialization format.
`static boolean`	`USE_XMLBEAN_CLASS_CACHE` Option: Use an XmlBean class cache.
`static ExternalizableHelper.XmlBeanClassCache`	`XMLBEAN_CLASS_CACHE` Option: XmlBean class cache implementation.

Constructor Summary
`ExternalizableHelper()`

Method Summary
`static String`	`convertUTF(byte[] ab, int of, int cb, char[] ach)` Convert binary UTF-8 encode data to a String.
`static Binary`	`decorate(Binary bin, Binary[] abinDecorations)` If the passed Binary is decorated, add the passed decorations and return the resulting new Binary; otherwise, create a decorated version of the passed Binary containing the passed decorations and return the resulting new Binary.
`static Binary`	`decorate(Binary bin, int nId, Binary binDecoration)` If the passed Binary is decorated, add the passed decoration and return the resulting new Binary; otherwise, create a decorated version of the passed Binary containing the passed decoration and return the resulting new Binary.
`static ExternalizableHelper.IntDecoratedObject`	`decorate(Object oValue, int nDecoration)` Decorate the specified value with the specified integer decoration.
`static Serializer`	`ensureSerializer(ClassLoader loader)` Obtain a Serializer for the specified ClassLoader.
`static int`	`extractIntDecoration(ReadBuffer buffer)` Extract a decoration value from a specified ReadBuffer that contains a binary representation of an IntDecoratedObject.
`static Object`	`fromBinary(Binary bin)` Read an object from a Binary object.
`static Object`	`fromBinary(Binary bin, ClassLoader loader)` Read an object from a Binary object.
`static Object`	`fromByteArray(byte[] ab)` Read an object from a byte array.
`static Object`	`fromByteArray(byte[] ab, ClassLoader loader)` Read an object from a byte array.
`static Binary`	`getDecoration(Binary bin, int nId)` If the passed Binary is decorated, check for and return (if it exists) the decoration for the specified identifier.
`static Binary[]`	`getDecorations(Binary bin)` If the passed Binary is decorated, return an array containing all of its decorations.
`static InputStream`	`getInputStream(DataInput in)` Get an InputStream for the passed DataInput object.
`static ObjectInput`	`getNewObjectInput(DataInput in, ClassLoader loader)` Get a new ObjectInput for the passed DataInput, even if the passed DataInput is an ObjectInput.
`static ObjectInput`	`getObjectInput(DataInput in, ClassLoader loader)` Get an ObjectInput for the passed DataInput object.
`static ObjectInput`	`getObjectInput(InputStream in, ClassLoader loader)` Get an ObjectInput for the passed InputStream object.
`static ObjectOutput`	`getObjectOutput(DataOutput out)` Get an ObjectOutput for the passed DataOutput object.
`static ObjectOutput`	`getObjectOutput(OutputStream out)` Get an ObjectOutput for the passed OutputStream object.
`static OutputStream`	`getOutputStream(DataOutput out)` Get an OutputStream for the passed DataOutput object.
`static OutputStream`	`getShieldedOutputStream(OutputStream out)` Get a shielded OutputStream for the passed OutputStream object.
`protected static int`	`getStreamFormat(Object o)` Internal: Select an optimal stream format to use to store the passed object in a stream.
`static Binary`	`getUndecorated(Binary bin)` If the passed Binary is decorated, extract the original Binary value that the decorations were added to, otherwise return the passed Binary value.
`protected static WriteBuffer`	`internalWriteObject(Object o, boolean fBinary)` Serialize the passed object into a buffer created for that purpose.
`static boolean`	`isClassLoaderDependent(Object o)` Determine if the resource object may depend on a specific class loader.
`static boolean`	`isDecorated(Binary bin)` If the Binary is the result of serialization by ExternalizableHelper, determine if the Binary contains decorations.
`static boolean`	`isIntDecorated(ReadBuffer buffer)` Check whether or not the specified ReadBuffer contains a binary representation of an IntDecoratedObject.
`static boolean`	`isMarshalled(DataOutput out)` Determine whether the passed DataOutput handles marshalling of ObjectOutput.
`static boolean`	`isResolving(DataOutput out)` Determine whether the passed DataOutput handles ClassLoader resolving.
`static boolean`	`isSerializable(Object o)` Determine if the resource object can be serialized using the custom stream format support.
`static Class`	`loadClass(String sClass, ClassLoader loader1, ClassLoader loader2)` Attempt to load the specified class using sequentionally all of the specified loaders, the ContextClassLoader and the current class loader.
`static URL`	`loadResource(String sName, ClassLoader loader1, ClassLoader loader2)` Attempt to find a valid, resolvable URL for the specified resource, first by using each of the specified ClassLoaders, then using the ContextClassLoader.
`static void`	`main(String[] asArgs)` Parse a hex string representing a serialialized object.
`static int`	`makeTrint(long l)` Convert a long integer to a trint.
`static BigDecimal`	`readBigDecimal(DataInput in)` Read a BigDecimal from a DataInput stream.
`static BigInteger`	`readBigInteger(DataInput in)` Read a BigInteger from a DataInput stream.
`static boolean[]`	`readBooleanArray(DataInput in)` Read a packed boolean array.
`static byte[]`	`readByteArray(DataInput in)` Read a variable-length encoded byte array.
`static int`	`readCollection(DataInput in, Collection collection, ClassLoader loader)` Read collection content from a DataInput stream and update the specified collection.
`static Date`	`readDate(DataInput in)` Read a Date from a DataInput stream.
`static double[]`	`readDoubleArray(DataInput in)` Read an array of double numbers from a DataInput stream.
`static ExternalizableLite`	`readExternalizableLite(DataInput in)` Read an ExternalizableLite object from a DataInput stream.
`static ExternalizableLite`	`readExternalizableLite(DataInput in, ClassLoader loader)` Read an ExternalizableLite object from a DataInput stream.
`static float[]`	`readFloatArray(DataInput in)` Read an array of float numbers from a DataInput stream.
`static int`	`readInt(DataInput in)` Read an int that uses variable length storage in the stream.
`static long`	`readLong(DataInput in)` Read a long that uses variable length storage in the stream.
`static int`	`readMap(DataInput in, Map map, ClassLoader loader)` Read map content from a DataInput stream and update the specified map.
`static int`	`readMap(DataInput in, Map map, int cBlock, ClassLoader loader)` Read map content from a DataInput stream and update the specified map using the "putAll" method.
`static Object`	`readObject(DataInput in)` Read an Object from the passed DataInput object.
`static Object`	`readObject(DataInput in, ClassLoader loader)` Read an Object from the passed DataInput object.
`static String`	`readSafeUTF(DataInput in)` Read a variable-length encoded UTF packed String.
`static Serializable`	`readSerializable(DataInput in)` Read a Serializable object from a DataInput stream.
`static Serializable`	`readSerializable(DataInput in, ClassLoader loader)` Read a Serializable object from a DataInput stream.
`static String[]`	`readStringArray(DataInput in)` Read a String array.
`static Time`	`readTime(DataInput in)` Read a Time from a DataInput stream.
`static Timestamp`	`readTimestamp(DataInput in)` Read a Timestamp from a DataInput stream.
`static int`	`readTrint(DataInput in)` Read a signed three-byte integer value from a stream.
`static int`	`readUnsignedTrint(DataInput in)` Read an unsigned three-byte integer value from a stream.
`static String`	`readUTF(DataInput in)` Read a variable-length encoded UTF packed String.
`static XmlBean`	`readXmlBean(DataInput in, ClassLoader loader)` Read an XmlBean object from a DataInput stream.
`static XmlSerializable`	`readXmlSerializable(DataInput in)` Read an XmlSerializable object from a DataInput stream.
`static XmlSerializable`	`readXmlSerializable(DataInput in, ClassLoader loader)` Read an XmlSerializable object from a DataInput stream.
`static ClassLoader`	`resolveLoader(ClassLoader loader)` Return the passed ClassLoader if one is passed; otherwise return the ContextClassLoader.
`static Binary`	`toBinary(Object o)` Write an object into a Binary object.
`static byte[]`	`toByteArray(Object o)` Write an object to a byte array.
`static long`	`translateTrint(int nTrint, long lCurrent)` Convert a three-byte unsigned integer ("trint") to a long value.
`static Binary`	`undecorate(Binary bin, int nId)` If the passed Binary is decorated, check for a decoration with the passed identify and remove it.
`static void`	`writeBigDecimal(DataOutput out, BigDecimal dec)` Write a BigDecimal to a DataOutput stream.
`static void`	`writeBigInteger(DataOutput out, BigInteger bigint)` Write a BigInteger to a DataOutput stream.
`static void`	`writeBooleanArray(DataOutput out, boolean[] af)` Write a packed boolean array.
`static void`	`writeByteArray(DataOutput out, byte[] ab)` Write a variable-length encoded byte array.
`static void`	`writeCollection(DataOutput out, Collection collection)` Write collection content to a DataOutput stream.
`static void`	`writeDate(DataOutput out, Date date)` Write a Date to a DataOutput stream.
`static void`	`writeDoubleArray(DataOutput out, double[] ad)` Write an array of double numbers to a DataOutput stream.
`static void`	`writeExternalizableLite(DataOutput out, ExternalizableLite o)` Write an ExternalizableLite object to a DataOutput stream.
`static void`	`writeFloatArray(DataOutput out, float[] afl)` Write an array of float numbers to a DataOutput stream.
`static void`	`writeInt(DataOutput out, int n)` Write an int to a stream using a variable length of storage.
`static void`	`writeLong(DataOutput out, long l)` Write a long to a stream using a variable length of storage.
`static void`	`writeMap(DataOutput out, Map map)` Write map content to a DataOutput stream.
`static void`	`writeObject(DataOutput out, Object o)` Write the specified data to the passed DataOutput object.
`static void`	`writeSafeUTF(DataOutput out, String s)` Write a variable-length encoded UTF packed String.
`static void`	`writeSerializable(DataOutput out, Serializable o)` Write a Serializable object to a DataOutput stream.
`static void`	`writeStringArray(DataOutput out, String[] as)` Write a String array.
`static void`	`writeTime(DataOutput out, Time time)` Write a Time to a DataOutput stream.
`static void`	`writeTimestamp(DataOutput out, Timestamp dt)` Write a Timestamp to a DataOutput stream.
`static void`	`writeTrint(DataOutput out, int n)` Write a three-byte integer value to a stream.
`static void`	`writeTrint(DataOutput out, long l)` Write a three-byte integer value to a stream.
`static void`	`writeUTF(DataOutput out, String s)` Write a variable-length encoded UTF packed String.
`static void`	`writeXmlBean(DataOutput out, XmlBean bean)` Write an XmlBean object to a DataOutput stream.
`static void`	`writeXmlSerializable(DataOutput out, XmlSerializable o)` Write an XmlSerializable object to a DataOutput stream.

Field Detail

FMT_NONE

protected static final int FMT_NONE

Serialization format: Unknown value.

See Also:: Constant Field Values

FMT_NULL

protected static final int FMT_NULL

Serialization format: Null value.

See Also:: Constant Field Values

FMT_INT

protected static final int FMT_INT

Serialization format: Integer value.

See Also:: Constant Field Values

FMT_LONG

protected static final int FMT_LONG

Serialization format: Long value.

See Also:: Constant Field Values

FMT_DOUBLE

protected static final int FMT_DOUBLE

Serialization format: Double value.

See Also:: Constant Field Values

FMT_INTEGER

protected static final int FMT_INTEGER

Serialization format: BigInteger value.

See Also:: Constant Field Values

FMT_DECIMAL

protected static final int FMT_DECIMAL

Serialization format: BigDecimal value.

See Also:: Constant Field Values

FMT_STRING

protected static final int FMT_STRING

Serialization format: String value.

See Also:: Constant Field Values

FMT_BINARY

protected static final int FMT_BINARY

Serialization format: Binary value.

See Also:: Constant Field Values

FMT_B_ARRAY

protected static final int FMT_B_ARRAY

Serialization format: Byte array value.

See Also:: Constant Field Values

FMT_XML_SER

protected static final int FMT_XML_SER

Serialization format: XmlSerializable value.

See Also:: Constant Field Values

FMT_OBJ_EXT

protected static final int FMT_OBJ_EXT

Serialization format: ExternalizableLite value.

See Also:: Constant Field Values

FMT_OBJ_SER

protected static final int FMT_OBJ_SER

Serialization format: Serializable value.

See Also:: Constant Field Values

FMT_XML_BEAN

protected static final int FMT_XML_BEAN

Serialization format: XmlBean value.

See Also:: Constant Field Values

FMT_IDO

protected static final int FMT_IDO

Serialization format: Integer-decorated value.

See Also:: Constant Field Values

FMT_FLOAT

protected static final int FMT_FLOAT

Serialization format: Float value.

See Also:: Constant Field Values

FMT_SHORT

protected static final int FMT_SHORT

Serialization format: Short value.

See Also:: Constant Field Values

FMT_BYTE

protected static final int FMT_BYTE

Serialization format: Byte value.

See Also:: Constant Field Values

FMT_BOOLEAN

protected static final int FMT_BOOLEAN

Serialization format: Boolean value.

See Also:: Constant Field Values

FMT_BIN_DECO

protected static final int FMT_BIN_DECO

Serialization format: Decorated Binary value.

Structure is: byte 1 : format identifier (18) byte 2 : bit mask of decoration identifiers (see DECO_* enums) byte 3 : packed int specifying the length of the first decorator byte next : binary data ... For each decorator, there is a packed int for its length, followed by its binary data. The first decorator is the decorated value itself, if present.

See Also:: Constant Field Values

DECO_ID_MIN

public static final int DECO_ID_MIN

Decoration range: The minimum decoration identifier.

See Also:: Constant Field Values

DECO_ID_MAX

public static final int DECO_ID_MAX

Decoration range: The maximum decoration identifier.

See Also:: Constant Field Values

DECO_VALUE

public static final int DECO_VALUE

Decoration: The original value (before being decorated).

See Also:: Constant Field Values

DECO_EXPIRY

public static final int DECO_EXPIRY

Decoration: The expiry for the value.

See Also:: Constant Field Values

DECO_STORE

public static final int DECO_STORE

Decoration: The persistent state for the value.

See Also:: Constant Field Values

DECO_CUSTOM

public static final int DECO_CUSTOM

Decoration: A client specific value (opaque).

See Also:: Constant Field Values

TRINT_DOMAIN_SPAN

public static final int TRINT_DOMAIN_SPAN

Trints use 6 hexits (3 bytes), so the trint domain span is 0x01000000.

See Also:: Constant Field Values

TRINT_MAX_VALUE

public static final int TRINT_MAX_VALUE

Trints use 6 hexits (3 bytes), so the trint maximum is 0x00FFFFFF.

See Also:: Constant Field Values

TRINT_MAX_VARIANCE

public static final int TRINT_MAX_VARIANCE

Trints use 6 hexits (3 bytes), so the trint maximum variance (from a "current" value) is half the trint domain span, or 0x00800000.

See Also:: Constant Field Values

CONVERTER_TO_BINARY

public static final Converter CONVERTER_TO_BINARY

Standard converter from Object to Binary format.

Since:: Coherence 2.4

CONVERTER_FROM_BINARY

public static final Converter CONVERTER_FROM_BINARY

Standard converter from Binary to Object format, which uses the context ClassLoader.

Since:: Coherence 2.4
See Also:: Base.getContextClassLoader()

PROPERTY_CONFIG

public static final String PROPERTY_CONFIG

The name of the system property that can be used to override the location of the ExternalizableHelper configuration file.

The value of this property must be the name of a resource that contains an XML document with the structure defined in the /com/tangosol/util/ExternalizableHelper.xml configuration descriptor.

See Also:: Constant Field Values

FORCE_RESOLVING_STREAMS

public static final boolean FORCE_RESOLVING_STREAMS

Option: Always use a ResolvingObjectInputStream, even if a regular ObjectInputStream is available.

USE_MARSHAL_STREAMS

public static final boolean USE_MARSHAL_STREAMS

Option: Use marshalling object streams that can read classes over the network.

USE_XMLBEAN_CLASS_CACHE

public static final boolean USE_XMLBEAN_CLASS_CACHE

Option: Use an XmlBean class cache.

XMLBEAN_CLASS_CACHE

public static final ExternalizableHelper.XmlBeanClassCache XMLBEAN_CLASS_CACHE

Option: XmlBean class cache implementation.

STATS_THRESHOLD

public static final int STATS_THRESHOLD

Option: Size of user type objects above which sizing stats are maintained.

USE_POF_STREAMS

public static final boolean USE_POF_STREAMS

Option: Use POF as the default serialization format.

Constructor Detail

ExternalizableHelper

public ExternalizableHelper()

Method Detail

toByteArray

public static byte[] toByteArray(Object o)

Write an object to a byte array.

Parameters:: o - the object to write into a byte array
Returns:: a byte array containing the serialized form of the passed object
Throws:: WrapperException - may contain an IOException

fromByteArray

public static Object fromByteArray(byte[] ab)

Read an object from a byte array.

Parameters:: ab - the byte array containing the object
Returns:: the object deserialized from the byte array
Throws:: WrapperException - may contain an IOException

fromByteArray

public static Object fromByteArray(byte[] ab,
                                   ClassLoader loader)

Read an object from a byte array.

Parameters:: ab - the byte array containing the object; loader - the ClassLoader to use
Returns:: the object deserialized from the byte array
Throws:: WrapperException - may contain an IOException

toBinary

public static Binary toBinary(Object o)

Write an object into a Binary object.

Parameters:: o - the object to write into a Binary object
Returns:: a Binary object containing a serialized form of the passed object
Throws:: WrapperException - may contain an IOException

fromBinary

public static Object fromBinary(Binary bin)

Read an object from a Binary object.

Parameters:: bin - the Binary object containing the serialized object
Returns:: the object deserialized from the Binary object
Throws:: WrapperException - may contain an IOException

fromBinary

public static Object fromBinary(Binary bin,
                                ClassLoader loader)

Read an object from a Binary object.

Parameters:: bin - the Binary object containing the serialized object; loader - the ClassLoader to use
Returns:: the object deserialized from the Binary object
Throws:: WrapperException - may contain an IOException

ensureSerializer

public static Serializer ensureSerializer(ClassLoader loader)

Obtain a Serializer for the specified ClassLoader. This method is intended to provide configurable indirection for the serialization of application objects.

Parameters:: loader - a ClassLoader
Returns:: the Serializer to use with the specified ClassLoader

readTrint

public static int readTrint(DataInput in)
                     throws IOException

Read a signed three-byte integer value from a stream.

Parameters:: in - DataInput stream to read from
Returns:: a three-byte signed integer value as an int
Throws:: IOException

readUnsignedTrint

public static int readUnsignedTrint(DataInput in)
                             throws IOException

Read an unsigned three-byte integer value from a stream.

Parameters:: in - DataInput stream to read from
Returns:: a three-byte unsigned integer value as an int
Throws:: IOException

writeTrint

public static void writeTrint(DataOutput out,
                              int n)
                       throws IOException

Write a three-byte integer value to a stream.

Parameters:: out - DataOutput stream to write to; n - a three-byte integer value passed as an int
Throws:: IOException

writeTrint

public static void writeTrint(DataOutput out,
                              long l)
                       throws IOException

Write a three-byte integer value to a stream.

Parameters:: out - DataOutput stream to write to; l - a three-byte integer value passed as an long
Throws:: IOException

makeTrint

public static int makeTrint(long l)

Convert a long integer to a trint.

Parameters:: l - the long value to convert to a trint
Returns:: the equivalent unsigned 3-byte integer value (a "trint")

translateTrint

public static long translateTrint(int nTrint,
                                  long lCurrent)

Convert a three-byte unsigned integer ("trint") to a long value. This guesses what the long value should be based on its proximity to the passed "current" long value.

Parameters:: nTrint - the unsigned 3-byte integer value (a "trint"); lCurrent - the signed 8-byte integer value that the trint will be translated based on ("close to")
Returns:: the long value represented by the trint

readInt

public static int readInt(DataInput in)
                   throws IOException

Read an int that uses variable length storage in the stream.

Parameters:: in - a DataInput stream to read from
Returns:: an int value
Throws:: IOException - if an I/O exception occurs

writeInt

public static void writeInt(DataOutput out,
                            int n)
                     throws IOException

Write an int to a stream using a variable length of storage.

Parameters:: out - a DataOutput stream to write to; n - an int value to write
Throws:: IOException - if an I/O exception occurs

readLong

public static long readLong(DataInput in)
                     throws IOException

Read a long that uses variable length storage in the stream.

Parameters:: in - a DataInput stream to read from
Returns:: a long value
Throws:: IOException - if an I/O exception occurs

writeLong

public static void writeLong(DataOutput out,
                             long l)
                      throws IOException

Write a long to a stream using a variable length of storage.

Parameters:: out - a DataOutput stream to write to; l - a long value to write
Throws:: IOException - if an I/O exception occurs

readBooleanArray

public static boolean[] readBooleanArray(DataInput in)
                                  throws IOException

Read a packed boolean array.

Parameters:: in - a DataInput stream to read from
Returns:: a boolean array value
Throws:: IOException - if an I/O exception occurs

writeBooleanArray

public static void writeBooleanArray(DataOutput out,
                                     boolean[] af)
                              throws IOException

Write a packed boolean array.

Parameters:: out - a DataOutput stream to write to; af - a boolean array value to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readByteArray

public static byte[] readByteArray(DataInput in)
                            throws IOException

Read a variable-length encoded byte array.

Parameters:: in - a DataInput stream to read from
Returns:: a byte array value
Throws:: IOException - if an I/O exception occurs

writeByteArray

public static void writeByteArray(DataOutput out,
                                  byte[] ab)
                           throws IOException

Write a variable-length encoded byte array.

Parameters:: out - a DataOutput stream to write to; ab - a byte array value to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readUTF

public static String readUTF(DataInput in)
                      throws IOException

Read a variable-length encoded UTF packed String. The major difference between this implementation and DataInputStream is that this is not limited to 64KB String values.

Note: This format changed in Coherence 3.0; previously the leading integer value was the number of characters, and currently it is the number of bytes as per the java.io package implementations.

Parameters:: in - a DataInput stream to read from
Returns:: a String value
Throws:: IOException - if an I/O exception occurs

convertUTF

public static String convertUTF(byte[] ab,
                                int of,
                                int cb,
                                char[] ach)
                         throws UTFDataFormatException

Convert binary UTF-8 encode data to a String. This method is a helper to allow various I/O implementations to share a single, efficient implementation.

Parameters:: ab - an array of bytes containing UTF-8 encoded characters; of - the offset into the array of the UTF-8 data to decode; cb - the binary length in the array of the UTF-8 data to decode; ach - a temp char array large enough to convert the UTF into
Returns:: a String value
Throws:: UTFDataFormatException - if the UTF data is corrupt

writeUTF

public static void writeUTF(DataOutput out,
                            String s)
                     throws IOException

Write a variable-length encoded UTF packed String. The major difference between this implementation and DataOutput stream is that this is not limited to 64KB String values.

Note: This format changed in Coherence 3.0; previously the leading integer value was the number of characters, and currently it is the number of bytes as per the java.io package implementations.

Parameters:: out - a DataOutput stream to write to; s - a String value to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readSafeUTF

public static String readSafeUTF(DataInput in)
                          throws IOException

Read a variable-length encoded UTF packed String. The major difference between this implementation and DataInputStream is that this is not limited to 64KB String values and allows null value.

Note: This format changed in Coherence 3.0; previously the leading integer value was the number of characters, and currently it is the number of bytes as per the java.io package implementations.

Parameters:: in - a DataInput stream to read from
Returns:: a String value (could be null)
Throws:: IOException - if an I/O exception occurs

writeSafeUTF

public static void writeSafeUTF(DataOutput out,
                                String s)
                         throws IOException

Write a variable-length encoded UTF packed String. The major difference between this implementation and DataOutput stream is that this is not limited to 64KB String values and allows null value.

Note: This format changed in Coherence 3.0; previously the leading integer value was the number of characters, and currently it is the number of bytes as per the java.io package implementations.

Parameters:: out - a DataOutput stream to write to; s - a String value to write (could be null)
Throws:: IOException - if an I/O exception occurs

readStringArray

public static String[] readStringArray(DataInput in)
                                throws IOException

Read a String array.

Parameters:: in - a DataInput stream to read from
Returns:: a String array value
Throws:: IOException - if an I/O exception occurs

writeStringArray

public static void writeStringArray(DataOutput out,
                                    String[] as)
                             throws IOException

Write a String array.

Parameters:: out - a DataOutput stream to write to; as - a String array to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readBigInteger

public static BigInteger readBigInteger(DataInput in)
                                 throws IOException

Read a BigInteger from a DataInput stream.

Parameters:: in - a DataInput stream to read from
Returns:: a BigInteger value
Throws:: IOException - if an I/O exception occurs

writeBigInteger

public static void writeBigInteger(DataOutput out,
                                   BigInteger bigint)
                            throws IOException

Write a BigInteger to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; bigint - a BigInteger value to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readBigDecimal

public static BigDecimal readBigDecimal(DataInput in)
                                 throws IOException

Read a BigDecimal from a DataInput stream.

Parameters:: in - a DataInput stream to read from
Returns:: a BigDecimal value
Throws:: IOException - if an I/O exception occurs

writeBigDecimal

public static void writeBigDecimal(DataOutput out,
                                   BigDecimal dec)
                            throws IOException

Write a BigDecimal to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; dec - a BigDecimal value to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readDate

public static Date readDate(DataInput in)
                     throws IOException

Read a Date from a DataInput stream.

Parameters:: in - a DataInput stream to read from
Returns:: a Date value
Throws:: IOException - if an I/O exception occurs

writeDate

public static void writeDate(DataOutput out,
                             Date date)
                      throws IOException

Write a Date to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; date - a Date value to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readTime

public static Time readTime(DataInput in)
                     throws IOException

Read a Time from a DataInput stream.

Parameters:: in - a DataInput stream to read from
Returns:: a Time value
Throws:: IOException - if an I/O exception occurs

writeTime

public static void writeTime(DataOutput out,
                             Time time)
                      throws IOException

Write a Time to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; time - a Time value to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readTimestamp

public static Timestamp readTimestamp(DataInput in)
                               throws IOException

Read a Timestamp from a DataInput stream.

Parameters:: in - a DataInput stream to read from
Returns:: a Timestamp value
Throws:: IOException - if an I/O exception occurs

writeTimestamp

public static void writeTimestamp(DataOutput out,
                                  Timestamp dt)
                           throws IOException

Write a Timestamp to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; dt - a Timestamp value to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readFloatArray

public static float[] readFloatArray(DataInput in)
                              throws IOException

Read an array of float numbers from a DataInput stream.

Parameters:: in - a DataInput stream to read from
Returns:: an array of floats
Throws:: IOException - if an I/O exception occurs

writeFloatArray

public static void writeFloatArray(DataOutput out,
                                   float[] afl)
                            throws IOException

Write an array of float numbers to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; afl - an array of floats to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readDoubleArray

public static double[] readDoubleArray(DataInput in)
                                throws IOException

Read an array of double numbers from a DataInput stream.

Parameters:: in - a DataInput stream to read from
Returns:: an array of doubles
Throws:: IOException - if an I/O exception occurs

writeDoubleArray

public static void writeDoubleArray(DataOutput out,
                                    double[] ad)
                             throws IOException

Write an array of double numbers to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; ad - an array of doubles to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readMap

public static int readMap(DataInput in,
                          Map map,
                          ClassLoader loader)
                   throws IOException

Read map content from a DataInput stream and update the specified map.

This method reads entries from the stream and "puts" them into the specified map one-by-one using the "put" method.

Parameters:: in - a DataInput stream to read from; map - a map to add the entries into; loader - the ClassLoader to use
Returns:: the number of read and inserted entries
Throws:: IOException - if an I/O exception occurs
See Also:: readMap(DataInput, Map, int, ClassLoader)

readMap

public static int readMap(DataInput in,
                          Map map,
                          int cBlock,
                          ClassLoader loader)
                   throws IOException

Read map content from a DataInput stream and update the specified map using the "putAll" method.

While the method readMap(DataInput, Map, ClassLoader) reads entries from the stream and "puts" them into the specified map one-by-one, this method collects up to the "block" number of entries into a temporary map and then updates the passed in map using the "putAll" method.

Parameters:: in - a DataInput stream to read from; map - a map to add the entries into; cBlock - the maximum number of entries to read at once; loader - the ClassLoader to use
Returns:: the number of read and inserted entries
Throws:: IOException - if an I/O exception occurs

writeMap

public static void writeMap(DataOutput out,
                            Map map)
                     throws IOException

Write map content to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; map - the map to write
Throws:: IOException - if an I/O exception occurs

readCollection

public static int readCollection(DataInput in,
                                 Collection collection,
                                 ClassLoader loader)
                          throws IOException

Read collection content from a DataInput stream and update the specified collection.

This method reads elements from the stream and adds them into the specified collection one-by-one using the "add" method.

Parameters:: in - a DataInput stream to read from; collection - a collection to add the elements into; loader - the ClassLoader to use
Returns:: the number of read and inserted elements
Throws:: IOException - if an I/O exception occurs

writeCollection

public static void writeCollection(DataOutput out,
                                   Collection collection)
                            throws IOException

Write collection content to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; collection - the collection to write
Throws:: IOException - if an I/O exception occurs

readXmlSerializable

public static XmlSerializable readXmlSerializable(DataInput in)
                                           throws IOException

Read an XmlSerializable object from a DataInput stream.

Parameters:: in - a DataInput stream to read from
Returns:: an XmlSerializable value
Throws:: IOException - if an I/O exception occurs

readXmlSerializable

public static XmlSerializable readXmlSerializable(DataInput in,
                                                  ClassLoader loader)
                                           throws IOException

Read an XmlSerializable object from a DataInput stream.

Parameters:: in - a DataInput stream to read from; loader - the ClassLoader to use
Returns:: an XmlSerializable value
Throws:: IOException - if an I/O exception occurs

writeXmlSerializable

public static void writeXmlSerializable(DataOutput out,
                                        XmlSerializable o)
                                 throws IOException

Write an XmlSerializable object to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; o - an XmlSerializable value to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readExternalizableLite

public static ExternalizableLite readExternalizableLite(DataInput in)
                                                 throws IOException

Read an ExternalizableLite object from a DataInput stream.

Parameters:: in - a DataInput stream to read from
Returns:: an ExternalizableLite value
Throws:: IOException - if an I/O exception occurs

readExternalizableLite

public static ExternalizableLite readExternalizableLite(DataInput in,
                                                        ClassLoader loader)
                                                 throws IOException

Read an ExternalizableLite object from a DataInput stream.

Parameters:: in - a DataInput stream to read from; loader - the ClassLoader to use
Returns:: an ExternalizableLite value
Throws:: IOException - if an I/O exception occurs

writeExternalizableLite

public static void writeExternalizableLite(DataOutput out,
                                           ExternalizableLite o)
                                    throws IOException

Write an ExternalizableLite object to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; o - an ExternalizableLite value to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readXmlBean

public static XmlBean readXmlBean(DataInput in,
                                  ClassLoader loader)
                           throws IOException

Read an XmlBean object from a DataInput stream.

Parameters:: in - a DataInput stream to read from; loader - the ClassLoader to use
Returns:: an XmlBean value
Throws:: IOException - if an I/O exception occurs

writeXmlBean

public static void writeXmlBean(DataOutput out,
                                XmlBean bean)
                         throws IOException

Write an XmlBean object to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; bean - an XmlBean value to write
Throws:: IOException - if an I/O exception occurs; NullPointerException - if null value if passed

readSerializable

public static Serializable readSerializable(DataInput in)
                                     throws IOException

Read a Serializable object from a DataInput stream.

Parameters:: in - a DataInput stream to read from
Returns:: a Serializable value
Throws:: IOException - if an I/O exception occurs

readSerializable

public static Serializable readSerializable(DataInput in,
                                            ClassLoader loader)
                                     throws IOException

Read a Serializable object from a DataInput stream.

Parameters:: in - a DataInput stream to read from; loader - the ClassLoader to use
Returns:: a Serializable value
Throws:: IOException - if an I/O exception occurs

writeSerializable

public static void writeSerializable(DataOutput out,
                                     Serializable o)
                              throws IOException

Write a Serializable object to a DataOutput stream.

Parameters:: out - a DataOutput stream to write to; o - a Serializable value to write
Throws:: IOException - if an I/O exception occurs

readObject

public static Object readObject(DataInput in)
                         throws IOException

Read an Object from the passed DataInput object.

Parameters:: in - the DataInput stream to read an object from
Returns:: the object read from the DataInput; may be null
Throws:: IOException - if an I/O exception occurs

readObject

public static Object readObject(DataInput in,
                                ClassLoader loader)
                         throws IOException

Read an Object from the passed DataInput object.

Parameters:: in - the DataInput stream to read an object from; loader - the ClassLoader to use
Returns:: the object read from the DataInput; may be null
Throws:: IOException - if an I/O exception occurs

writeObject

public static void writeObject(DataOutput out,
                               Object o)
                        throws IOException

Write the specified data to the passed DataOutput object.

Parameters:: out - the DataOutput stream to write to; o - the data to write to the DataOutput; may be null
Throws:: IOException - if an I/O exception occurs

internalWriteObject

protected static WriteBuffer internalWriteObject(Object o,
                                                 boolean fBinary)
                                          throws IOException

Serialize the passed object into a buffer created for that purpose.

Parameters:: o - the object to write; fBinary - pass true to prefer a buffer type that is optimized for producing a Binary result
Returns:: the WriteBuffer that was created to hold the serialized form of the object
Throws:: IOException - if an I/O exception occurs

loadClass

public static Class loadClass(String sClass,
                              ClassLoader loader1,
                              ClassLoader loader2)
                       throws ClassNotFoundException

Attempt to load the specified class using sequentionally all of the specified loaders, the ContextClassLoader and the current class loader.

Parameters:: sClass - the class name; loader1 - first ClassLoader to try; loader2 - second ClassLoader to try
Returns:: the Class for the specified name
Throws:: ClassNotFoundException - if all the attempts fail

loadResource

public static URL loadResource(String sName,
                               ClassLoader loader1,
                               ClassLoader loader2)

Attempt to find a valid, resolvable URL for the specified resource, first by using each of the specified ClassLoaders, then using the ContextClassLoader.

Parameters:: sName - the resource name; loader1 - first ClassLoader to try; loader2 - second ClassLoader to try
Returns:: the URL for the specified resource name, or null if the resource could not be found

getInputStream

public static InputStream getInputStream(DataInput in)

Get an InputStream for the passed DataInput object.

Parameters:: in - an Object implementing the DataInput interface
Returns:: an Object of type InputStream

getOutputStream

public static OutputStream getOutputStream(DataOutput out)

Get an OutputStream for the passed DataOutput object.

Parameters:: out - an Object implementing the DataOutput interface
Returns:: an Object of type OutputStream

getShieldedOutputStream

public static OutputStream getShieldedOutputStream(OutputStream out)

Get a shielded OutputStream for the passed OutputStream object.

Parameters:: out - an OutputStream
Returns:: an OutputStream that implements the Shielded interface

getObjectInput

public static ObjectInput getObjectInput(InputStream in,
                                         ClassLoader loader)
                                  throws IOException

Get an ObjectInput for the passed InputStream object.

Parameters:: in - an InputStream; loader - the ClassLoader to use
Returns:: an Object of type ObjectInput
Throws:: IOException

getObjectInput

public static ObjectInput getObjectInput(DataInput in,
                                         ClassLoader loader)
                                  throws IOException

Get an ObjectInput for the passed DataInput object.

Parameters:: in - an Object implementing the DataInput interface; loader - the ClassLoader to use
Returns:: an Object of type ObjectInput
Throws:: IOException

getNewObjectInput

public static ObjectInput getNewObjectInput(DataInput in,
                                            ClassLoader loader)
                                     throws IOException

Get a new ObjectInput for the passed DataInput, even if the passed DataInput is an ObjectInput.

Parameters:: in - an Object implementing the DataInput interface; loader - the ClassLoader to use
Returns:: an Object of type ObjectInput that is guaranteed not to be the same reference as in
Throws:: IOException

resolveLoader

public static ClassLoader resolveLoader(ClassLoader loader)

Return the passed ClassLoader if one is passed; otherwise return the ContextClassLoader.

Parameters:: loader - a ClassLoader or null
Returns:: the passed ClassLoader, the ContextClassLoader, or null if neither is available

getObjectOutput

public static ObjectOutput getObjectOutput(OutputStream out)
                                    throws IOException

Get an ObjectOutput for the passed OutputStream object.

Parameters:: out - an OutputStream
Returns:: an Object of type ObjectOutput
Throws:: IOException

getObjectOutput

public static ObjectOutput getObjectOutput(DataOutput out)
                                    throws IOException

Get an ObjectOutput for the passed DataOutput object.

Parameters:: out - an Object implementing the DataOutput interface
Returns:: an Object of type ObjectOutput
Throws:: IOException

isMarshalled

public static boolean isMarshalled(DataOutput out)

Determine whether the passed DataOutput handles marshalling of ObjectOutput.

Parameters:: out - an object implementing DataOutput
Returns:: true if the object implementing DataOutput also implements ObjectOutput and handles marshalling

isResolving

public static boolean isResolving(DataOutput out)

Determine whether the passed DataOutput handles ClassLoader resolving. Note that the ClassLoader resolving on the "write" side is necessary only to make the stream format symetrical for the "read" side.

Parameters:: out - an object implementing DataOutput
Returns:: true if the object implementing DataOutput also implements ObjectOutput and handles ClassLoader resolving

isSerializable

public static boolean isSerializable(Object o)

Determine if the resource object can be serialized using the custom stream format support.

Returns:: true if the resource object can be serialized

isClassLoaderDependent

public static boolean isClassLoaderDependent(Object o)

Determine if the resource object may depend on a specific class loader.

Returns:: true if the resource object may need to use a non-system ClassLoader for deserialization; false otherwise

getStreamFormat

protected static int getStreamFormat(Object o)

Internal: Select an optimal stream format to use to store the passed object in a stream.

Parameters:: o - an Object
Returns:: a stream format to use to store the object in a stream

isDecorated

public static boolean isDecorated(Binary bin)

If the Binary is the result of serialization by ExternalizableHelper, determine if the Binary contains decorations.