org.apache.velocity.runtime.directive
Class Include

java.lang.Object
  |
  +--org.apache.velocity.runtime.directive.Directive
        |
        +--org.apache.velocity.runtime.directive.Include

All Implemented Interfaces:

java.lang.Cloneable, DirectiveConstants

public class Include

extends Directive

Pluggable directive that handles the #include() statement in VTL. This #include() can take multiple arguments of either StringLiteral or Reference. Notes: ----- 1) The included source material can only come from somewhere in the TemplateRoot tree for security reasons. There is no way around this. If you want to include content from elsewhere on your disk, use a link from somwhere under Template Root to that content. 2) By default, there is no output to the render stream in the event of a problem. You can override this behavior with two property values : include.output.errormsg.start include.output.errormsg.end If both are defined in velocity.properties, they will be used to in the render output to bracket the arg string that caused the problem. Ex. : if you are working in html then include.output.errormsg.start= might be an excellent way to start... 3) As noted above, #include() can take multiple arguments. Ex : #include( "foo.vm" "bar.vm" $foo ) will simply include all three if valid to output w/o any special separator.

Version:

$Id: Include.java,v 1.23 2001/10/22 03:53:24 jon Exp $

Author:

Geir Magnusson Jr., Jason van Zyl, Kasper Nielsen

Field Summary

private java.lang.String	outputMsgEnd
private java.lang.String	outputMsgStart

Fields inherited from class org.apache.velocity.runtime.directive.Directive

column, line, rsvc

Fields inherited from interface org.apache.velocity.runtime.directive.DirectiveConstants

BLOCK, LINE

Constructor Summary

Include()

Method Summary

java.lang.String	getName() Return name of this directive.
int	getType() Return type of this directive.
void	init(RuntimeServices rs, InternalContextAdapter context, Node node) simple init - init the tree and get the elementKey from the AST
private void	outputErrorToStream(java.io.Writer writer, java.lang.String msg) Puts a message to the render output stream if ERRORMSG_START / END are valid property strings.
boolean	render(InternalContextAdapter context, java.io.Writer writer, Node node) iterates through the argument list and renders every argument that is appropriate.
private boolean	renderOutput(Node node, InternalContextAdapter context, java.io.Writer writer) does the actual rendering of the included file

Methods inherited from class org.apache.velocity.runtime.directive.Directive

getColumn, getLine, setLocation

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

outputMsgStart

private java.lang.String outputMsgStart

outputMsgEnd

private java.lang.String outputMsgEnd

Constructor Detail

Include

public Include()

Method Detail

getName

public java.lang.String getName()

Return name of this directive.

Overrides:

getName in class Directive

getType

public int getType()

Return type of this directive.

Overrides:

getType in class Directive

init

public void init(RuntimeServices rs,
                 InternalContextAdapter context,
                 Node node)
          throws java.lang.Exception

simple init - init the tree and get the elementKey from the AST

Overrides:

init in class Directive

render

public boolean render(InternalContextAdapter context,
                      java.io.Writer writer,
                      Node node)
               throws java.io.IOException,
                      MethodInvocationException,
                      ResourceNotFoundException

iterates through the argument list and renders every argument that is appropriate. Any non appropriate arguments are logged, but render() continues.

Overrides:

render in class Directive

renderOutput

private boolean renderOutput(Node node,
                             InternalContextAdapter context,
                             java.io.Writer writer)
                      throws java.io.IOException,
                             MethodInvocationException,
                             ResourceNotFoundException

does the actual rendering of the included file

Parameters:

node - AST argument of type StringLiteral or Reference

context - valid context so we can render References

writer - output Writer

Returns:

boolean success or failure. failures are logged

outputErrorToStream

private void outputErrorToStream(java.io.Writer writer,
                                 java.lang.String msg)
                          throws java.io.IOException

Puts a message to the render output stream if ERRORMSG_START / END are valid property strings. Mainly used for end-user template debugging.