geirm 01/12/07 12:31:09 Added: whiteboard/geir delay.properties Delay.java Log: Example directive to try to solve the multi-pass problem of Thomas and Dan Revision Changes Path 1.1 jakarta-velocity/whiteboard/geir/delay.properties Index: delay.properties =================================================================== userdirective = org.apache.velocity.runtime.directive.Delay 1.1 jakarta-velocity/whiteboard/geir/Delay.java Index: Delay.java =================================================================== /* * The Apache Software License, Version 1.1 * * Copyright (c) 2000-2001 The Apache Software Foundation. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, if * any, must include the following acknowlegement: * "This product includes software developed by the * Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowlegement may appear in the software itself, * if and wherever such third-party acknowlegements normally appear. * * 4. The names "The Jakarta Project", "Velocity","DVSL" and "Apache Software * Foundation" must not be used to endorse or promote products derived * from this software without prior written permission. For written * permission, please contact [EMAIL PROTECTED] * * 5. 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IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. */ package org.apache.velocity.runtime.directive; import java.io.Writer; import java.io.IOException; import java.util.List; import java.util.ArrayList; import org.apache.velocity.context.InternalContextAdapter; import org.apache.velocity.runtime.parser.node.Node; import org.apache.velocity.runtime.parser.node.SimpleNode; import org.apache.velocity.runtime.directive.Directive; import org.apache.velocity.runtime.RuntimeServices; import org.apache.velocity.runtime.parser.Token; import org.apache.velocity.runtime.parser.node.NodeUtils; /** * * * @author <a href="mailto:[EMAIL PROTECTED]";>Geir Magnusson Jr.</a> */ public class Delay extends Directive { List astStrings = null; public String getName() { return "delay"; } public int getType() { return BLOCK; } public void init( RuntimeServices rs, InternalContextAdapter context, Node node) throws Exception { super.init( rs, context, node ); astStrings = getASTAsStringArray( node.jjtGetChild(1) ); } public boolean render( InternalContextAdapter context, Writer writer, Node node) throws IOException { /* * what is our arg? */ int ival = 0; try { Integer val = (Integer) node.jjtGetChild(0).value(context); ival = val.intValue(); } catch( Exception ee ) {} System.out.println( "value : " + ival ); if ( ival > 1 ) { writer.write("#delay( " + --ival + " )\n " ); for( int i = 0; i < astStrings.size(); i++ ) { writer.write( (String) astStrings.get( i ) ); } writer.write("#end"); } else { for( int i = 0; i < astStrings.size(); i++ ) { writer.write( (String) astStrings.get( i ) ); } } return true; } private static List getASTAsStringArray( Node rootNode ) { /* * this assumes that we are passed in the root * node of the code block */ Token t = rootNode.getFirstToken(); Token tLast = rootNode.getLastToken(); /* * now, run down the part of the tree bounded by * our first and last tokens */ ArrayList list = new ArrayList(); t = rootNode.getFirstToken(); while( t != tLast ) { list.add( NodeUtils.tokenLiteral( t ) ); t = t.next; } /* * make sure we get the last one... */ list.add( NodeUtils.tokenLiteral( t ) ); return list; } }
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