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/**
* Copyright (C) 2011-2015 The XDocReport Team
*
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package fr.opensagres.xdocreport.template.velocity.internal;
import java.util.Stack;
import org.apache.velocity.runtime.parser.node.ASTDirective;
import org.apache.velocity.runtime.parser.node.ASTReference;
import org.apache.velocity.runtime.parser.node.ASTprocess;
import org.apache.velocity.runtime.visitor.BaseVisitor;
import fr.opensagres.xdocreport.template.FieldsExtractor;
public class ExtractVariablesVelocityVisitor
extends BaseVisitor
{
private final FieldsExtractor extractor;
public ExtractVariablesVelocityVisitor( FieldsExtractor extractor )
{
this.extractor = extractor;
}
private Stack foreachStack = new Stack();
@Override
public Object visit( ASTprocess node, Object data )
{
// TODO Auto-generated method stub
return super.visit( node, data );
}
@Override
public Object visit( ASTDirective node, Object data )
{
boolean isForeach = "foreach".equals( node.getDirectiveName() );
if ( isForeach )
{
foreachStack.push( new Foreach() );
}
Object o = super.visit( node, data );
if ( isForeach )
{
foreachStack.pop();
}
return o;
}
@Override
public Object visit( ASTReference node, Object data )
{
String variableName = node.literal();
if ( variableName.startsWith( "$" ) )
{
variableName = variableName.substring( 1, variableName.length() );
}
if ( !foreachStack.isEmpty() )
{
Foreach currentForeach = foreachStack.peek();
if ( currentForeach.getItem() == null )
{
currentForeach.setItem( variableName );
}
else if ( currentForeach.getSequence() == null )
{
currentForeach.setSequence( variableName );
}
else
{
String firstToken = variableName;
int index = firstToken.indexOf( '.' );
if ( index != -1 )
{
firstToken = firstToken.substring( 0, index );
}
if ( firstToken.equals( currentForeach.getItem() ) )
{
String field = "";
if ( index != -1 )
{
field = variableName.substring( index, variableName.length() );
}
extractor.addFieldName( currentForeach.getSequence() + field, true );
}
else {
extractor.addFieldName( variableName, false );
}
}
}
else
{
extractor.addFieldName( variableName, false );
}
return super.visit( node, data );
}
}
