package org.apache.maven.project.harness;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.jxpath.ri.Compiler;
import org.apache.commons.jxpath.ri.compiler.NodeNameTest;
import org.apache.commons.jxpath.ri.compiler.NodeTest;
import org.apache.commons.jxpath.ri.compiler.NodeTypeTest;
import org.apache.commons.jxpath.ri.model.NodeIterator;
import org.apache.commons.jxpath.ri.model.NodePointer;
import org.codehaus.plexus.util.StringUtils;
import org.codehaus.plexus.util.xml.Xpp3Dom;
/**
* A node iterator for JXPath to support Xpp3Dom
.
*
* @author Benjamin Bentmann
*/
class Xpp3DomNodeIterator
implements NodeIterator
{
private NodePointer parent;
private NodeTest test;
private Xpp3Dom node;
private Xpp3Dom[] children;
private List filteredChildren = new ArrayList();
private int filteredIndex;
private Xpp3Dom child;
private int position;
public Xpp3DomNodeIterator( NodePointer parent, NodeTest test, boolean reverse, NodePointer startWith )
{
this.parent = parent;
this.node = (Xpp3Dom) parent.getNode();
this.children = this.node.getChildren();
if ( startWith != null )
{
Xpp3Dom startWithNode = (Xpp3Dom) startWith.getNode();
for ( ; filteredIndex < children.length; filteredIndex++ )
{
if ( startWithNode.equals( children[filteredIndex] ) )
{
filteredIndex++;
break;
}
}
}
this.test = test;
if ( reverse )
{
throw new UnsupportedOperationException();
}
}
public NodePointer getNodePointer()
{
if ( position == 0 )
{
setPosition( 1 );
}
return ( child == null ) ? null : new Xpp3DomNodePointer( parent, child );
}
public int getPosition()
{
return position;
}
public boolean setPosition( int position )
{
this.position = position;
filterChildren( position );
child = ( position > 0 && position <= filteredChildren.size() ) ? filteredChildren.get( position - 1 ) : null;
return child != null;
}
private void filterChildren( int position )
{
for ( ; position > filteredChildren.size() && filteredIndex < children.length; filteredIndex++ )
{
Xpp3Dom child = children[filteredIndex];
if ( testNode( child ) )
{
filteredChildren.add( child );
}
}
}
private boolean testNode( Xpp3Dom node )
{
if ( test == null )
{
return true;
}
if ( test instanceof NodeNameTest )
{
String nodeName = node.getName();
if ( StringUtils.isEmpty( nodeName ) )
{
return false;
}
NodeNameTest nodeNameTest = (NodeNameTest) test;
String namespaceURI = nodeNameTest.getNamespaceURI();
boolean wildcard = nodeNameTest.isWildcard();
String testName = nodeNameTest.getNodeName().getName();
String testPrefix = nodeNameTest.getNodeName().getPrefix();
if ( wildcard && testPrefix == null )
{
return true;
}
if ( wildcard || testName.equals( nodeName ) )
{
return StringUtils.isEmpty( namespaceURI ) || StringUtils.isEmpty( testPrefix );
}
return false;
}
if ( test instanceof NodeTypeTest )
{
switch ( ( (NodeTypeTest) test ).getNodeType() )
{
case Compiler.NODE_TYPE_NODE:
return true;
case Compiler.NODE_TYPE_TEXT:
return node.getValue() != null;
default:
return false;
}
}
return false;
}
}