/*
* 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.
*/
package org.apache.cocoon.stax.navigation;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.EndElement;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;
/**
* This implementation of the {@link Navigator} returns true of
* {@link Navigator#fulfillsCriteria(XMLEvent)} any time it is called with a {@link EndElement} full
* filling all conditions the {@link Navigator} was created with.
* <p>
* The "partner" of this {@link Navigator} is the {@link FindStartElementNavigator} working exactly
* as the {@link FindEndElementNavigator} for the {@link StartElement}.
*
* <pre>
* <anyElement> -> false
* <searchedElement> -> false
* <anyElement\> -> false
* <searchedElement\> -> true
* <\searchedElement> -> true
* <\anyElement> -> false
* </pre>
*/
public class FindEndElementNavigator implements Navigator {
private String name;
private List<Attribute> attributes = new ArrayList<Attribute>();
private List<String> levelRememberer = new ArrayList<String>();
private int count = 0;
private boolean active;
public FindEndElementNavigator(String name) {
this.name = name;
}
public FindEndElementNavigator(String name, List<Attribute> attributes) {
this.name = name;
if (attributes != null) {
this.attributes = attributes;
}
}
public FindEndElementNavigator(String name, Attribute... attributes) {
this.name = name;
if (attributes != null) {
this.attributes = new ArrayList<Attribute>(Arrays.asList(attributes));
}
}
/**
* {@inheritDoc}
*
* @see org.apache.cocoon.stax.navigation.Navigator#fulfillsCriteria(javax.xml.stream.events.XMLEvent)
*/
public boolean fulfillsCriteria(XMLEvent event) {
if (event.isStartElement()) {
StartElement element = (StartElement) event;
if (!element.getName().getLocalPart().equals(this.name)) {
this.active = false;
return this.active;
}
this.count++;
for (Attribute attribute : this.attributes) {
if (!attribute.getValue().equals(element.getAttributeByName(attribute.getName()).getValue())) {
this.active = false;
return this.active;
}
}
this.levelRememberer.add(String.valueOf(this.count));
this.active = false;
return this.active;
} else if (event.isEndElement()) {
EndElement element = (EndElement) event;
if (element.getName().getLocalPart().equals(this.name) && this.count > 0) {
if (this.levelRememberer.contains(String.valueOf(this.count))) {
this.levelRememberer.remove(String.valueOf(this.count));
this.count--;
this.active = true;
return this.active;
}
this.count--;
}
}
this.active = false;
return this.active;
}
/**
* {@inheritDoc}
*
* @see org.apache.cocoon.stax.navigation.Navigator#isActive()
*/
public boolean isActive() {
return this.active;
}
}