/*
* 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.commons.configuration.tree.xpath;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.apache.commons.configuration.tree.ConfigurationNode;
import org.apache.commons.jxpath.ri.QName;
import org.apache.commons.jxpath.ri.model.NodePointer;
/**
* A specialized node iterator implementation that deals with attribute nodes.
*
* @author Oliver Heger
* @version $Id: ConfigurationNodeIteratorAttribute.java 439648 2006-09-02 20:42:10Z oheger $
*/
class ConfigurationNodeIteratorAttribute extends
ConfigurationNodeIteratorBase
{
/** Constant for the wildcard node name.*/
private static final String WILDCARD = "*";
/**
* Creates a new instance of <code>ConfigurationNodeIteratorAttribute</code>.
* @param parent the parent node pointer
* @param name the name of the selected attribute
*/
public ConfigurationNodeIteratorAttribute(NodePointer parent, QName name)
{
super(parent, false);
initSubNodeList(createSubNodeList((ConfigurationNode) parent.getNode(),
name));
}
/**
* Determines which attributes are selected based on the passed in node
* name.
* @param node the current node
* @param name the name of the selected attribute
* @return a list with the selected attributes
*/
protected List createSubNodeList(ConfigurationNode node, QName name)
{
if (name.getPrefix() != null)
{
// namespace prefixes are not supported
return Collections.EMPTY_LIST;
}
List result = new ArrayList();
if (!WILDCARD.equals(name.getName()))
{
result.addAll(node.getAttributes(name.getName()));
}
else
{
result.addAll(node.getAttributes());
}
return result;
}
}
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