01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.commons.configuration.tree.xpath;
18:
19: import java.util.ArrayList;
20: import java.util.Collections;
21: import java.util.List;
22:
23: import org.apache.commons.configuration.tree.ConfigurationNode;
24: import org.apache.commons.jxpath.ri.QName;
25: import org.apache.commons.jxpath.ri.model.NodePointer;
26:
27: /**
28: * A specialized node iterator implementation that deals with attribute nodes.
29: *
30: * @author Oliver Heger
31: * @version $Id: ConfigurationNodeIteratorAttribute.java 439648 2006-09-02 20:42:10Z oheger $
32: */
33: class ConfigurationNodeIteratorAttribute extends
34: ConfigurationNodeIteratorBase {
35: /** Constant for the wildcard node name.*/
36: private static final String WILDCARD = "*";
37:
38: /**
39: * Creates a new instance of <code>ConfigurationNodeIteratorAttribute</code>.
40: * @param parent the parent node pointer
41: * @param name the name of the selected attribute
42: */
43: public ConfigurationNodeIteratorAttribute(NodePointer parent,
44: QName name) {
45: super (parent, false);
46: initSubNodeList(createSubNodeList((ConfigurationNode) parent
47: .getNode(), name));
48: }
49:
50: /**
51: * Determines which attributes are selected based on the passed in node
52: * name.
53: * @param node the current node
54: * @param name the name of the selected attribute
55: * @return a list with the selected attributes
56: */
57: protected List createSubNodeList(ConfigurationNode node, QName name) {
58: if (name.getPrefix() != null) {
59: // namespace prefixes are not supported
60: return Collections.EMPTY_LIST;
61: }
62:
63: List result = new ArrayList();
64: if (!WILDCARD.equals(name.getName())) {
65: result.addAll(node.getAttributes(name.getName()));
66: } else {
67: result.addAll(node.getAttributes());
68: }
69:
70: return result;
71: }
72: }
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