01: /**
02: * Licensed to the Apache Software Foundation (ASF) under one
03: * or more contributor license agreements. See the NOTICE file
04: * distributed with this work for additional information
05: * regarding copyright ownership. The ASF licenses this file
06: * to you under the Apache License, Version 2.0 (the
07: * "License"); you may not use this file except in compliance
08: * with the License. You may obtain a copy of the License at
09: *
10: * http://www.apache.org/licenses/LICENSE-2.0
11: *
12: * Unless required by applicable law or agreed to in writing,
13: * software distributed under the License is distributed on an
14: * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15: * KIND, either express or implied. See the License for the
16: * specific language governing permissions and limitations
17: * under the License.
18: */package org.apache.cxf.helpers;
19:
20: import java.util.Map;
21:
22: import javax.xml.namespace.NamespaceContext;
23: import javax.xml.namespace.QName;
24: import javax.xml.xpath.XPath;
25: import javax.xml.xpath.XPathFactory;
26:
27: import org.w3c.dom.Node;
28:
29: public class XPathUtils {
30:
31: XPath xpath;
32:
33: public XPathUtils() {
34: xpath = XPathFactory.newInstance().newXPath();
35: }
36:
37: public XPathUtils(final Map<String, String> ns) {
38: this ();
39:
40: if (ns != null) {
41: xpath.setNamespaceContext(new MapNamespaceContext(ns));
42: }
43: }
44:
45: public XPathUtils(final NamespaceContext ctx) {
46: this ();
47: xpath.setNamespaceContext(ctx);
48: }
49:
50: public Object getValue(String xpathExpression, Node node, QName type) {
51: try {
52: return xpath.evaluate(xpathExpression, node, type);
53: } catch (Exception e) {
54: return null;
55: }
56: }
57:
58: public boolean isExist(String xpathExpression, Node node, QName type) {
59: return getValue(xpathExpression, node, type) != null;
60: }
61: }
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