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1
22 package org.jboss.test.xml;
23
24 import java.io.ByteArrayInputStream  ;
25 import java.util.ArrayList ;
26 import java.util.Iterator ;
27
28 import javax.xml.namespace.NamespaceContext ;
29 import javax.xml.parsers.DocumentBuilder ;
30 import javax.xml.parsers.DocumentBuilderFactory ;
31 import javax.xml.xpath.XPath ;
32 import javax.xml.xpath.XPathConstants ;
33 import javax.xml.xpath.XPathExpression ;
34 import javax.xml.xpath.XPathFactory ;
35
36 import junit.framework.TestCase;
37
38 import org.w3c.dom.Document ;
39 import org.w3c.dom.NodeList ;
40
41
47 public class JaxpXPathBaseTestCase extends TestCase
48 {
49 protected static final String XML_STRING_SIMPLE = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
50 + "<employees>"
51 + " <employee>"
52 + " <name>e1</name>"
53 + " </employee>"
54 + " <employee>"
55 + " <name>e2</name>"
56 + " </employee>" + "</employees>";
57
58 protected static final String XML_STRING_NS = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
59 + "<foo:employees xmlns:foo=\"http://www.jboss.org/foobar\">"
60 + " <foo:employee>"
61 + " <name>e1</name>"
62 + " </foo:employee>"
63 + " <foo:employee>"
64 + " <name>e2</name>"
65 + " </foo:employee>"
66 + "</foo:employees>";
67
68 protected void setUp() throws Exception
69 {
70 super.setUp();
71 }
72
73 protected void tearDown() throws Exception
74 {
75 super.tearDown();
76 }
77
78 public void testXPathDefaultFactoryCreate()
79 {
80 assertNotNull(newXpathFactoryInstance());
81 }
82
83 public void testSimpleXpathExpression() throws Exception
84 {
85 XPathFactory xpathFactory = newXpathFactoryInstance();
86 XPath xpath = xpathFactory.newXPath();
87
88 Document doc = parseXML(XML_STRING_SIMPLE);
89
90 String xpe1 = "/employees/employee";
91 XPathExpression employeesXPath = xpath.compile(xpe1);
92
93 NodeList nl = (NodeList ) employeesXPath.evaluate(doc,
94 XPathConstants.NODESET);
95
96 assertNotNull(nl);
97 assertEquals(nl.getLength(), 2);
98 assertEquals(nl.item(0).getTextContent().trim(), "e1");
99 assertEquals(nl.item(1).getTextContent().trim(), "e2");
100 }
101
102 public void testNamespaceXpathExpression() throws Exception
103 {
104 XPathFactory xpathFactory = newXpathFactoryInstance();
105 XPath xpath = xpathFactory.newXPath();
106 xpath.setNamespaceContext(new JBossFooBarNamespaceContext());
107
108 Document doc = parseXML(XML_STRING_NS);
109
110 String xpe1 = "/employees/employee";
111 XPathExpression badXPath = xpath.compile(xpe1);
112 NodeList nl = (NodeList ) badXPath.evaluate(doc, XPathConstants.NODESET);
113 assertNotNull(nl);
114 assertEquals(0, nl.getLength());
115
116 String xpe2 = "//foo:employee";
117 XPathExpression empXPath = xpath.compile(xpe2);
118 NodeList nl2 = (NodeList ) empXPath.evaluate(doc, XPathConstants.NODESET);
119
120 assertNotNull(nl2);
121 assertEquals(2, nl2.getLength());
122 assertEquals("e1", nl2.item(0).getTextContent().trim());
123 assertEquals("e2", nl2.item(1).getTextContent().trim());
124 }
125
126 protected XPathFactory newXpathFactoryInstance()
127 {
128 return XPathFactory.newInstance();
129 }
130
131 protected Document parseXML(String xml) throws Exception
132 {
133 DocumentBuilderFactory dbfactory = DocumentBuilderFactory.newInstance();
134 dbfactory.setNamespaceAware(true);
135 dbfactory.setXIncludeAware(true);
136
137 DocumentBuilder parser = dbfactory.newDocumentBuilder();
138
139 ByteArrayInputStream is = new ByteArrayInputStream (xml.getBytes());
140
141 Document doc = parser.parse(is);
142
143 return doc;
144 }
145
146 protected class JBossFooBarNamespaceContext implements NamespaceContext
147 {
148 public String getNamespaceURI(String prefix)
149 {
150 return "http://www.jboss.org/foobar";
151 }
152
153 public String getPrefix(String namespaceURI)
154 {
155 return "foo";
156 }
157
158 public Iterator getPrefixes(String namespaceURI)
159 {
160 ArrayList list = new ArrayList ();
161 list.add("foo");
162 return list.iterator();
163 }
164 }
165 } |
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