Examples of org.jaxen.dom.DOMXPath

org.jaxen.dom.DOMXPath
An XPath implementation for the W3C DOM model
This is the main entry point for matching an XPath against a DOM tree. You create a compiled XPath object, then match it against one or more context nodes using the {@link #selectNodes}method, as in the following example:
```
 XPath path = new DOMXPath("a/b/c"); List results = path.selectNodes(domNode); 
```
@see BaseXPath @author James Strachan @author bob mcwhirter @version $Revision: 1.2 $

        
    }    
    
    public void testMultipleAttributesOnElement() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("/descendant::x/@*");
        org.w3c.dom.Element a = doc.createElementNS("", "a");
        org.w3c.dom.Element b = doc.createElementNS("", "b");
        doc.appendChild(a);
        org.w3c.dom.Element x1 = doc.createElementNS("", "x");
        a.appendChild(x1);
        a.appendChild(b);
        
        Attr a1 = doc.createAttribute("name1");
        a1.setNodeValue("1");
        x1.setAttributeNode(a1);
        Attr a2 = doc.createAttribute("name2");
        a2.setNodeValue("2");
        x1.setAttributeNode(a2);
        Attr a3 = doc.createAttribute("name3");
        a3.setNodeValue("3");
        x1.setAttributeNode(a3);
        Attr a4 = doc.createAttribute("name4");
        a4.setNodeValue("4");
        x1.setAttributeNode(a4);
        
        List result = xpath.selectNodes(doc);
        assertEquals(4, result.size());
        assertTrue(result.contains(a1));
        assertTrue(result.contains(a2));
        assertTrue(result.contains(a3));
        assertTrue(result.contains(a4));

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        root.setAttributeNodeNS(p1);
        
        org.w3c.dom.Element child = doc.createElement("child312");
        root.appendChild(child);
        
        BaseXPath xpath = new DOMXPath("ancestor::*/@xml:*");
        List result = xpath.selectNodes(child);
        assertEquals(2, result.size());
        assertEquals(p0, result.get(0));
        assertEquals(p1, result.get(1));
        
    }

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    }
    
    public void testDescendantAxisWithAttributesAndChildren() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("/descendant::x/@* | /descendant::x");
        org.w3c.dom.Element a = doc.createElementNS("", "a");
        org.w3c.dom.Element b = doc.createElementNS("", "b");
        doc.appendChild(a);
        org.w3c.dom.Element x1 = doc.createElementNS("", "x");
        a.appendChild(x1);
        a.appendChild(b);
        org.w3c.dom.Element x2 = doc.createElementNS("", "x");
        org.w3c.dom.Element x3 = doc.createElementNS("", "x");
        org.w3c.dom.Element x4 = doc.createElementNS("", "x");
        a.appendChild(x4);
        b.appendChild(x2);
        b.appendChild(x3);
        
        Attr a1 = doc.createAttribute("name");
        a1.setNodeValue("1");
        x1.setAttributeNode(a1);
        Attr a2 = doc.createAttribute("name");
        a2.setNodeValue("2");
        x2.setAttributeNode(a2);
        Attr a3 = doc.createAttribute("name");
        a3.setNodeValue("3");
        x3.setAttributeNode(a3);
        Attr a4 = doc.createAttribute("name");
        a4.setNodeValue("4");
        x4.setAttributeNode(a4);
        
        List result = xpath.selectNodes(doc);
        assertEquals(8, result.size());
        assertEquals(x1, result.get(0));   
        assertEquals(a1, result.get(1));   
        assertEquals(x2, result.get(2));   
        assertEquals(a2, result.get(3));

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    }    
    
    public void testAncestorAxisWithAttributes() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("ancestor::*/@*");
        org.w3c.dom.Element a = doc.createElementNS("", "a");
        org.w3c.dom.Element b = doc.createElementNS("", "b");
        doc.appendChild(a);
        a.appendChild(b);
        org.w3c.dom.Element x3 = doc.createElementNS("", "x");
        b.appendChild(x3);
        
        Attr a1 = doc.createAttribute("name");
        a1.setNodeValue("1");
        a.setAttributeNode(a1);
        Attr a2 = doc.createAttribute("name");
        a2.setNodeValue("2");
        b.setAttributeNode(a2);
        Attr a3 = doc.createAttribute("name");
        x3.setNodeValue("3");
        x3.setAttributeNode(a3);
        
        List result = xpath.selectNodes(x3);
        assertEquals(2, result.size());
        assertEquals(a1, result.get(0));   
        assertEquals(a2, result.get(1)); 
        
    }

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    }    
    
    // test for Jaxen-83
    public void testPrincipalNodeTypeOfSelfAxisIsElement() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("child/@*[self::test]");
        org.w3c.dom.Element a = doc.createElementNS("", "child");
        org.w3c.dom.Attr test = doc.createAttributeNS("", "test");
        test.setValue("value");
        a.setAttributeNode(test);
        doc.appendChild(a);
        
        List result = xpath.selectNodes(doc);
        assertEquals(0, result.size()); 
        
    }

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    }
    
    // test to make sure Jaxen-83 fix doesn't go too far
    public void testSelfAxisWithNodeTestCanReturnNonPrincipalNodeType() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("child/@*[self::node()]");
        org.w3c.dom.Element a = doc.createElementNS("", "child");
        org.w3c.dom.Attr test = doc.createAttributeNS("", "test");
        test.setValue("value");
        a.setAttributeNode(test);
        doc.appendChild(a);
        
        List result = xpath.selectNodes(doc);
        assertEquals(1, result.size());   
        
    }

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    // another Jaxen-55 test to try to pin down exactly what does
    // and doesn't work
    public void testDescendantOrSelfAxis() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("/descendant-or-self::x");
        org.w3c.dom.Element a = doc.createElementNS("", "a");
        org.w3c.dom.Element b = doc.createElementNS("", "b");
        doc.appendChild(a);
        org.w3c.dom.Element x1 = doc.createElementNS("", "x");
        x1.appendChild(doc.createTextNode("1"));
        a.appendChild(x1);
        a.appendChild(b);
        org.w3c.dom.Element x2 = doc.createElementNS("", "x");
        org.w3c.dom.Element x3 = doc.createElementNS("", "x");
        org.w3c.dom.Element x4 = doc.createElementNS("", "x");
        a.appendChild(x4);
        b.appendChild(x2);
        b.appendChild(x3);
        x2.appendChild(doc.createTextNode("2"));
        x3.appendChild(doc.createTextNode("3"));
        x4.appendChild(doc.createTextNode("4"));
        
        List result = xpath.selectNodes(doc);
        assertEquals(4, result.size());
        assertEquals(x1, result.get(0));   
        assertEquals(x2, result.get(1));   
        assertEquals(x3, result.get(2));   
        assertEquals(x4, result.get(3));

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    }    
    
    
    public void testDuplicateNodes() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("//x | //*");
        org.w3c.dom.Element a = doc.createElementNS("", "a");
        org.w3c.dom.Element b = doc.createElementNS("", "b");
        doc.appendChild(a);
        org.w3c.dom.Element x1 = doc.createElementNS("", "x");
        x1.appendChild(doc.createTextNode("1"));
        a.appendChild(x1);
        a.appendChild(b);
        org.w3c.dom.Element x2 = doc.createElementNS("", "x");
        org.w3c.dom.Element x3 = doc.createElementNS("", "x");
        org.w3c.dom.Element x4 = doc.createElementNS("", "x");
        a.appendChild(x4);
        b.appendChild(x2);
        b.appendChild(x3);
        x2.appendChild(doc.createTextNode("2"));
        x3.appendChild(doc.createTextNode("3"));
        x4.appendChild(doc.createTextNode("4"));
        
        List result = xpath.selectNodes(doc);
        assertEquals(6, result.size());
        
    }

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    }    
       
    public void testUnionOfNodesWithNonNodes() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("count(//*) | //x ");
        org.w3c.dom.Element a = doc.createElementNS("", "a");
        org.w3c.dom.Element b = doc.createElementNS("", "b");
        doc.appendChild(a);
        org.w3c.dom.Element x1 = doc.createElementNS("", "x");
        x1.appendChild(doc.createTextNode("1"));
        a.appendChild(x1);
        a.appendChild(b);
        org.w3c.dom.Element x2 = doc.createElementNS("", "x");
        org.w3c.dom.Element x3 = doc.createElementNS("", "x");
        org.w3c.dom.Element x4 = doc.createElementNS("", "x");
        a.appendChild(x4);
        b.appendChild(x2);
        b.appendChild(x3);
        x2.appendChild(doc.createTextNode("2"));
        x3.appendChild(doc.createTextNode("3"));
        x4.appendChild(doc.createTextNode("4"));
        
        try {
            xpath.selectNodes(doc);
            fail("Allowed union with non-node-set");
        }
        catch (JaxenException ex) {
            assertNotNull(ex.getMessage());
        }

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    }    
    
    public void testUnionOfEmptyNodeSetWithNonNodes() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("//y | count(//*)");
        org.w3c.dom.Element a = doc.createElementNS("", "a");
        org.w3c.dom.Element b = doc.createElementNS("", "b");
        doc.appendChild(a);
        org.w3c.dom.Element x1 = doc.createElementNS("", "x");
        x1.appendChild(doc.createTextNode("1"));
        a.appendChild(x1);
        a.appendChild(b);
        org.w3c.dom.Element x2 = doc.createElementNS("", "x");
        b.appendChild(x2);
        x2.appendChild(doc.createTextNode("2"));
        
        try {
            xpath.selectNodes(doc);
            fail("Allowed union with non-node-set");
        }
        catch (JaxenException ex) {
            assertNotNull(ex.getMessage());
        }

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