177 lines
11 KiB
HTML
177 lines
11 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
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<title>XQilla DOM3 API Documentation</title>
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<a style="float:right;" href="http://sourceforge.net/projects/xqilla"><img src="http://sflogo.sourceforge.net/sflogo.php?group_id=152021&type=2" border="0" alt="SourceForge.net Logo" /></a>
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<!-- Generated by Doxygen 1.7.3 -->
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<div id="navrow1" class="tabs">
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<ul class="tablist">
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<li><a href="index.html"><span>Main Page</span></a></li>
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<li><a href="namespaces.html"><span>Namespaces</span></a></li>
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<li><a href="annotated.html"><span>Classes</span></a></li>
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<li><a href="files.html"><span>Files</span></a></li>
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<li><a href="examples.html"><span>Examples</span></a></li>
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</ul>
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</div>
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</div>
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<div class="header">
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<div class="headertitle">
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<h1>dom-resolver.cpp</h1> </div>
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</div>
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<div class="contents">
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<p>This example shows an example of running multiple queries, using a DOMXPathNSResolver to resolve namespaces.</p>
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<div class="fragment"><pre class="fragment"><span class="comment">/*</span>
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<span class="comment"> * Copyright (c) 2001, 2008,</span>
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<span class="comment"> * DecisionSoft Limited. All rights reserved.</span>
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<span class="comment"> * Copyright (c) 2004, 2011,</span>
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<span class="comment"> * Oracle and/or its affiliates. All rights reserved.</span>
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<span class="comment"> *</span>
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<span class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</span>
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<span class="comment"> * you may not use this file except in compliance with the License.</span>
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<span class="comment"> * You may obtain a copy of the License at</span>
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<span class="comment"> *</span>
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<span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span>
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<span class="comment"> *</span>
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<span class="comment"> * Unless required by applicable law or agreed to in writing, software</span>
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<span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span>
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<span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
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<span class="comment"> * See the License for the specific language governing permissions and</span>
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<span class="comment"> * limitations under the License.</span>
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<span class="comment"> */</span>
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<span class="preprocessor">#include <iostream></span>
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<span class="preprocessor">#include <<a class="code" href="DOM_8hpp.html">xercesc/dom/DOM.hpp</a>></span>
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<span class="preprocessor">#include <xercesc/framework/StdOutFormatTarget.hpp></span>
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<span class="preprocessor">#include <<a class="code" href="xqilla-dom3_8hpp.html">xqilla/xqilla-dom3.hpp</a>></span>
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XERCES_CPP_NAMESPACE_USE;
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<span class="keyword">using namespace </span>std;
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<span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[])
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{
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<span class="keywordflow">if</span>(argc != 2) {
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cerr << <span class="stringliteral">"Data file not specified."</span> << endl;
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<span class="keywordflow">return</span> 1;
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}
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<span class="comment">// Initialise XQilla //</span>
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<span class="comment"></span>
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<span class="comment">// 1. Initialize XQilla</span>
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<span class="comment">//</span>
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<span class="comment">// Note that this initialisation takes care of initialising</span>
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<span class="comment">// xerces-c as well</span>
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<span class="keywordflow">try</span> {
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<a name="a0"></a><a class="code" href="classXQillaPlatformUtils.html#ac769d09556ec43ecb94d1822783ba0b8" title="Perform XQilla initialization.">XQillaPlatformUtils::initialize</a>();
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} <span class="keywordflow">catch</span> (<span class="keyword">const</span> XMLException& eXerces) {
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cerr << <span class="stringliteral">"Error during Xerces-C initialisation.\n"</span>
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<< <span class="stringliteral">"Xerces exception message: "</span>
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<< UTF8(eXerces.getMessage()) << endl;
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<span class="keywordflow">return</span> 1;
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}
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<span class="keywordflow">try</span> {
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<span class="comment">// 2. Obtain a DOM3 XPath2 implementation. This is a XQilla-specific </span>
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<span class="comment">// implementation that overrides the standard DOMDocument, the standard </span>
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<span class="comment">// DOMWriter and the standard DOMBuilder</span>
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DOMImplementation* xqillaImplementation =
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DOMImplementationRegistry::getDOMImplementation(X(<span class="stringliteral">"XPath2 3.0"</span>));
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<span class="comment">// 3. Obtain a parser and set 'do namespaces', 'use schema' and 'validate' to </span>
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<span class="comment">// true.</span>
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<span class="comment">// Create a DOMLSParser object</span>
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<a name="_a1"></a><a class="code" href="classAutoRelease.html">AutoRelease<DOMLSParser></a> parser(xqillaImplementation->createLSParser(DOMImplementationLS::MODE_SYNCHRONOUS, 0));
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parser->getDomConfig()->setParameter(XMLUni::fgDOMNamespaces, <span class="keyword">true</span>);
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parser->getDomConfig()->setParameter(XMLUni::fgXercesSchema, <span class="keyword">true</span>);
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parser->getDomConfig()->setParameter(XMLUni::fgDOMValidateIfSchema, <span class="keyword">true</span>);
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<span class="comment">// Parse our XML document //</span>
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<span class="comment"></span>
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DOMDocument *document = parser->parseURI(argv[1]);
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<span class="keywordflow">if</span>(document == 0) {
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cerr << <span class="stringliteral">"Document not found: "</span> << argv[1] << endl;
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<span class="keywordflow">return</span> 1;
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}
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<span class="comment">// Create a parsed expression //</span>
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<span class="comment">// (compiled) and evaluate it //</span>
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<span class="comment"></span>
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<span class="comment">// 1. Create a Namespace Resolver. This holds a map of namespace prefixes </span>
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<span class="comment">// to namespace URIs.</span>
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<a class="code" href="classAutoRelease.html">AutoRelease<DOMXPathNSResolver></a> resolver(document->createNSResolver(document->getDocumentElement()));
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resolver->addNamespaceBinding(X(<span class="stringliteral">"my"</span>), X(<span class="stringliteral">"http://example.com/myURI"</span>));
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<span class="comment">// **************** Example 1: max() function ****************** //</span>
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{
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<span class="comment">// 2. Create a parsed expression</span>
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<span class="keyword">const</span> <span class="keywordtype">char</span>* expression = <span class="stringliteral">"max(/Catalogue/Book/Price)"</span>;
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<a class="code" href="classAutoRelease.html">AutoRelease<DOMXPathExpression></a> parsedExpression(document->createExpression(X(expression), resolver));
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<span class="comment">// 3. Evaluate the expression. We choose to have a first result, since we</span>
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<span class="comment">// know the answer will have only one item. Could also choose</span>
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<span class="comment">// XPath2Result::SNAPSHOT_RESULT and XPath2Result::ITERATOR_RESULT</span>
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<a class="code" href="classAutoRelease.html">AutoRelease<DOMXPathResult></a> firstResult(parsedExpression->evaluate(document->getDocumentElement(), DOMXPathResult::FIRST_RESULT_TYPE, 0));
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<span class="comment">// 4. Work with the result: output it to the screen in this case</span>
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cout << <span class="stringliteral">"The answer for expression '"</span> << expression << <span class="stringliteral">"' is: "</span> << firstResult->getNumberValue() << endl;
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}
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<span class="comment">// **************** Example 2: output of nodes ****************** //</span>
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{
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<span class="comment">// 2. Create a parsed expression</span>
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<span class="keyword">const</span> <span class="keywordtype">char</span>* expression2 = <span class="stringliteral">"//Magazine"</span>;
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<a class="code" href="classAutoRelease.html">AutoRelease<DOMXPathExpression></a> parsedExpression(document->createExpression(X(expression2), resolver));
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<span class="comment">// 3. Evaluate the expression. We choose to have an iterator result</span>
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<a class="code" href="classAutoRelease.html">AutoRelease<DOMXPathResult></a> iteratorResult(parsedExpression->evaluate(document->getDocumentElement(), DOMXPathResult::ITERATOR_RESULT_TYPE, 0));
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<span class="comment">// 4. Work with the result: output it to the screen in this case</span>
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<span class="comment">// Create a DOMLSSerializer to output the nodes</span>
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<a class="code" href="classAutoRelease.html">AutoRelease<DOMLSSerializer></a> serializer(xqillaImplementation->createLSSerializer());
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<a class="code" href="classAutoRelease.html">AutoRelease<DOMLSOutput></a> output(xqillaImplementation->createLSOutput());
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StdOutFormatTarget target;
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output->setByteStream(&target);
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cout << <span class="stringliteral">"The answer for expression '"</span> << expression2 << <span class="stringliteral">"' is: "</span> <<endl;
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<span class="keywordtype">int</span> i = 0;
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<span class="keywordflow">while</span>(iteratorResult->iterateNext()) {
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<span class="keywordflow">if</span>(iteratorResult->isNode()) {
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cout << <span class="stringliteral">"Node "</span> << i++ << <span class="stringliteral">": "</span><< flush;
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serializer->write(iteratorResult->getNodeValue(), output);
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cout << endl;
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} <span class="keywordflow">else</span> {
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cerr << <span class="stringliteral">"Expected a node but received an atomic value!"</span><< endl;
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}
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}
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}
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}
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<span class="keywordflow">catch</span>(DOMException &e) {
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cerr << <span class="stringliteral">"DOMException: "</span> << UTF8(e.getMessage()) << endl;
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<span class="keywordflow">return</span> 1;
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}
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<span class="comment">// Terminate //</span>
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<span class="comment"></span>
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<a name="a2"></a><a class="code" href="classXQillaPlatformUtils.html#a0bd04a35d4cb26894497c6ff4d8e2105" title="Perform XQilla termination.">XQillaPlatformUtils::terminate</a>();
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<span class="keywordflow">return</span> 0;
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}
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</pre></div> </div>
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</div>
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<hr class="footer"/><address class="footer"><small>Generated on Mon Oct 31 2011 19:08:37 for XQilla DOM Level 3 API by 
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<a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.3 </small></address>
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