179 lines
14 KiB
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179 lines
14 KiB
HTML
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<title>XQilla DOM3 API Documentation</title>
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<!-- Generated by Doxygen 1.8.5 -->
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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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<div class="header">
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<div class="title">dom-resolver.cpp</div> </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"><div class="line"><span class="comment">/*</span></div>
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<div class="line"><span class="comment"> * Copyright (c) 2001, 2008,</span></div>
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<div class="line"><span class="comment"> * DecisionSoft Limited. All rights reserved.</span></div>
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<div class="line"><span class="comment"> * Copyright (c) 2004, 2018 Oracle and/or its affiliates. All rights reserved.</span></div>
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<div class="line"><span class="comment"> * </span></div>
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<div class="line"><span class="comment"> *</span></div>
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<div class="line"><span class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</span></div>
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<div class="line"><span class="comment"> * you may not use this file except in compliance with the License.</span></div>
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<div class="line"><span class="comment"> * You may obtain a copy of the License at</span></div>
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<div class="line"><span class="comment"> *</span></div>
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<div class="line"><span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div>
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<div class="line"><span class="comment"> *</span></div>
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<div class="line"><span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div>
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<div class="line"><span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span></div>
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<div class="line"><span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
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<div class="line"><span class="comment"> * See the License for the specific language governing permissions and</span></div>
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<div class="line"><span class="comment"> * limitations under the License.</span></div>
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<div class="line"><span class="comment"> */</span></div>
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<div class="line"></div>
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<div class="line"><span class="preprocessor">#include <iostream></span></div>
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<div class="line"></div>
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<div class="line"><span class="preprocessor">#include <<a class="code" href="DOM_8hpp.html">xercesc/dom/DOM.hpp</a>></span></div>
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<div class="line"><span class="preprocessor">#include <xercesc/framework/StdOutFormatTarget.hpp></span></div>
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<div class="line"></div>
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<div class="line"><span class="preprocessor">#include <<a class="code" href="xqilla-dom3_8hpp.html">xqilla/xqilla-dom3.hpp</a>></span></div>
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<div class="line"></div>
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<div class="line">XERCES_CPP_NAMESPACE_USE;</div>
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<div class="line"><span class="keyword">using namespace </span>std;</div>
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<div class="line"></div>
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<div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[])</div>
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<div class="line">{</div>
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<div class="line"> <span class="keywordflow">if</span>(argc != 2) {</div>
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<div class="line"> cerr << <span class="stringliteral">"Data file not specified."</span> << endl;</div>
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<div class="line"> <span class="keywordflow">return</span> 1;</div>
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<div class="line"> }</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// Initialise XQilla //</span></div>
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<div class="line"><span class="comment"></span></div>
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<div class="line"> <span class="comment">// 1. Initialize XQilla</span></div>
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<div class="line"> <span class="comment">//</span></div>
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<div class="line"> <span class="comment">// Note that this initialisation takes care of initialising</span></div>
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<div class="line"> <span class="comment">// xerces-c as well</span></div>
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<div class="line"> <span class="keywordflow">try</span> {</div>
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<div class="line"> </div>
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<div class="line"> <a name="a0"></a><a class="code" href="classXQillaPlatformUtils.html#ac769d09556ec43ecb94d1822783ba0b8">XQillaPlatformUtils::initialize</a>();</div>
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<div class="line"> </div>
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<div class="line"> } <span class="keywordflow">catch</span> (<span class="keyword">const</span> XMLException& eXerces) {</div>
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<div class="line"> cerr << <span class="stringliteral">"Error during Xerces-C initialisation.\n"</span></div>
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<div class="line"> << <span class="stringliteral">"Xerces exception message: "</span></div>
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<div class="line"> << UTF8(eXerces.getMessage()) << endl;</div>
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<div class="line"> <span class="keywordflow">return</span> 1;</div>
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<div class="line"> }</div>
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<div class="line"></div>
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<div class="line"> <span class="keywordflow">try</span> {</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// 2. Obtain a DOM3 XPath2 implementation. This is a XQilla-specific </span></div>
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<div class="line"> <span class="comment">// implementation that overrides the standard DOMDocument, the standard </span></div>
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<div class="line"> <span class="comment">// DOMWriter and the standard DOMBuilder</span></div>
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<div class="line"> DOMImplementation* xqillaImplementation = </div>
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<div class="line"> DOMImplementationRegistry::getDOMImplementation(X(<span class="stringliteral">"XPath2 3.0"</span>));</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// 3. Obtain a parser and set 'do namespaces', 'use schema' and 'validate' to </span></div>
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<div class="line"> <span class="comment">// true.</span></div>
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<div class="line"> <span class="comment">// Create a DOMLSParser object</span></div>
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<div class="line"> <a name="_a1"></a><a class="code" href="classAutoRelease.html">AutoRelease<DOMLSParser></a> parser(xqillaImplementation->createLSParser(DOMImplementationLS::MODE_SYNCHRONOUS, 0));</div>
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<div class="line"> parser->getDomConfig()->setParameter(XMLUni::fgDOMNamespaces, <span class="keyword">true</span>);</div>
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<div class="line"> parser->getDomConfig()->setParameter(XMLUni::fgXercesSchema, <span class="keyword">true</span>);</div>
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<div class="line"> parser->getDomConfig()->setParameter(XMLUni::fgDOMValidateIfSchema, <span class="keyword">true</span>);</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// Parse our XML document //</span></div>
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<div class="line"><span class="comment"></span> </div>
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<div class="line"> DOMDocument *document = parser->parseURI(argv[1]);</div>
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<div class="line"> <span class="keywordflow">if</span>(document == 0) {</div>
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<div class="line"> cerr << <span class="stringliteral">"Document not found: "</span> << argv[1] << endl;</div>
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<div class="line"> <span class="keywordflow">return</span> 1;</div>
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<div class="line"> }</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// Create a parsed expression //</span></div>
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<div class="line"> <span class="comment">// (compiled) and evaluate it //</span></div>
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<div class="line"><span class="comment"></span></div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// 1. Create a Namespace Resolver. This holds a map of namespace prefixes </span></div>
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<div class="line"> <span class="comment">// to namespace URIs.</span></div>
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<div class="line"> <a class="code" href="classAutoRelease.html">AutoRelease<DOMXPathNSResolver></a> resolver(document->createNSResolver(document->getDocumentElement()));</div>
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<div class="line"> resolver->addNamespaceBinding(X(<span class="stringliteral">"my"</span>), X(<span class="stringliteral">"http://example.com/myURI"</span>));</div>
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<div class="line"> </div>
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<div class="line"> <span class="comment">// **************** Example 1: max() function ****************** //</span></div>
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<div class="line"></div>
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<div class="line"> { </div>
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<div class="line"> <span class="comment">// 2. Create a parsed expression</span></div>
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<div class="line"> <span class="keyword">const</span> <span class="keywordtype">char</span>* expression = <span class="stringliteral">"max(/Catalogue/Book/Price)"</span>;</div>
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<div class="line"> <a class="code" href="classAutoRelease.html">AutoRelease<DOMXPathExpression></a> parsedExpression(document->createExpression(X(expression), resolver));</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// 3. Evaluate the expression. We choose to have a first result, since we</span></div>
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<div class="line"> <span class="comment">// know the answer will have only one item. Could also choose</span></div>
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<div class="line"> <span class="comment">// XPath2Result::SNAPSHOT_RESULT and XPath2Result::ITERATOR_RESULT</span></div>
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<div class="line"> <a class="code" href="classAutoRelease.html">AutoRelease<DOMXPathResult></a> firstResult(parsedExpression->evaluate(document->getDocumentElement(), DOMXPathResult::FIRST_RESULT_TYPE, 0));</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// 4. Work with the result: output it to the screen in this case</span></div>
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<div class="line"> cout << <span class="stringliteral">"The answer for expression '"</span> << expression << <span class="stringliteral">"' is: "</span> << firstResult->getNumberValue() << endl;</div>
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<div class="line"> }</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// **************** Example 2: output of nodes ****************** //</span></div>
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<div class="line"></div>
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<div class="line"> {</div>
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<div class="line"> <span class="comment">// 2. Create a parsed expression</span></div>
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<div class="line"> <span class="keyword">const</span> <span class="keywordtype">char</span>* expression2 = <span class="stringliteral">"//Magazine"</span>;</div>
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<div class="line"> <a class="code" href="classAutoRelease.html">AutoRelease<DOMXPathExpression></a> parsedExpression(document->createExpression(X(expression2), resolver));</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// 3. Evaluate the expression. We choose to have an iterator result</span></div>
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<div class="line"> <a class="code" href="classAutoRelease.html">AutoRelease<DOMXPathResult></a> iteratorResult(parsedExpression->evaluate(document->getDocumentElement(), DOMXPathResult::ITERATOR_RESULT_TYPE, 0));</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// 4. Work with the result: output it to the screen in this case</span></div>
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<div class="line"> </div>
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<div class="line"> <span class="comment">// Create a DOMLSSerializer to output the nodes</span></div>
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<div class="line"> <a class="code" href="classAutoRelease.html">AutoRelease<DOMLSSerializer></a> serializer(xqillaImplementation->createLSSerializer());</div>
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<div class="line"> <a class="code" href="classAutoRelease.html">AutoRelease<DOMLSOutput></a> output(xqillaImplementation->createLSOutput());</div>
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<div class="line"> StdOutFormatTarget target;</div>
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<div class="line"> output->setByteStream(&target);</div>
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<div class="line"></div>
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<div class="line"> cout << <span class="stringliteral">"The answer for expression '"</span> << expression2 << <span class="stringliteral">"' is: "</span> <<endl;</div>
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<div class="line"></div>
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<div class="line"> <span class="keywordtype">int</span> i = 0;</div>
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<div class="line"> <span class="keywordflow">while</span>(iteratorResult->iterateNext()) {</div>
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<div class="line"> <span class="keywordflow">if</span>(iteratorResult->isNode()) {</div>
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<div class="line"> cout << <span class="stringliteral">"Node "</span> << i++ << <span class="stringliteral">": "</span><< flush;</div>
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<div class="line"> serializer->write(iteratorResult->getNodeValue(), output);</div>
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<div class="line"> cout << endl;</div>
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<div class="line"> } <span class="keywordflow">else</span> {</div>
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<div class="line"> cerr << <span class="stringliteral">"Expected a node but received an atomic value!"</span><< endl;</div>
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<div class="line"> }</div>
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<div class="line"> }</div>
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<div class="line"> }</div>
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<div class="line"></div>
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<div class="line"> }</div>
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<div class="line"> <span class="keywordflow">catch</span>(DOMException &e) {</div>
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<div class="line"> cerr << <span class="stringliteral">"DOMException: "</span> << UTF8(e.getMessage()) << endl;</div>
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<div class="line"> <span class="keywordflow">return</span> 1;</div>
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<div class="line"> }</div>
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<div class="line"></div>
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<div class="line"> <span class="comment">// Terminate //</span></div>
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<div class="line"><span class="comment"></span></div>
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<div class="line"> <a name="a2"></a><a class="code" href="classXQillaPlatformUtils.html#a0bd04a35d4cb26894497c6ff4d8e2105">XQillaPlatformUtils::terminate</a>();</div>
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<div class="line"> </div>
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<div class="line"> <span class="keywordflow">return</span> 0;</div>
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<div class="line">}</div>
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