Examples of javax.xml.xpath.XPath.evaluate()

javax.xml.xpath.XPath.evaluate()

Evaluate an XPath expression in the specified context and return the result as the specified type.

See Evaluation of XPath Expressions for context item evaluation, variable, function and QName resolution and return type conversion.

If returnType is not one of the types defined in {@link XPathConstants} ({@link XPathConstants#NUMBER NUMBER}, {@link XPathConstants#STRING STRING}, {@link XPathConstants#BOOLEAN BOOLEAN}, {@link XPathConstants#NODE NODE} or{@link XPathConstants#NODESET NODESET}) then an IllegalArgumentException is thrown.

If a null value is provided for item, an empty document will be used for the context. If expression or returnType is null, then a NullPointerException is thrown.
@param expression The XPath expression. @param item The starting context (node or node list, for example). @param returnType The desired return type. @return Result of evaluating an XPath expression as an Object of returnType. @throws XPathExpressionException If expression cannot be evaluated. @throws IllegalArgumentException If returnType is not one of the types defined in {@link XPathConstants}. @throws NullPointerException If expression or returnType is null.

          Node anode = (Node)xpath.evaluate(expression, node, XPathConstants.NODE);
          Analyzer queryAnalyzer = readAnalyzer(anode);


          // An analyzer without a type specified, or with type="index"
          expression = "./analyzer[not(@type)] | ./analyzer[@type='index']";
          anode = (Node)xpath.evaluate(expression, node, XPathConstants.NODE);
          Analyzer analyzer = readAnalyzer(anode);


          if (queryAnalyzer==null) queryAnalyzer=analyzer;
          if (analyzer==null) analyzer=queryAnalyzer;
          if (analyzer!=null) {

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        }
      };
      


      String expression = "/schema/types/fieldtype | /schema/types/fieldType";
      NodeList nodes = (NodeList) xpath.evaluate(expression, document, XPathConstants.NODESET);
      fieldLoader.load( loader, nodes );


      


      // Hang on to the fields that say if they are required -- this lets us set a reasonable default for the unique key

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      // Hang on to the fields that say if they are required -- this lets us set a reasonable default for the unique key
      Map<String,Boolean> explicitRequiredProp = new HashMap<String, Boolean>();
      ArrayList<DynamicField> dFields = new ArrayList<DynamicField>();
      expression = "/schema/fields/field | /schema/fields/dynamicField";
      nodes = (NodeList) xpath.evaluate(expression, document, XPathConstants.NODESET);


      for (int i=0; i<nodes.getLength(); i++) {
        Node node = nodes.item(i);


        NamedNodeMap attrs = node.getAttributes();

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    // stuff it in a normal array for faster access
    dynamicFields = dFields.toArray(new DynamicField[dFields.size()]);




    Node node = (Node) xpath.evaluate("/schema/similarity", document, XPathConstants.NODE);
    if (node==null) {
      similarityFactory = new SimilarityFactory() {
        @Override
        public Similarity getSimilarity() {
          return Similarity.getDefault();

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        schemaAware.add((SchemaAware) similarityFactory);
      }
      log.debug("using similarity factory" + similarityFactory.getClass().getName());
    }


    node = (Node) xpath.evaluate("/schema/defaultSearchField/text()", document, XPathConstants.NODE);
    if (node==null) {
      log.warn("no default search field specified in schema.");
    } else {
      defaultSearchFieldName=node.getNodeValue().trim();
      // throw exception if specified, but not found or not indexed

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        }
      }
      log.info("default search field is "+defaultSearchFieldName);
    }


    node = (Node) xpath.evaluate("/schema/solrQueryParser/@defaultOperator", document, XPathConstants.NODE);
    if (node==null) {
      log.debug("using default query parser operator (OR)");
    } else {
      queryParserDefaultOperator=node.getNodeValue().trim();
      log.info("query parser default operator is "+queryParserDefaultOperator);

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    } else {
      queryParserDefaultOperator=node.getNodeValue().trim();
      log.info("query parser default operator is "+queryParserDefaultOperator);
    }


    node = (Node) xpath.evaluate("/schema/uniqueKey/text()", document, XPathConstants.NODE);
    if (node==null) {
      log.warn("no uniqueKey specified in schema.");
    } else {
      uniqueKeyField=getIndexedField(node.getNodeValue().trim());
      if (!uniqueKeyField.stored()) {

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    // Map<String,ArrayList<SchemaField>> cfields = new HashMap<String,ArrayList<SchemaField>>();
    // expression = "/schema/copyField";
    
    dynamicCopyFields = new DynamicCopy[] {};
    expression = "//copyField";
    nodes = (NodeList) xpath.evaluate(expression, document, XPathConstants.NODESET);


      for (int i=0; i<nodes.getLength(); i++) {
        node = nodes.item(i);
        NamedNodeMap attrs = node.getAttributes();

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      @Override
      protected CharFilterFactory register(String name, CharFilterFactory plugin) throws Exception {
        return null; // used for map registration
      }
    };
    charFilterLoader.load( solrConfig.getResourceLoader(), (NodeList)xpath.evaluate("./charFilter", node, XPathConstants.NODESET) );


    // Load the Tokenizer
    // Although an analyzer only allows a single Tokenizer, we load a list to make sure
    // the configuration is ok
    // --------------------------------------------------------------------------------

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      @Override
      protected TokenizerFactory register(String name, TokenizerFactory plugin) throws Exception {
        return null; // used for map registration
      }
    };
    tokenizerLoader.load( loader, (NodeList)xpath.evaluate("./tokenizer", node, XPathConstants.NODESET) );
    
    // Make sure something was loaded
    if( tokenizers.isEmpty() ) {
      throw new SolrException(SolrException.ErrorCode.SERVER_ERROR,"analyzer without class or tokenizer & filter list");
    }

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