Examples of net.sf.saxon.query.XQueryExpression

net.sf.saxon.query.XQueryExpression
XQueryExpression represents a compiled query. This object is immutable and thread-safe, the same compiled query may be executed many times in series or in parallel. The object can be created only by using the compileQuery method of the QueryProcessor class.

Various methods are provided for evaluating the query, with different options for delivery of the results.

    public Node evaluateAsDOM(Exchange exchange) throws Exception {
        initialize(exchange);


        DOMResult result = new DOMResult();
        DynamicQueryContext context = createDynamicContext(exchange);
        XQueryExpression expression = getExpression();
        expression.pull(context, result, properties);
        return result.getNode();
    }

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    public Node evaluateAsDOM(Exchange exchange) throws Exception {
        initialize(exchange);


        DOMResult result = new DOMResult();
        DynamicQueryContext context = createDynamicContext(exchange);
        XQueryExpression expression = getExpression();
        expression.pull(context, result, properties);
        return result.getNode();
    }

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    Configuration config = null;
        Properties props = new Properties();
        props.setProperty(OutputKeys.METHOD, "xml");
        props.setProperty(OutputKeys.INDENT, "yes");
    
    XQueryExpression exp = implementation.getCompiledExpressionsCache().get(xqExpression);
    if(exp == null) {
      config = new Configuration();
      StaticQueryContext sqc = new StaticQueryContext(config);
      exp = sqc.compileQuery(xqExpression);
      implementation.getCompiledExpressionsCache().put(xqExpression, exp);
    } else {
      config = exp.getStaticContext().getConfiguration();
    }
    
    Object [] params = prepareParameters(payload, config, props);
    
    DynamicQueryContext dynamicContext = new DynamicQueryContext(config);
    
    // Setting the parameters for function invokation
    String methodName = theMethod.getName();
    for(int i=0; i<params.length; i++) {
      dynamicContext.setParameter(methodName+"_"+i, params[i]);
    }
    
    // Setting references
    for(Map.Entry<String, Object> entry : referenceProxies.entrySet()) {
      dynamicContext.setParameter(entry.getKey(), entry.getValue());
    }
    
    // Setting properties
    for(Map.Entry<String, Object> entry : properties.entrySet()) {
      dynamicContext.setParameter(entry.getKey(), transformProperty(entry.getValue(), config));
    }
        
    SequenceIterator iterator = null;
    Configuration oldConfigValue = SaxonDataBindingHelper.CURR_EXECUTING_CONFIG;
    SaxonDataBindingHelper.CURR_EXECUTING_CONFIG = config;
    try {
      iterator = exp.iterator(dynamicContext);
    } finally {
      SaxonDataBindingHelper.CURR_EXECUTING_CONFIG = oldConfigValue;
    }
        Item item = iterator.next();
        if(item == null) {

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    xqExpression += "\r\n<dummy></dummy>";
    
    Configuration config = new Configuration();
        StaticQueryContext sqc = new StaticQueryContext(config);
        XQueryExpression exp = null;
    try {
      exp = sqc.compileQuery(xqExpression);
    } catch (XPathException e) {
      throw new ContributionResolveException(e);
    }

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    public Node evaluateAsDOM(Exchange exchange) throws Exception {
        initialize(exchange);


        DOMResult result = new DOMResult();
        DynamicQueryContext context = createDynamicContext(exchange);
        XQueryExpression expression = getExpression();
        expression.pull(context, result, properties);
        return result.getNode();
    }

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    public Node evaluateAsDOM(Exchange exchange) throws Exception {
        initialize(exchange);


        DOMResult result = new DOMResult();
        DynamicQueryContext context = createDynamicContext(exchange);
        XQueryExpression expression = getExpression();
        expression.pull(context, result, properties);
        return result.getNode();
    }

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        LOG.debug("evaluateAsDOM: {} for exchange: {}", expression, exchange);
        initialize(exchange);


        DOMResult result = new DOMResult();
        DynamicQueryContext context = createDynamicContext(exchange);
        XQueryExpression expression = getExpression();
        expression.pull(context, result, properties);
        return result.getNode();
    }

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    public Node evaluateAsDOM(Exchange exchange) throws Exception {
        initialize(exchange);


        DOMResult result = new DOMResult();
        DynamicQueryContext context = createDynamicContext(exchange);
        XQueryExpression expression = getExpression();
        expression.pull(context, result, properties);
        return result.getNode();
    }

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    public Node evaluateAsDOM(Exchange exchange) throws Exception {
        initialize(exchange);


        DOMResult result = new DOMResult();
        DynamicQueryContext context = createDynamicContext(exchange);
        XQueryExpression expression = getExpression();
        expression.pull(context, result, properties);
        return result.getNode();
    }

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        // Create a dummy main query module and compile it
        StaticQueryContext sqc = new StaticQueryContext(getConfiguration());
        sqc.setExecutable(getExecutable());
        sqc.setBaseURI(getBaseURI());
        String mainModule = "import module namespace m = \"" + moduleURI + "\" at \"" + href + "\"; ()";
        XQueryExpression exp = sqc.compileQuery(mainModule);
        return exp.getStaticContext();
    }

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