Examples of org.apache.synapse.util.xpath.SynapseXPath

org.apache.synapse.util.xpath.SynapseXPath

XPath that has been used inside Synapse xpath processing. This has a extension function named get-property which is use to retrieve message context properties with the given name from the function

For example the following function get-property('prop') can be evaluatedd using an XPath to retrieve the message context property value with the name prop.

Apart from that this XPath has a certain set of XPath variables associated with it. They are as follows;

body

The SOAP 1.1 or 1.2 body element.

header

The SOAP 1.1 or 1.2 header element.

Also there are some XPath prefixes defined in SynapseXPath to access various properties using XPath variables, where the variable name represents the particular prefix and the property name as the local part of the variable. Those variables are;

ctx

Prefix for Synapse MessageContext properties

axis2

Prefix for Axis2 MessageContext properties

trp

Prefix for the transport headers

This XPath is Thread Safe, and provides a special set of evaluate functions for the MessageContext and SOAPEnvelope as well as a method to retrieve string values of the evaluated XPaths
@see org.apache.axiom.om.xpath.AXIOMXPath @see #getContext(Object) @see org.apache.synapse.util.xpath.SynapseXPathFunctionContext @see org.apache.synapse.util.xpath.SynapseXPathVariableContext


        // create a new switch mediator
        XSLTMediator transformMediator = new XSLTMediator();


        // set xpath condition to select source
        SynapseXPath xpath = new SynapseXPath("//m0:CheckPriceRequest");
        xpath.addNamespace("m0", "http://services.samples/xsd");
        transformMediator.setSource(xpath);


        // set XSLT transformation URL
        setXsltTransformationURL(transformMediator, "xslt-key");

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    private void testMultipleKeys(int num) throws Exception {


        String xsltKeyValue = null;


        String path;
        SynapseXPath xpath;
        Value xsltKey;
        XSLTMediator transformMediator = new XSLTMediator();


        //default source, xsltFile, and state of key (dynamic or static)
        String source = "";
        String xsltFile = "";
        boolean isDynamicKey = true;


        // based on source, different XSLTFiles can be used
        if (num == 0) {
            source = SOURCE_STATIC_KEY;
            xsltFile = "static_key.xslt";
            xsltKeyValue = "StaticXsltKey";
            isDynamicKey = false;


        } else if (num == 1) {
            source = SOURCE_DYNAMIC_KEY1;
            xsltFile = "dynamic_key_1.xslt";
            xsltKeyValue = "DynamicXsltKey1";
            isDynamicKey = true;
        } else if (num == 2) {
            source = SOURCE_DYNAMIC_KEY2;
            xsltFile = "dynamic_key_2.xslt";
            xsltKeyValue = "DynamicXsltKey2";
            isDynamicKey = true;
        }


        if (isDynamicKey) {
            path = "//m0:CheckPriceRequest/m0:" + xsltKeyValue;
            xpath = new SynapseXPath(path);
            xpath.addNamespace("m0", "http://services.samples/xsd");


            // Create key from dynamic key (xpath)
            xsltKey = new Value(xpath);
            // set XSLT transformation URL (Xpath)
            transformMediator.setXsltKey(xsltKey);

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        OMElement pool;


        try {
            // get the 'pool' element and determine if we need to create a DataSource or
            // lookup using JNDI
            SynapseXPath xpath = new SynapseXPath("self::node()/syn:connection/syn:pool");
            xpath.addNamespace("syn", XMLConfigConstants.SYNAPSE_NAMESPACE);
            pool = (OMElement) xpath.selectSingleNode(elem);
            if (pool.getFirstChildWithName(DSNAME_Q) != null) {
                readLookupConfig(mediator, pool);
            } else if (pool.getFirstChildWithName(DRIVER_Q) != null) {
                readCustomDataSourceConfig(pool, mediator);
            } else {

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                String xpath = getAttribute(paramElt, ATT_EXPRN);
                String value = getAttribute(paramElt, ATT_VALUE);


                if (xpath != null || value != null) {


                    SynapseXPath xp = null;
                    if (xpath != null) {
                        try {
                            xp = SynapseXPathFactory.getSynapseXPath(paramElt, ATT_EXPRN);


                        } catch (JaxenException e) {

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public class SynapseXPathTest extends TestCase {


    String message = "This is XPath test";    


    public void testStringXPath() throws Exception {
        SynapseXPath xpath = SynapseXPath.parseXPathString("$body//{http://somens}test");
        MessageContext ctx =  TestUtils.getTestContext("<m0:test xmlns:m0=\"http://somens\">" + message + "</m0:test>");
        assertEquals(message, xpath.stringValueOf(ctx));
    }

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        MessageContext ctx =  TestUtils.getTestContext("<m0:test xmlns:m0=\"http://somens\">" + message + "</m0:test>");
        assertEquals(message, xpath.stringValueOf(ctx));
    }


    public void testStringXPath2() throws Exception {
        SynapseXPath xpath = SynapseXPath.parseXPathString("$body//{http://somens}test/{http://someother}another");
        MessageContext ctx =  TestUtils.getTestContext("<m0:test xmlns:m0=\"http://somens\"><m1:another xmlns:m1=\"http://someother\">" + message + "</m1:another></m0:test>");
        assertEquals(message, xpath.stringValueOf(ctx));
    }

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        MessageContext ctx =  TestUtils.getTestContext("<m0:test xmlns:m0=\"http://somens\"><m1:another xmlns:m1=\"http://someother\">" + message + "</m1:another></m0:test>");
        assertEquals(message, xpath.stringValueOf(ctx));
    }


    public void testAbsoluteXPath() throws Exception {
        SynapseXPath xpath = new SynapseXPath("//test");
        MessageContext ctx =  TestUtils.getTestContext("<test>" + message + "</test>");
        assertEquals(message, xpath.stringValueOf(ctx));
    }

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        MessageContext ctx =  TestUtils.getTestContext("<test>" + message + "</test>");
        assertEquals(message, xpath.stringValueOf(ctx));
    }


    public void testBodyRelativeXPath() throws Exception {
        SynapseXPath xpath = new SynapseXPath("$body/test");
        MessageContext ctx =  TestUtils.getTestContext("<test>" + message + "</test>");
        assertEquals(message, xpath.stringValueOf(ctx));
        Object node = xpath.selectSingleNode(ctx);
        assertTrue(node instanceof OMElement);
        assertEquals(message, ((OMElement)node).getText());
    }

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        OMFactory fac = ctx.getEnvelope().getOMFactory();
        OMNamespace ns = fac.createOMNamespace("http://test", "t");
        ctx.getEnvelope().getHeader().addHeaderBlock("test", ns).setText(message);
        ctx.getEnvelope().getHeader().addHeaderBlock("test2", ns);
        
        SynapseXPath xpath = new SynapseXPath("$header/t:test");
        xpath.addNamespace(ns);
        assertEquals(message, xpath.stringValueOf(ctx));
        
        xpath = new SynapseXPath("$header/*");
        assertEquals(2, xpath.selectNodes(ctx).size());
    }

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        xpath = new SynapseXPath("$header/*");
        assertEquals(2, xpath.selectNodes(ctx).size());
    }


    public void testContextProperties() throws Exception {
        SynapseXPath xpath = new SynapseXPath("$ctx:test");
        MessageContext synCtx = new TestMessageContext();
        synCtx.setProperty("test", message);
        assertEquals(xpath.evaluate(synCtx), message);
    }

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org.apache.axiom.soap.SOAPEnvelope

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org.apache.synapse.config.xml.POJOCommandMediatorFactory

org.apache.synapse.config.xml.SynapseXMLConfigurationFactory

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