Examples of javax.xml.xpath.XPathFunction

javax.xml.xpath.XPathFunction

XPathFunction provides access to XPath functions.

Functions are identified by QName and arity in XPath.
@author Norman Walsh @author Jeff Suttor @version $Revision: 226183 $, $Date: 2005-04-08 06:39:14 -0400 (Fri, 08 Apr 2005) $ @since 1.5

                String fmsg = XSLMessages.createXPATHMessage(
                    XPATHErrorResources.ER_EXTENSION_FUNCTION_CANNOT_BE_INVOKED,                    new Object[] { myQName.toString() } );
                throw new XPathFunctionException ( fmsg );
            }


            XPathFunction xpathFunction = 
                resolver.resolveFunction( myQName, arity );


            ArrayList argList = new ArrayList( arity);
            for ( int i=0; i<arity; i++ ) {
                Object argument = argVec.elementAt( i );
                // XNodeSet object() returns NodeVector and not NodeList
                // Explicitly getting NodeList by using nodelist()
                if ( argument instanceof XNodeSet ) {
                    argList.add ( i, ((XNodeSet)argument).nodelist() );
                } else if ( argument instanceof XObject ) {
                    Object passedArgument = ((XObject)argument).object();
                    argList.add ( i, passedArgument );
                } else {
                    argList.add ( i, argument );
                }
            }
       
            return ( xpathFunction.evaluate ( argList ));


        } catch ( XPathFunctionException xfe ) {
            // If we get XPathFunctionException then we want to terminate 
            // further execution by throwing WrappedRuntimeException
            throw new org.apache.xml.utils.WrappedRuntimeException ( xfe );

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        getNamespaceContext().setNamespaces(namespaces);
    }


    public XPathFunction getBodyFunction() {
        if (bodyFunction == null) {
            bodyFunction = new XPathFunction() {
                public Object evaluate(List list) throws XPathFunctionException {
                    if (exchange == null) {
                        return null;
                    }
                    return exchange.get().getIn().getBody();

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        this.bodyFunction = bodyFunction;
    }


    public XPathFunction getHeaderFunction() {
        if (headerFunction == null) {
            headerFunction = new XPathFunction() {
                public Object evaluate(List list) throws XPathFunctionException {
                    if (exchange != null && !list.isEmpty()) {
                        Object value = list.get(0);
                        if (value != null) {
                            String text = exchange.get().getContext().getTypeConverter().convertTo(String.class, value);

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        this.headerFunction = headerFunction;
    }


    public XPathFunction getOutBodyFunction() {
        if (outBodyFunction == null) {
            outBodyFunction = new XPathFunction() {
                public Object evaluate(List list) throws XPathFunctionException {
                    if (exchange.get() != null && exchange.get().hasOut()) {
                        return exchange.get().getOut().getBody();
                    }
                    return null;

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        this.outBodyFunction = outBodyFunction;
    }


    public XPathFunction getOutHeaderFunction() {
        if (outHeaderFunction == null) {
            outHeaderFunction = new XPathFunction() {                
                public Object evaluate(List list) throws XPathFunctionException {
                    if (exchange.get() != null && !list.isEmpty()) {
                        Object value = list.get(0);
                        if (value != null) {
                            String text = exchange.get().getContext().getTypeConverter().convertTo(String.class, value);

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        this.outHeaderFunction = outHeaderFunction;
    }


    public XPathFunction getPropertiesFunction() {
        if (propertiesFunction == null) {
            propertiesFunction = new XPathFunction() {
                public Object evaluate(List list) throws XPathFunctionException {
                    if (exchange != null && !list.isEmpty()) {
                        Object value = list.get(0);
                        if (value != null) {
                            String text = exchange.get().getContext().getTypeConverter().convertTo(String.class, value);

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        this.propertiesFunction = propertiesFunction;
    }


    public XPathFunction getSimpleFunction() {
        if (simpleFunction == null) {
            simpleFunction = new XPathFunction() {
                public Object evaluate(List list) throws XPathFunctionException {
                    if (exchange != null && !list.isEmpty()) {
                        Object value = list.get(0);
                        if (value != null) {
                            String text = exchange.get().getContext().getTypeConverter().convertTo(String.class, value);

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    }


    protected XPathFunctionResolver createDefaultFunctionResolver(final XPathFunctionResolver parent) {
        return new XPathFunctionResolver() {
            public XPathFunction resolveFunction(QName qName, int argumentCount) {
                XPathFunction answer = null;
                if (parent != null) {
                    answer = parent.resolveFunction(qName, argumentCount);
                }
                if (answer == null) {
                    if (isMatchingNamespaceOrEmptyNamespace(qName.getNamespaceURI(), IN_NAMESPACE)

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        getNamespaceContext().setNamespaces(namespaces);
    }


    public XPathFunction getBodyFunction() {
        if (bodyFunction == null) {
            bodyFunction = new XPathFunction() {
                @SuppressWarnings("rawtypes")
                public Object evaluate(List list) throws XPathFunctionException {
                    if (exchange == null) {
                        return null;
                    }

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        this.bodyFunction = bodyFunction;
    }


    public XPathFunction getHeaderFunction() {
        if (headerFunction == null) {
            headerFunction = new XPathFunction() {
                @SuppressWarnings("rawtypes")
                public Object evaluate(List list) throws XPathFunctionException {
                    if (exchange != null && !list.isEmpty()) {
                        Object value = list.get(0);
                        if (value != null) {

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