Example usage for javax.xml.xpath XPathFunctionResolver resolveFunction

Introduction

In this page you can find the example usage for javax.xml.xpath XPathFunctionResolver resolveFunction.

Prototype

public XPathFunction resolveFunction(QName functionName, int arity);

Source Link

Document

Find a function in the set of available functions.

If functionName or arity is null, then a NullPointerException is thrown.

Usage

From source file:org.apache.camel.builder.xml.XPathBuilder.java

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);
            }//from   w  w w .  j  a va2s .co  m
            if (answer == null) {
                if (isMatchingNamespaceOrEmptyNamespace(qName.getNamespaceURI(), IN_NAMESPACE)
                        || isMatchingNamespaceOrEmptyNamespace(qName.getNamespaceURI(), DEFAULT_NAMESPACE)) {
                    String localPart = qName.getLocalPart();
                    if (localPart.equals("body") && argumentCount == 0) {
                        return getBodyFunction();
                    }
                    if (localPart.equals("header") && argumentCount == 1) {
                        return getHeaderFunction();
                    }
                }
                if (isMatchingNamespaceOrEmptyNamespace(qName.getNamespaceURI(), OUT_NAMESPACE)) {
                    String localPart = qName.getLocalPart();
                    if (localPart.equals("body") && argumentCount == 0) {
                        return getOutBodyFunction();
                    }
                    if (localPart.equals("header") && argumentCount == 1) {
                        return getOutHeaderFunction();
                    }
                }
                if (isMatchingNamespaceOrEmptyNamespace(qName.getNamespaceURI(), FUNCTION_NAMESPACE)) {
                    String localPart = qName.getLocalPart();
                    if (localPart.equals("properties") && argumentCount == 1) {
                        return getPropertiesFunction();
                    }
                    if (localPart.equals("simple") && argumentCount == 1) {
                        return getSimpleFunction();
                    }
                }
            }
            return answer;
        }
    };
}

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