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-rw-r--r--sca-java-2.x/tags/2.0-Beta2-RC1/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/policy/xml/PolicyXPathFunction.java295
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diff --git a/sca-java-2.x/tags/2.0-Beta2-RC1/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/policy/xml/PolicyXPathFunction.java b/sca-java-2.x/tags/2.0-Beta2-RC1/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/policy/xml/PolicyXPathFunction.java
deleted file mode 100644
index 8e2d7f9e60..0000000000
--- a/sca-java-2.x/tags/2.0-Beta2-RC1/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/policy/xml/PolicyXPathFunction.java
+++ /dev/null
@@ -1,295 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-package org.apache.tuscany.sca.policy.xml;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Set;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-import javax.xml.XMLConstants;
-import javax.xml.namespace.NamespaceContext;
-import javax.xml.namespace.QName;
-import javax.xml.xpath.XPathFunction;
-import javax.xml.xpath.XPathFunctionException;
-
-import org.w3c.dom.Document;
-import org.w3c.dom.Node;
-import org.w3c.dom.NodeList;
-
-/**
- * The SCA-defined XPath function
- */
-public class PolicyXPathFunction implements XPathFunction {
- private static Logger logger = Logger.getLogger(PolicyXPathFunction.class.getName());
-
- static final QName InterfaceRef = new QName(PolicyConstants.SCA11_NS, "InterfaceRef");
- static final QName OperationRef = new QName(PolicyConstants.SCA11_NS, "OperationRef");
- static final QName MessageRef = new QName(PolicyConstants.SCA11_NS, "MessageRef");
- static final QName IntentRefs = new QName(PolicyConstants.SCA11_NS, "IntentRefs");
- static final QName URIRef = new QName(PolicyConstants.SCA11_NS, "URIRef");
-
- static final Set<QName> functions =
- new HashSet<QName>(Arrays.asList(InterfaceRef, OperationRef, MessageRef, IntentRefs, URIRef));
-
- private NamespaceContext namespaceContext;
- private final QName functionName;
-
- public PolicyXPathFunction(NamespaceContext namespaceContext, QName functionName) {
- super();
- this.namespaceContext = namespaceContext;
- this.functionName = functionName;
- }
-
- private Node getContextNode(List args) {
- if (args.size() >= 2) {
- NodeList nodeList = (NodeList)args.get(1);
- if (nodeList.getLength() > 0) {
- return nodeList.item(0);
- }
- }
- return null;
- }
-
- public Object evaluate(List args) throws XPathFunctionException {
- if (logger.isLoggable(Level.FINE)) {
- logger.fine(functionName + "(" + args + ")");
- }
-
- String arg = (String)args.get(0);
- Node node = getContextNode(args);
- /**
- * If the xpath expression that contains the function does not select any nodes
- * (eg IntentRefs('someIntent')), the context node passed in will be a Document.
- * In this case we need to iterate over every Node in the Document and evaluate it.
- *
- * If the xpath expression does select nodes (eg //sca:component[IntentRefs('someIntent')])
- * then xpath will call evaluate for each node and we only need to return the result for that
- * node.
- */
- if ( node instanceof Document )
- return evaluateDocument(arg, (Document)node);
- else
- return evaluateNode(arg, node);
- }
-
- public Object evaluateNode(String arg, Node node) {
- if (InterfaceRef.equals(functionName)) {
- return evaluateInterface(arg, node);
- } else if (OperationRef.equals(functionName)) {
- String[] params = arg.split("/");
- if (params.length != 2) {
- throw new IllegalArgumentException("Invalid argument: " + arg);
- }
- String interfaceName = params[0];
- String operationName = params[1];
- return evaluateOperation(interfaceName, operationName, node);
- } else if (MessageRef.equals(functionName)) {
- String[] params = arg.split("/");
- if (params.length != 3) {
- throw new IllegalArgumentException("Invalid argument: " + arg);
- }
- String interfaceName = params[0];
- String operationName = params[1];
- String messageName = params[2];
- return evaluateMessage(interfaceName, operationName, messageName, node);
- } else if (URIRef.equals(functionName)) {
- return evaluateURI(arg, node);
- } else if (IntentRefs.equals(functionName)) {
- String[] intents = arg.split("(\\s)+");
- return evaluateIntents(intents, node);
- } else {
- return Boolean.FALSE;
- }
- }
-
- private class NodeListImpl implements NodeList {
-
- private ArrayList<Node> list;
-
- public NodeListImpl() {
- this.list = new ArrayList<Node>();
- }
- public int getLength() {
- return this.list.size();
- }
-
- public Node item(int index) {
- return this.list.get(index);
- }
- public boolean add(Node node) {
- return this.list.add(node);
-
- }
-
- }
- private Object evaluateDocument(String arg, Document doc) {
- NodeListImpl retList = new NodeListImpl();
- NodeList elements = doc.getElementsByTagName("*");
- for ( int i=0; i < elements.getLength(); i++) {
- Object node = evaluateNode(arg, elements.item(i));
- if ( node != null )
- retList.add((Node)node);
- }
- return retList;
- }
-
- private Boolean evaluateInterface(String interfaceName, Node node) {
- return Boolean.FALSE;
- }
-
- private Boolean evaluateOperation(String interfaceName, String operationName, Node node) {
- return Boolean.FALSE;
- }
-
- private Boolean evaluateMessage(String interfaceName, String operationName, String messageName, Node node) {
- return Boolean.FALSE;
- }
-
- private Boolean evaluateURI(String uri, Node node) {
- return Boolean.FALSE;
- }
-
- /**
- * Evaluates a single node for the given intents.
- * @param intents
- * @param node
- * @return
- */
- private Object evaluateIntents(String[] intents, Node node) {
- if ( node == null )
- return false;
-
- if ( node.getAttributes() != null ) {
- for ( int i=0; i < node.getAttributes().getLength(); i++) {
- Node attr = node.getAttributes().item(i);
-
- if ( "requires".equalsIgnoreCase(attr.getNodeName())) {
-
- for ( int j = 0; j < intents.length; j++ ) {
- // Check negative intents
- if ( intents[j].startsWith("!")) {
- if ( matchIntent(intents[j].substring(1), attr, node.getNamespaceURI()))
- return null;
- } else if ( !matchIntent(intents[j], attr, node.getNamespaceURI())){
- return null;
- }
- }
- return node;
- }
-
- }
- }
-
- return null;
- }
-
-
-
- /**
- * Determine whether the given intent is present in the "requires" attribute
- * @param intent
- * @param node
- * @param namespaceURI
- * @return
- */
- private boolean matchIntent(String intent, Node node, String namespaceURI) {
- String[] requires = node.getNodeValue().split("(\\s)+");
- QName intentName = getStringAsQName(intent);
-
-
- for ( int i=0; i < requires.length; i++ ) {
- QName nodeName = null;
- int idx = requires[i].indexOf(':');
-
- // No prefix specified
- if ( idx == -1 ) {
- nodeName = new QName(namespaceURI, requires[i]);
- } else {
- String prefix = requires[i].substring(0, idx);
- String name = requires[i].substring(idx + 1);
- String ns = node.lookupNamespaceURI(prefix);
- nodeName = new QName(ns, name, prefix);
- }
- if ( intentName.equals(nodeName))
- return true;
- }
- return false;
- }
-
-
- private QName getStringAsQName(String intent) {
- int idx = intent.indexOf(':');
- if (idx == -1)
- return new QName(namespaceContext.getNamespaceURI(XMLConstants.DEFAULT_NS_PREFIX), intent);
-
- String prefix = intent.substring(0, idx);
- intent = intent.substring(idx + 1);
-
- return new QName(namespaceContext.getNamespaceURI(prefix), intent, prefix);
-
- }
-
-
- private static Pattern FUNCTION;
- static {
- String functionPattern = "(URIRef|InterfaceRef|OperationRef|MessageRef|IntentRefs)\\s*\\(([^\\)]*)\\)";
- FUNCTION = Pattern.compile(functionPattern);
- }
-
- /** Adds the node as an argument to the XPath function.
- * Required in order to have access to the NodeList within the function
- */
- public static String normalize(String attachTo, String scaPrefix) {
- // Get rid of any whitespace
- attachTo = attachTo.trim();
-
- Matcher matcher = FUNCTION.matcher(attachTo);
- boolean result = matcher.find();
- if (result) {
- StringBuffer sb = new StringBuffer();
- do {
- String function = matcher.group(1);
- String args = matcher.group(2);
- if ( (matcher.start() == 0) || (attachTo.charAt( matcher.start() -1) != ':' )) {
- function = scaPrefix + ":" + function;
- }
- String replacement = null;
- if (args.trim().length() > 0) {
- replacement = function + "(" + args + "," + "self::node())";
- } else {
- replacement = function + "(self::node())";
- }
- matcher.appendReplacement(sb, replacement);
- result = matcher.find();
- } while (result);
-
- matcher.appendTail(sb);
- return sb.toString();
- }
- return attachTo;
- }
-
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-29 10:41:33 +0000