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Diffstat (limited to 'sca-cpp/tags/cpp-0.1.incubating-M1-final/sca/tools/scagen/src/org/apache/tuscany/sca/cpp/tools/services/GenericDomNodeHandler.java')
| -rw-r--r-- | sca-cpp/tags/cpp-0.1.incubating-M1-final/sca/tools/scagen/src/org/apache/tuscany/sca/cpp/tools/services/GenericDomNodeHandler.java | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/sca-cpp/tags/cpp-0.1.incubating-M1-final/sca/tools/scagen/src/org/apache/tuscany/sca/cpp/tools/services/GenericDomNodeHandler.java b/sca-cpp/tags/cpp-0.1.incubating-M1-final/sca/tools/scagen/src/org/apache/tuscany/sca/cpp/tools/services/GenericDomNodeHandler.java new file mode 100644 index 0000000000..3f9fb359f5 --- /dev/null +++ b/sca-cpp/tags/cpp-0.1.incubating-M1-final/sca/tools/scagen/src/org/apache/tuscany/sca/cpp/tools/services/GenericDomNodeHandler.java @@ -0,0 +1,214 @@ +/* + * + * Copyright 2005 The Apache Software Foundation or its licensors, as applicable. + * + * Licensed 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.cpp.tools.services; + +import java.io.File; +import java.util.Iterator; +import java.util.Map; +import java.util.Set; +import java.util.Map.Entry; + +import org.apache.tuscany.sca.cpp.tools.common.Utils; +import org.w3c.dom.NamedNodeMap; +import org.w3c.dom.Node; +import org.w3c.dom.NodeList; + +/** + * + * + * + * + */ +public class GenericDomNodeHandler implements DomNodeHandler { + /** + * This method parses the DOM attributes into name value pairs in the + * parameter map each valued keyed by its XPath. + * + * @param node + * the DOM node being processed + * @param contextPath + * the XPath to the DOM node being processed + * @param parameters + * a scratchpad map of name value pairs + */ + public void transferAttrsToParameters(Node node, String contextPath, + Map parameters) { + + if (node == null || contextPath == null || parameters == null) + return; + + NamedNodeMap attrs = node.getAttributes(); + if (attrs != null) { + for (int i = 0; i < attrs.getLength(); i++) { + Node attr = attrs.item(i); + parameters.put(contextPath + "/" + "@" + attr.getNodeName(), + attr.getNodeValue()); + + // Report the dll name to the deployment tool if required. + if ("dll".equals(attr.getNodeName())) { + //This is a path relative to the module root. + //so we need to add it in. + File mod = (File) parameters.get("moduleOrFragmentFile"); + if (null != mod) { + String separatorForRegex = File.separator.replaceAll( + "\\\\", "\\\\\\\\"); + + String end = attr.getNodeValue().replaceAll("[/\\\\]+", + separatorForRegex); + + if (!end.startsWith(File.separator)) { + end = File.separator + end; + } + + String fullPath = mod.getParentFile().getAbsolutePath() + + end; + Utils.postEvent(Utils.DEPLOYMENT_ARTEFACT_ENCOUNTERED, + fullPath); + } + + } + + } + } + return; + } + + /** + * This method will iterate through the DOM node's children and call the + * appropriate handler for each one. + * + * @param node + * the DOM node being processed + * @param contextPath + * the XPath to the DOM node being processed + * @param handlers + * a map of element name to handler objects + * @param parameters + * a scratchpad map of name value pairs + */ + public void handleChildElements(Node node, String contextPath, + Map handlers, Map parameters) { + + if (node == null || contextPath == null) + return; + + NodeList children = node.getChildNodes(); + if (children != null) { + for (int i = 0; i < children.getLength(); i++) { + Node child = children.item(i); + mapNodeToHandlerAndHandle(child, contextPath + "/" + + child.getNodeName(), handlers, parameters); + } + } + return; + } + + /** + * This method will resolve any registered handler for a particular DOM + * element and call the handleNode method on it. If the handlers map has a + * mapping from "entity" to an instance of EntityHandler which implements + * the DomNodeHandler interface then any node that looks like <entity> + * <any_other/><stuff/></entity> + * + * Will be passed to the EntityHandler to process. + * + * @param node + * the DOM node being processed + * @param contextPath + * the XPath to the DOM node being processed + * @param handlers + * a map of element name to handler objects + * @param parameters + * a scratchpad map of name value pairs + */ + public static void mapNodeToHandlerAndHandle(Node node, String contextPath, + Map handlers, Map parameters) { + if (node != null && node.getNodeType() == DomNodeHandler.ELEMENT) { + String nodeName = node.getNodeName(); + if (nodeName != null && nodeName.length() > 0) { + DomNodeHandler handler = (DomNodeHandler) handlers + .get(nodeName); + if (handler != null) { + handler.handleNode(node, contextPath, handlers, parameters); + } + } + } + } + + /** + * This method will place the attributes in this node into the parameter map + * keyed by the XPath and recursively continue processing for any + * sub-elements of the node. + * + * @param node + * The DOM node being consumed + * @param contextXPath + * The XPath to this node + * @param handlers + * The map from element name to node handler + * @param parameters + * A map of parameters - this is often used by a handler to place + * a name-value pair, the name is often an Xpath representation + * of the location of the data in the DOM but handlers are free + * to use whatever they like - the contextXpath is generated as + * an Xpath prefix for those handlers that wish to use it. + */ + public void handleNode(Node node, String contextXPath, Map handlers, + Map parameters) { + + clearParametersAtThisXPath(contextXPath, parameters); + transferAttrsToParameters(node, contextXPath, parameters); + handleChildElements(node, contextXPath, handlers, parameters); + } + + /** + * @param contextXPath + * @param parameters + */ + private void clearParametersAtThisXPath(String contextXPath, Map parameters) { + + // TODO: Slow but works, improve parameters mechanism overall + // to make this unecessary + if (contextXPath == null || parameters == null) { + return; + } + + // We want to clear both /moduleFragment and /module + // subtrees when we come across the root of either.. + if (contextXPath.equals("/moduleFragment")) { + //clear both this and "module" + contextXPath = "/module"; + } + + Set parms = parameters.entrySet(); + if (null != parms) { + Iterator iter = parms.iterator(); + Map.Entry item = null; + String thisKey; + + while (iter.hasNext()) { + item = (Entry) iter.next(); + thisKey = (String) item.getKey(); + if (thisKey.startsWith(contextXPath)) { + //System.out.println(" removing " + thisKey + " for " + + // item.getValue().toString() + " against " + contextXPath); + iter.remove(); + } + } + } + } +}
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