Java tutorial
/* * Copyright (c) 2006, WSO2 Inc. (http://www.wso2.org) All Rights Reserved. * * 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.wso2.carbon.governance.lcm.util; import org.apache.axiom.om.OMAbstractFactory; import org.apache.axiom.om.OMElement; import org.apache.axiom.om.OMFactory; import org.apache.axiom.om.util.AXIOMUtil; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.commons.scxml.io.SCXMLParser; import org.wso2.carbon.governance.lcm.beans.*; import org.wso2.carbon.registry.core.Registry; import org.wso2.carbon.registry.core.Resource; import org.wso2.carbon.registry.core.exceptions.RegistryException; import org.wso2.carbon.registry.core.utils.RegistryUtils; import org.xml.sax.InputSource; import javax.xml.namespace.QName; import javax.xml.stream.XMLStreamException; import java.io.CharArrayReader; import java.util.Iterator; public class LifecycleBeanPopulator { private static final Log log = LogFactory.getLog(LifecycleBeanPopulator.class); public static String serializeLifecycleBean(LifecycleBean bean) throws XMLStreamException { OMFactory factory = OMAbstractFactory.getOMFactory(); OMElement aspect = factory.createOMElement("aspect", null); aspect.addAttribute(factory.createOMAttribute("name", null, bean.getName())); aspect.addAttribute(factory.createOMAttribute("class", null, bean.getReflectionClassName())); OMElement configuration = factory.createOMElement("configuration", null); configuration.addAttribute(factory.createOMAttribute("type", null, "literal")); OMElement lifecycle = factory.createOMElement("lifecycle", null); LifecycleStateBean[] states = bean.getStates(); for (LifecycleStateBean lifecycleState : states) { OMElement state = factory.createOMElement("state", null); state.addAttribute(factory.createOMAttribute("name", null, lifecycleState.getStateName())); if (lifecycleState.getLocation() != null) state.addAttribute(factory.createOMAttribute("location", null, lifecycleState.getLocation())); ChecklistBean checklistBean = lifecycleState.getChecklist(); if (checklistBean != null) { String[] items = checklistBean.getItems(); for (String item : items) { OMElement itemElement = factory.createOMElement("checkitem", null); itemElement.setText(item); state.addChild(itemElement); } } PermissionBean[] permissionBeans = lifecycleState.getPermissions(); if (permissionBeans != null && permissionBeans.length > 0) { OMElement permissionsElement = factory.createOMElement("permissions", null); for (PermissionBean permissionBean : permissionBeans) { OMElement permissionElement = factory.createOMElement("permission", null); permissionElement .addAttribute(factory.createOMAttribute("action", null, permissionBean.getAction())); // permissionElement.addAttribute(factory.createOMAttribute("roles", null, permissionBean.getRoles())); permissionsElement.addChild(permissionElement); } state.addChild(permissionsElement); } JSBean js = lifecycleState.getJs(); if (js != null) { OMElement jsElement = factory.createOMElement("js", null); ScriptBean consoleScriptBean = js.getConsoleScript(); ScriptFunctionBean[] consoleScriptFunctionBeans = js.getConsoleFunctions(); if (consoleScriptBean != null) { OMElement consoleElement = factory.createOMElement("console", null); ScriptElementBean[] scripts = consoleScriptBean.getScripts(); if (scripts != null && scripts.length > 0) { for (ScriptElementBean script : scripts) { OMElement scriptElement = factory.createOMElement("script", null); if (script.getSrc() != null) { scriptElement.addAttribute(factory.createOMAttribute("src", null, script.getSrc())); } scriptElement.addAttribute(factory.createOMAttribute("type", null, "text/javascript")); scriptElement.setText(script.getContent()); consoleElement.addChild(scriptElement); } } if (consoleScriptFunctionBeans != null && consoleScriptFunctionBeans.length > 0) { for (ScriptFunctionBean consoleScriptFunctionBean : consoleScriptFunctionBeans) { consoleElement .addAttribute(factory.createOMAttribute(consoleScriptFunctionBean.getName(), null, consoleScriptFunctionBean.getValue())); } } jsElement.addChild(consoleElement); } ScriptBean serverScriptBean = js.getServerScript(); ScriptFunctionBean[] serverScriptFunctionBeans = js.getServerFunctions(); if (serverScriptBean != null) { OMElement serverElement = factory.createOMElement("server", null); ScriptElementBean[] scripts = serverScriptBean.getScripts(); if (scripts != null && scripts.length > 0) { for (ScriptElementBean script : scripts) { OMElement scriptElement = factory.createOMElement("script", null); if (script.getSrc() != null) { scriptElement.addAttribute(factory.createOMAttribute("src", null, script.getSrc())); } scriptElement.addAttribute(factory.createOMAttribute("type", null, "text/javascript")); scriptElement.setText(script.getContent()); serverElement.addChild(scriptElement); } } if (serverScriptFunctionBeans != null && serverScriptFunctionBeans.length > 0) { for (ScriptFunctionBean serverScriptFunctionBean : serverScriptFunctionBeans) { serverElement.addAttribute(factory.createOMAttribute(serverScriptFunctionBean.getName(), null, serverScriptFunctionBean.getValue())); } } jsElement.addChild(serverElement); } state.addChild(jsElement); } String extensionsXmlString = lifecycleState.getExtensionsXml(); if (extensionsXmlString != null && extensionsXmlString.length() > 0) { OMElement extensionsElement = factory.createOMElement("extensions", null); OMElement dummyElement = AXIOMUtil.stringToOM("<dummy>" + extensionsXmlString + "</dummy>"); Iterator dummyElementItr = dummyElement.getChildElements(); while (dummyElementItr.hasNext()) { OMElement elem = (OMElement) dummyElementItr.next(); if (elem != null) { extensionsElement.addChild(elem); } } state.addChild(extensionsElement); } lifecycle.addChild(state); } configuration.addChild(lifecycle); aspect.addChild(configuration); return aspect.toString(); } public static boolean deserializeLifecycleBean(String configuration, Registry registry) throws Exception { OMElement configurationElement = CommonUtil.buildOMElement(configuration); return deserializeLifecycleBean(configurationElement, registry); } public static boolean deserializeLifecycleBean(OMElement configurationElement, Registry registry) throws Exception { CommonUtil.validateOMContent(configurationElement, CommonUtil.getLifecycleSchemaValidator(CommonUtil.getLifecycleSchemaLocation())); try { OMElement scxmlElement = null; OMElement lifecycleElement = null; OMElement configuration = configurationElement.getFirstElement(); String type = configuration.getAttributeValue(new QName("type")); if (type.equals("literal")) { lifecycleElement = configuration.getFirstElement(); } else if (type.equals("resource")) { String resourcePath = configuration.getText(); if (registry.resourceExists(resourcePath)) { Resource resource = registry.get(resourcePath); if (resource.getContent() != null) { if (resource.getContent() instanceof String) { lifecycleElement = CommonUtil.buildOMElement((String) resource.getContent()); } else if (resource.getContent() instanceof byte[]) { lifecycleElement = CommonUtil .buildOMElement(RegistryUtils.decodeBytes((byte[]) resource.getContent())); } else { String msg = "Could not find valid lifecycle configuration"; log.error(msg); throw new RegistryException(msg); } } else { String msg = "Resource does not contain a valid lifecycle configuration"; log.error(msg); throw new RegistryException(msg); } } else { String msg = "Resource not found at " + resourcePath; log.error(msg); throw new RegistryException(msg); } } else { String msg = "The type must be either literal or resource"; log.error(msg); throw new RegistryException(msg); } scxmlElement = lifecycleElement.getFirstElement(); CommonUtil.validateOMContent(scxmlElement); CommonUtil.validateLifeCycle(scxmlElement); // Validating whether this complies to the scxml specification. SCXMLParser.parse(new InputSource(new CharArrayReader((scxmlElement.toString()).toCharArray())), null); // Validating whether the data model is correct if (!CommonUtil.validateSCXMLDataModel(scxmlElement)) { throw new RegistryException("Failed to validate the data model. Invalid forEvent found"); } } catch (RegistryException e) { throw e; } catch (Exception e) { String msg = e.getMessage() + ". " + "Please check whether there are any whitespaces in state names"; log.error(msg, e); throw new RegistryException(msg); } return true; } // Seems like we don't need this method. The scxml parser does the parsing /*private static boolean checkWhiteSpacesInConfig(OMElement scxmlContent){ try { String xpathExpression = "//pre:transition"; AXIOMXPath xpath = new AXIOMXPath(xpathExpression); xpath.addNamespace("pre",scxmlContent.getNamespace().getNamespaceURI()); List resultNodes = xpath.selectNodes(scxmlContent); if (resultNodes != null && resultNodes.size() > 0) { for (Object resultNode : resultNodes) { OMElement targetElement = (OMElement) resultNode; String targetName = targetElement.getAttributeValue(new QName("target")); if(targetName.trim().contains(" ")){ return false; } } } } catch (Exception e) { log.error(e.getMessage(),e); return false; } return true; }*/ }