/*
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* JBoss, Home of Professional Open Source
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* Copyright 2005, JBoss Inc., and individual contributors as indicated
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* by the @authors tag. See the copyright.txt in the distribution for a
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* full listing of individual contributors.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this software; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
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*/
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package org.jbpm.pvm.internal.env;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.Map;
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import org.jbpm.api.JbpmException;
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import org.jbpm.internal.log.Log;
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/**
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* @author Tom Baeyens
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*/
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public class BasicEnvironment extends EnvironmentImpl {
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private static final long serialVersionUID = 1L;
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private static final Log log = Log.getLog(BasicEnvironment.class.getName());
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protected String authenticatedUserId;
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protected Map<String, Context> contexts;
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protected ArrayList<String> defaultSearchOrderList;
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protected String[] defaultSearchOrder;
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protected Throwable exception;
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protected transient ClassLoader classLoader;
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public BasicEnvironment() {
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contexts = new HashMap<String, Context>();
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defaultSearchOrderList = new ArrayList<String>();
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defaultSearchOrder = null;
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}
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// context methods ////////////////////////////////////////////////////////////
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public Context getContext(String contextName) {
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return contexts.get(contextName);
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}
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public void setContext(Context context) {
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String key = context.getName();
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if (contexts.put(key, context)==null) {
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defaultSearchOrderList.add(key);
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}
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defaultSearchOrder = null;
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}
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public Context removeContext(Context context) {
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return removeContext(context.getName());
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}
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public Context removeContext(String contextName) {
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Context removedContext = contexts.remove(contextName);
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if (removedContext!=null) {
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defaultSearchOrderList.remove(contextName);
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defaultSearchOrder = null;
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}
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return removedContext;
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}
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public Context getEnvironmentFactoryContext() {
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return getContext(Context.CONTEXTNAME_PROCESS_ENGINE);
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}
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public Context getEnvironmentContext() {
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return getContext(Context.CONTEXTNAME_TRANSACTION);
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}
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// authenticatedUserId //////////////////////////////////////////////////////
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public String getAuthenticatedUserId() {
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return authenticatedUserId;
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}
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public void setAuthenticatedUserId(String authenticatedUserId) {
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this.authenticatedUserId = authenticatedUserId;
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}
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// classloader methods //////////////////////////////////////////////////////
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public ClassLoader getClassLoader() {
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return classLoader;
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}
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public void setClassLoader(ClassLoader classLoader) {
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this.classLoader = classLoader;
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}
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// search methods ///////////////////////////////////////////////////////////
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public Object get(String name) {
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return get(name, null);
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}
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public Object get(String name, String[] searchOrder) {
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if (searchOrder==null) {
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searchOrder = getDefaultSearchOrder();
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}
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for (int i=0; i<searchOrder.length; i++){
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Context context = contexts.get(searchOrder[i]);
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if (context.has(name)) {
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return context.get(name);
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}
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}
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return null;
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}
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public <T> T get(Class<T> type) {
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return get(type, null);
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}
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public <T> T get(Class<T> type, String[] searchOrder) {
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if (searchOrder==null) {
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searchOrder = getDefaultSearchOrder();
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}
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for (int i=0; i<searchOrder.length; i++){
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Context context = contexts.get(searchOrder[i]);
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T o = context.get(type);
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if (o!=null) {
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return o;
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}
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}
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return null;
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}
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// close ////////////////////////////////////////////////////////////////////
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public void close() {
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log.trace("closing "+this);
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EnvironmentImpl popped = EnvironmentImpl.popEnvironment();
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if (this!=popped) {
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throw new JbpmException("environment nesting problem");
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}
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}
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// private methods //////////////////////////////////////////////////////////
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protected String[] getDefaultSearchOrder() {
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if (defaultSearchOrder==null) {
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int size = defaultSearchOrderList.size();
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defaultSearchOrder = (String[]) new String[size];
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for (int i=0; i<size; i++) {
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defaultSearchOrder[i] = defaultSearchOrderList.get(size-1-i);
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}
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}
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return defaultSearchOrder;
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}
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}
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