/*
* 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.lenya.workflow.impl;
import java.util.HashMap;
import java.util.Map;
import org.apache.avalon.excalibur.pool.Poolable;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.avalon.framework.service.Serviceable;
import org.apache.lenya.cms.cocoon.source.SourceUtil;
import org.apache.lenya.workflow.Workflow;
import org.apache.lenya.workflow.WorkflowEngine;
import org.apache.lenya.workflow.WorkflowException;
import org.apache.lenya.workflow.WorkflowManager;
import org.apache.lenya.workflow.Workflowable;
import org.w3c.dom.Document;
/**
* Workflow manager implementation.
*
* @version $Id: WorkflowManagerImpl.java 179751 2005-06-03 09:13:35Z andreas $
*/
public class WorkflowManagerImpl extends AbstractLogEnabled implements WorkflowManager,
Serviceable, Poolable {
private Map uri2workflow = new HashMap();
/**
* @see org.apache.lenya.workflow.WorkflowManager#invoke(org.apache.lenya.workflow.Workflowable,
* java.lang.String, boolean)
*/
public void invoke(Workflowable workflowable, String event, boolean force)
throws WorkflowException {
if (hasWorkflow(workflowable)) {
WorkflowEngine engine = new WorkflowEngineImpl();
Workflow workflow = getWorkflowSchema(workflowable);
if (force && !engine.canInvoke(workflowable, workflow, event)) {
throw new WorkflowException("The event [" + event
+ "] cannot be invoked on the document [" + workflowable + "]");
}
engine.invoke(workflowable, workflow, event);
}
}
/**
* @see org.apache.lenya.workflow.WorkflowManager#invoke(org.apache.lenya.workflow.Workflowable,
* java.lang.String)
*/
public void invoke(Workflowable workflowable, String event) throws WorkflowException {
invoke(workflowable, event, true);
}
/**
* @see org.apache.lenya.workflow.WorkflowManager#canInvoke(org.apache.lenya.workflow.Workflowable,
* java.lang.String)
*/
public boolean canInvoke(Workflowable workflowable, String event) {
boolean canInvoke = true;
try {
if (hasWorkflow(workflowable)) {
Workflow workflow = getWorkflowSchema(workflowable);
WorkflowEngine engine = new WorkflowEngineImpl();
canInvoke = engine.canInvoke(workflowable, workflow, event);
}
} catch (Exception e) {
throw new RuntimeException(e);
}
return canInvoke;
}
protected ServiceManager manager;
/**
* @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
*/
public void service(ServiceManager manager) throws ServiceException {
this.manager = manager;
}
/**
* @see org.apache.lenya.workflow.WorkflowManager#getWorkflowSchema(org.apache.lenya.workflow.Workflowable)
*/
public Workflow getWorkflowSchema(Workflowable workflowable) throws WorkflowException {
WorkflowImpl workflow = null;
try {
String uri = workflowable.getWorkflowSchemaURI();
getLogger().debug("Workflow URI: " + uri);
if (uri != null) {
workflow = (WorkflowImpl) this.uri2workflow.get(uri);
if (workflow == null) {
Document document = SourceUtil.readDOM(uri, this.manager);
if (document == null) {
throw new WorkflowException("Could not read workflow schema from URI ["
+ uri + "]!");
}
WorkflowBuilder builder = new WorkflowBuilder(getLogger());
workflow = builder.buildWorkflow(uri, document);
this.uri2workflow.put(uri, workflow);
}
}
} catch (final WorkflowException e) {
throw e;
} catch (final Exception e) {
throw new WorkflowException(e);
}
return workflow;
}
/**
* @see org.apache.lenya.workflow.WorkflowManager#hasWorkflow(org.apache.lenya.workflow.Workflowable)
*/
public boolean hasWorkflow(Workflowable workflowable) {
return workflowable.getWorkflowSchemaURI() != null;
}
}