/*
* Copyright 2010 JBoss Inc
*
* 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.drools.eclipse.debug;
import java.util.ArrayList;
import java.util.List;
import org.drools.eclipse.DroolsEclipsePlugin;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.model.IValue;
import org.eclipse.debug.core.model.IVariable;
import org.eclipse.jdt.debug.core.IJavaArray;
import org.eclipse.jdt.debug.core.IJavaObject;
import org.eclipse.jdt.debug.core.IJavaValue;
import org.jbpm.process.instance.ProcessInstance;
/**
* The process instances view content provider.
*/
public class ProcessInstancesViewContentProvider extends DroolsDebugViewContentProvider {
private DroolsDebugEventHandlerView view;
public ProcessInstancesViewContentProvider(DroolsDebugEventHandlerView view) {
this.view = view;
}
protected String getEmptyString() {
return "The selected working memory has no process instances.";
}
public Object[] getChildren(Object obj) {
try {
IVariable[] instances = null;
if (obj != null && obj instanceof IJavaObject
&& ("org.drools.core.common.AbstractWorkingMemory".equals(
((IJavaObject) obj).getReferenceTypeName()) ||
"org.drools.core.reteoo.ReteooStatefulSession".equals(
((IJavaObject) obj).getReferenceTypeName()) ||
// for backwards compatibility
"org.drools.reteoo.ReteooStatefulSession".equals(
((IJavaObject) obj).getReferenceTypeName()))) {
instances = getProcessInstances((IJavaObject) obj);
} else if (obj instanceof IVariable) {
if (view.isShowLogicalStructure()) {
IValue value = getLogicalValue(((IVariable) obj).getValue(), new ArrayList<IVariable>());
instances = value.getVariables();
}
if (instances == null) {
instances = ((IVariable) obj).getValue().getVariables();
}
}
if (instances == null) {
return new Object[0];
} else {
cache(obj, instances);
return instances;
}
} catch (DebugException e) {
DroolsEclipsePlugin.log(e);
return new Object[0];
}
}
private IVariable[] getProcessInstances(IJavaObject stackObj) throws DebugException {
IValue objects = DebugUtil.getValueByExpression("return getProcessInstances().toArray();", stackObj);
if (objects instanceof IJavaArray) {
IJavaArray array = (IJavaArray) objects;
List<IVariable> result = new ArrayList<IVariable>();
IJavaValue[] javaVals = array.getValues();
for ( int i = 0; i < javaVals.length; i++ ) {
IJavaValue processInstance = javaVals[i];
String id = null;
IVariable[] vars = processInstance.getVariables();
for ( int j = 0; j < vars.length; j++ ) {
IVariable var = vars[j];
if ("id".equals(var.getName())) {
id = var.getValue().getValueString();
}
}
result.add(new VariableWrapper("[" + id + "]", processInstance));
}
return result.toArray(new IVariable[result.size()]);
}
return null;
}
}