org.camunda.bpm.engine.impl.scripting.DynamicExecutableScript Maven / Gradle / Ivy
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* Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH
* under one or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. Camunda licenses this file to you under the Apache License,
* Version 2.0; 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.camunda.bpm.engine.impl.scripting;
import javax.script.Bindings;
import javax.script.ScriptEngine;
import javax.script.ScriptException;
import org.camunda.bpm.engine.ScriptEvaluationException;
import org.camunda.bpm.engine.delegate.Expression;
import org.camunda.bpm.engine.delegate.VariableScope;
/**
* A script which is dynamically determined during the execution.
* Therefore it has to be executed in the context of an atomic operation.
*
* @author Sebastian Menski
*/
public abstract class DynamicExecutableScript extends ExecutableScript {
protected final Expression scriptExpression;
protected DynamicExecutableScript(Expression scriptExpression, String language) {
super(language);
this.scriptExpression = scriptExpression;
}
public Object evaluate(ScriptEngine scriptEngine, VariableScope variableScope, Bindings bindings) {
String source = getScriptSource(variableScope);
try {
return scriptEngine.eval(source, bindings);
}
catch (ScriptException e) {
String activityIdMessage = getActivityIdExceptionMessage(variableScope);
throw new ScriptEvaluationException("Unable to evaluate script" + activityIdMessage + ": " + e.getMessage(), e);
}
}
protected String evaluateExpression(VariableScope variableScope) {
return (String) scriptExpression.getValue(variableScope);
}
public abstract String getScriptSource(VariableScope variableScope);
}