org.flowable.engine.impl.scripting.ScriptCondition Maven / Gradle / Ivy
/* 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.flowable.engine.impl.scripting;
import org.flowable.common.engine.api.FlowableException;
import org.flowable.common.engine.impl.scripting.ScriptingEngines;
import org.flowable.engine.delegate.DelegateExecution;
import org.flowable.engine.impl.Condition;
import org.flowable.engine.impl.util.CommandContextUtil;
/**
* @author Tom Baeyens
*/
public class ScriptCondition implements Condition {
private final String expression;
private final String language;
public ScriptCondition(String expression, String language) {
this.expression = expression;
this.language = language;
}
@Override
public boolean evaluate(String sequenceFlowId, DelegateExecution execution) {
ScriptingEngines scriptingEngines = CommandContextUtil.getProcessEngineConfiguration().getScriptingEngines();
Object result = scriptingEngines.evaluate(expression, language, execution);
if (result == null) {
throw new FlowableException("condition script returns null: " + expression);
}
if (!(result instanceof Boolean)) {
throw new FlowableException("condition script returns non-Boolean: " + result + " (" + result.getClass().getName() + ")");
}
return (Boolean) result;
}
}