org.camunda.bpm.engine.impl.el.ExpressionManager 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.el;
import java.lang.reflect.Method;
/**
*
* Central manager for all expressions.
*
*
* Process parsers will use this to build expression objects that are stored in
* the process definitions.
*
*
* Then also this class is used as an entry point for runtime evaluation of the
* expressions.
*
*/
public interface ExpressionManager {
/**
* @param expression
* @return a parsed expression
*/
Expression createExpression(String expression);
/**
*
* Adds a custom function to the expression manager that can be used in
* expression evaluation later on. Ideally, use this in the setup phase of the
* expression manager, i.e. before the first invocation of
* {@link #createExpression(String) createExpression}.
*
*
* @param name
* @param function
*/
void addFunction(String name, Method function);
}