org.jeasy.rules.jexl.JexlAction Maven / Gradle / Ivy
/*
* The MIT License
*
* Copyright (c) 2022, Mahmoud Ben Hassine ([email protected])
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.jeasy.rules.jexl;
import java.util.Objects;
import org.apache.commons.jexl3.JexlEngine;
import org.apache.commons.jexl3.JexlException;
import org.apache.commons.jexl3.JexlScript;
import org.apache.commons.jexl3.MapContext;
import org.jeasy.rules.api.Action;
import org.jeasy.rules.api.Facts;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author Lauri Kimmel
* @author Mahmoud Ben Hassine
*/
public class JexlAction implements Action {
private static final Logger LOGGER = LoggerFactory.getLogger(JexlAction.class);
private final JexlScript compiledScript;
private final String expression;
public JexlAction(String expression) {
this.expression = Objects.requireNonNull(expression, "expression cannot be null");
this.compiledScript = JexlRule.DEFAULT_JEXL.createScript(expression);
}
public JexlAction(String expression, JexlEngine jexl) {
this.expression = Objects.requireNonNull(expression, "expression cannot be null");
Objects.requireNonNull(jexl, "jexl cannot be null");
this.compiledScript = jexl.createScript(expression);
}
@Override
public void execute(Facts facts) {
Objects.requireNonNull(facts, "facts cannot be null");
MapContext ctx = new MapContext(facts.asMap());
try {
compiledScript.execute(ctx);
} catch (JexlException e) {
LOGGER.error("Unable to execute expression: '" + expression + "' on facts: " + facts, e);
throw e;
}
}
}