/*
* Copyright 2010-2011 the original author or authors.
*
* 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 com.starflow.wf.core.script;
import java.io.Reader;
import javax.script.AbstractScriptEngine;
import javax.script.Bindings;
import javax.script.Compilable;
import javax.script.CompiledScript;
import javax.script.ScriptContext;
import javax.script.ScriptEngineFactory;
import javax.script.ScriptException;
import javax.script.SimpleBindings;
import com.googlecode.aviator.AviatorEvaluator;
/**
* Aviator 表达式解析引擎
*
* @author libinsong1204@gmail.com
* @date 2011-1-18 上午11:03:34
* @version
*/
public class AviatorScriptEngine extends AbstractScriptEngine implements
Compilable {
//缓存编译结果
private boolean cached = true;
private final AviatorScriptEngineFactory factory;
public AviatorScriptEngine(AviatorScriptEngineFactory factory) {
this.factory = factory;
}
@Override
public CompiledScript compile(String script) throws ScriptException {
return new CompiledAviatorScript(this, AviatorEvaluator.compile(script, cached));
}
@Override
public CompiledScript compile(Reader script) throws ScriptException {
throw new UnsupportedOperationException();
}
@Override
public Bindings createBindings() {
return new SimpleBindings();
}
@Override
public Object eval(String script, ScriptContext context)
throws ScriptException {
return compile(script).eval(context);
}
@Override
public Object eval(Reader script, ScriptContext context)
throws ScriptException {
throw new UnsupportedOperationException();
}
@Override
public ScriptEngineFactory getFactory() {
return this.factory;
}
public boolean isCached() {
return cached;
}
public void setCached(boolean cached) {
this.cached = cached;
}
}