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Hutool是一个小而全的Java工具类库,通过静态方法封装,降低相关API的学习成本,提高工作效率,使Java拥有函数式语言般的优雅,让Java语言也可以“甜甜的”。
package cn.hutool.script;
import java.io.Reader;
import javax.script.Bindings;
import javax.script.Compilable;
import javax.script.CompiledScript;
import javax.script.Invocable;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineFactory;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
import cn.hutool.core.util.StrUtil;
/**
* 全功能引擎类,支持Compilable和Invocable
*
* @author Looly
*
*/
public class FullSupportScriptEngine implements ScriptEngine, Compilable, Invocable {
ScriptEngine engine;
/**
* 构造
*
* @param engine 脚本引擎
*/
public FullSupportScriptEngine(ScriptEngine engine) {
this.engine = engine;
}
/**
* 构造
*
* @param nameOrExtOrMime 脚本名或者脚本语言扩展名或者MineType
*/
public FullSupportScriptEngine(String nameOrExtOrMime) {
final ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName(nameOrExtOrMime);
if (null == engine) {
engine = manager.getEngineByExtension(nameOrExtOrMime);
}
if (null == engine) {
engine = manager.getEngineByMimeType(nameOrExtOrMime);
}
if (null == engine) {
throw new NullPointerException(StrUtil.format("Script for [{}] not support !", nameOrExtOrMime));
}
this.engine = engine;
}
// ----------------------------------------------------------------------------------------------- Invocable
@Override
public Object invokeMethod(Object thiz, String name, Object... args) throws ScriptException, NoSuchMethodException {
return ((Invocable) engine).invokeMethod(thiz, name, args);
}
@Override
public Object invokeFunction(String name, Object... args) throws ScriptException, NoSuchMethodException {
return ((Invocable) engine).invokeFunction(name, args);
}
@Override
public T getInterface(Class clasz) {
return ((Invocable) engine).getInterface(clasz);
}
@Override
public T getInterface(Object thiz, Class clasz) {
return ((Invocable) engine).getInterface(thiz, clasz);
}
// ----------------------------------------------------------------------------------------------- Compilable
@Override
public CompiledScript compile(String script) throws ScriptException {
return ((Compilable) engine).compile(script);
}
@Override
public CompiledScript compile(Reader script) throws ScriptException {
return ((Compilable) engine).compile(script);
}
// ----------------------------------------------------------------------------------------------- ScriptEngine
@Override
public Object eval(String script, ScriptContext context) throws ScriptException {
return engine.eval(script, context);
}
@Override
public Object eval(Reader reader, ScriptContext context) throws ScriptException {
return engine.eval(reader, context);
}
@Override
public Object eval(String script) throws ScriptException {
return engine.eval(script);
}
@Override
public Object eval(Reader reader) throws ScriptException {
return engine.eval(reader);
}
@Override
public Object eval(String script, Bindings n) throws ScriptException {
return engine.eval(script, n);
}
@Override
public Object eval(Reader reader, Bindings n) throws ScriptException {
return engine.eval(reader, n);
}
@Override
public void put(String key, Object value) {
engine.put(key, value);
}
@Override
public Object get(String key) {
return engine.get(key);
}
@Override
public Bindings getBindings(int scope) {
return engine.getBindings(scope);
}
@Override
public void setBindings(Bindings bindings, int scope) {
engine.setBindings(bindings, scope);
}
@Override
public Bindings createBindings() {
return engine.createBindings();
}
@Override
public ScriptContext getContext() {
return engine.getContext();
}
@Override
public void setContext(ScriptContext context) {
engine.setContext(context);
}
@Override
public ScriptEngineFactory getFactory() {
return engine.getFactory();
}
}
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