scriptbytecodeadapter.java

来自「Groovy动态语言 运行在JVM中的动态语言 可以方便的处理业务逻辑变化大的业」· Java 代码 · 共 834 行 · 第 1/3 页

/*
 $Id: ScriptBytecodeAdapter.java 4294 2006-12-02 19:31:27Z blackdrag $

 Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.

 Redistribution and use of this software and associated documentation
 ("Software"), with or without modification, are permitted provided
 that the following conditions are met:

 1. Redistributions of source code must retain copyright
    statements and notices.  Redistributions must also contain a
    copy of this document.

 2. Redistributions in binary form must reproduce the
    above copyright notice, this list of conditions and the
    following disclaimer in the documentation and/or other
    materials provided with the distribution.

 3. The name "groovy" must not be used to endorse or promote
    products derived from this Software without prior written
    permission of The Codehaus.  For written permission,
    please contact [e-mail].

 4. Products derived from this Software may not be called "groovy"
    nor may "groovy" appear in their names without prior written
    permission of The Codehaus. "groovy" is a registered
    trademark of The Codehaus.

 5. Due credit should be given to The Codehaus -
    http://groovy.codehaus.org/

 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 */
package org.codehaus.groovy.runtime;

import groovy.lang.*;

import java.util.Iterator;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation;
import org.codehaus.groovy.runtime.wrappers.GroovyObjectWrapper;
import org.codehaus.groovy.runtime.wrappers.PojoWrapper;
import org.codehaus.groovy.runtime.wrappers.Wrapper;

/**
 * A static helper class to interface bytecode and runtime 
 *
 * @author Jochen Theodorou
 * @version $Revision: 4294 $
 */
public class ScriptBytecodeAdapter {
    public static final Object[] EMPTY_ARGS = {};
    private static final Integer ZERO = new Integer(0);
    private static final Integer MINUS_ONE = new Integer(-1);
    private static final Integer ONE = new Integer(1);

    //  --------------------------------------------------------
    //                   exception handling
    //  --------------------------------------------------------
    private static Object unwrap(GroovyRuntimeException gre) throws Throwable{
        Throwable th = gre;
        if (th.getCause()!=null && th.getCause()!=gre) th=th.getCause();
        if (th!=gre && (th instanceof GroovyRuntimeException)) unwrap((GroovyRuntimeException) th);
        throw th;
    }
    
    //  --------------------------------------------------------
    //                       methods for this
    //  --------------------------------------------------------
    public static Object invokeMethodOnCurrentN(Class senderClass, GroovyObject receiver, String messageName, Object[] messageArguments) throws Throwable{
        Object result=null;
        try {
            try {
                // if it's a pure interceptable object (even intercepting toString(), clone(), ...)
                if (receiver instanceof GroovyInterceptable) {
                    result = receiver.invokeMethod(messageName, messageArguments);
                }
                //else if there's a statically typed method or a GDK method
                else {
                    result = receiver.getMetaClass().invokeMethod(senderClass, receiver, messageName, messageArguments, false, true);
                }
            } catch (MissingMethodException e) {
                if (receiver.getClass() == e.getType() && e.getMethod().equals(messageName)) {
                    // in case there's nothing else, invoke the object's own invokeMethod()
                    result = receiver.invokeMethod(messageName, messageArguments);
                } else {
                    throw e;
                }
            }
        } catch (GroovyRuntimeException t) {
            unwrap(t);
        }
        return result;
    }
    
    public static Object invokeMethodOnCurrentNSafe(Class senderClass, GroovyObject receiver, String messageName, Object[] messageArguments) throws Throwable{
        return invokeMethodOnCurrentN(senderClass,receiver,messageName,messageArguments);
    }
    
    public static Object invokeMethodOnCurrentNSpreadSafe(Class senderClass, GroovyObject receiver, String messageName, Object[] messageArguments) throws Throwable{
        if (! (receiver instanceof List)) return invokeMethodOnCurrentN(senderClass,receiver,messageName, messageArguments);
        
        List list = (List) receiver;
        List answer = new ArrayList();
        for (Iterator it = list.iterator(); it.hasNext();) {
            answer.add(invokeMethodNSafe(senderClass, it.next(), messageName, messageArguments));
        }
        return answer;
    }
    
    public static Object invokeMethodOnCurrent0(Class senderClass, GroovyObject receiver, String messageName)  throws Throwable{
        return invokeMethodOnCurrentN(senderClass,receiver,messageName,EMPTY_ARGS);
    }
    
    public static Object invokeMethodOnCurrent0Safe(Class senderClass, GroovyObject receiver, String messageName, Object[] messageArguments) throws Throwable{
        return invokeMethodOnCurrentNSafe(senderClass,receiver,messageName,EMPTY_ARGS);
    }
    
    public static Object invokeMethodOnCurrent0SpreadSafe(Class senderClass, GroovyObject receiver, String messageName, Object[] messageArguments) throws Throwable{
        return invokeMethodOnCurrentNSpreadSafe(senderClass,receiver,messageName,EMPTY_ARGS);
    }
    
    //  --------------------------------------------------------
    //                       methods for super
    //  --------------------------------------------------------
    public static Object invokeMethodOnSuperN(Class senderClass, GroovyObject receiver, String messageName, Object[] messageArguments) throws Throwable{
        MetaClass metaClass = receiver.getMetaClass();
        // ignore interception and missing method fallback
        Object result=null;
        try {
            result = metaClass.invokeMethod(senderClass, receiver, messageName, messageArguments, true, true);
        } catch (GroovyRuntimeException t) {
            unwrap(t);
        }
        return result;        
    }
    
    public static Object invokeMethodOnSuperNSafe(Class senderClass, GroovyObject receiver, String messageName, Object[] messageArguments) throws Throwable{
        return invokeMethodOnSuperN(senderClass,receiver,messageName,messageArguments);
    }
    
    public static Object invokeMethodOnSuperNSpreadSafe(Class senderClass, GroovyObject receiver, String messageName, Object[] messageArguments) throws Throwable{
        if (! (receiver instanceof List)) return invokeMethodOnSuperN(senderClass,receiver,messageName, messageArguments);
        
        List list = (List) receiver;
        List answer = new ArrayList();
        for (Iterator it = list.iterator(); it.hasNext();) {
            answer.add(invokeMethodNSafe(senderClass,it.next(), messageName, messageArguments));
        }
        return answer;
    }
    
    public static Object invokeMethodOnSuper0(Class senderClass, GroovyObject receiver, String messageName)  throws Throwable{
        return invokeMethodOnSuperN(senderClass,receiver,messageName,EMPTY_ARGS);
    }
    
    public static Object invokeMethodOnSuper0Safe(Class senderClass, GroovyObject receiver, String messageName, Object[] messageArguments) throws Throwable{
        return invokeMethodOnSuperNSafe(senderClass,receiver,messageName,EMPTY_ARGS);
    }
    
    public static Object invokeMethodOnSuper0SpreadSafe(Class senderClass, GroovyObject receiver, String messageName, Object[] messageArguments) throws Throwable{
        return invokeMethodOnSuperNSpreadSafe(senderClass,receiver,messageName,EMPTY_ARGS);
    }

    //  --------------------------------------------------------
    //              normal method invocation
    //  --------------------------------------------------------       
    public static Object invokeMethodN(Class senderClass, Object receiver, String messageName, Object[] messageArguments) throws Throwable{
        try {
            return InvokerHelper.invokeMethod(receiver, messageName, messageArguments);
        } catch (GroovyRuntimeException gre) {
            return unwrap(gre);
        }
    }
    
    public static Object invokeMethodNSafe(Class senderClass, Object receiver, String messageName, Object[] messageArguments) throws Throwable{
        if (receiver==null) return null;
        return invokeMethodN(senderClass,receiver,messageName,messageArguments);
    }
    
    public static Object invokeMethodNSpreadSafe(Class senderClass, Object receiver, String messageName, Object[] messageArguments) throws Throwable{
        if (receiver==null) return null;
        if (! (receiver instanceof List)) return invokeMethodN(senderClass,receiver,messageName, messageArguments);
        
        List list = (List) receiver;
        List answer = new ArrayList();
        for (Iterator it = list.iterator(); it.hasNext();) {
            answer.add(invokeMethodNSafe(senderClass, it.next(), messageName, messageArguments));
        }
        return answer;
    }
    
    public static Object invokeMethod0(Class senderClass, Object receiver, String messageName)  throws Throwable{
        return invokeMethodN(senderClass,receiver,messageName,EMPTY_ARGS);
    }
    
    public static Object invokeMethod0Safe(Class senderClass, Object receiver, String messageName) throws Throwable{
        if (receiver==null) return null;
        return invokeMethodNSafe(senderClass,receiver,messageName,EMPTY_ARGS);
    }
    
    public static Object invokeMethod0SpreadSafe(Class senderClass, Object receiver, String messageName) throws Throwable{
        return invokeMethodNSpreadSafe(senderClass,receiver,messageName,EMPTY_ARGS);
    }
    
    //  --------------------------------------------------------
    //                static normal method invocation
    //  --------------------------------------------------------       
    public static Object invokeStaticMethodN(Class senderClass, Class receiver, String messageName, Object[] messageArguments) throws Throwable{
        try {
            return InvokerHelper.invokeStaticMethod(receiver, messageName, messageArguments);
        } catch (GroovyRuntimeException gre) {
            return unwrap(gre);
        }
    }
    
    public static Object invokeStaticMethod0(Class senderClass, Class receiver, String messageName)  throws Throwable{
        return invokeStaticMethodN(senderClass,receiver,messageName,EMPTY_ARGS);
    }
    
    //  --------------------------------------------------------
    //              normal constructor invocation (via new)
    //  --------------------------------------------------------       
    public static Object invokeNewN(Class senderClass, Class receiver, Object arguments) throws Throwable{
        try {
            return InvokerHelper.invokeConstructorOf(receiver, arguments);
        } catch (GroovyRuntimeException gre) {
            return unwrap(gre);
        }  
    }
    
    public static Object invokeNew0(Class senderClass, Class receiver) throws Throwable {
        return invokeNewN(senderClass, receiver, EMPTY_ARGS);
    }

    //  --------------------------------------------------------
    //       special constructor invocation (via this/super)
    //  --------------------------------------------------------       

    public static int selectConstructorAndTransformArguments(Object[] arguments, int numberOfCosntructors, Class which) {
        MetaClassImpl metaClass = (MetaClassImpl) InvokerHelper.getInstance().getMetaRegistry().getMetaClass(which);
        return metaClass.selectConstructorAndTransformArguments(numberOfCosntructors, arguments);
    }

    //  --------------------------------------------------------
    //              field handling super: get
    //  --------------------------------------------------------       

    public static Object getFieldOnSuper(Class senderClass, Object receiver, String messageName) throws Throwable{
        try {
            if (receiver instanceof Class) {
                return InvokerHelper.getAttribute(receiver,messageName); 
            } else {            
                MetaClass mc = ((GroovyObject) receiver).getMetaClass();
                return mc.getAttribute(senderClass, receiver, messageName, true);
            }
        } catch (GroovyRuntimeException gre) {
            return unwrap(gre);
        }
    }