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Groovy: A powerful, dynamic language for the JVM
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.codehaus.groovy.reflection;
import groovy.lang.MetaClassImpl;
import groovy.lang.MetaMethod;
import groovy.lang.MissingMethodException;
import org.codehaus.groovy.classgen.asm.BytecodeHelper;
import org.codehaus.groovy.runtime.InvokerInvocationException;
import org.codehaus.groovy.runtime.callsite.*;
import org.codehaus.groovy.runtime.metaclass.MethodHelper;
import java.lang.ref.SoftReference;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.*;
/**
* @author Alex.Tkachman
*/
public class CachedMethod extends MetaMethod implements Comparable {
public final CachedClass cachedClass;
private final Method cachedMethod;
private int hashCode;
private static MyComparator comparator = new MyComparator();
private SoftReference pogoCallSiteConstructor, pojoCallSiteConstructor, staticCallSiteConstructor;
private boolean skipCompiled;
public CachedMethod(CachedClass clazz, Method method) {
this.cachedMethod = method;
this.cachedClass = clazz;
}
public CachedMethod(Method method) {
this(ReflectionCache.getCachedClass(method.getDeclaringClass()),method);
}
public static CachedMethod find(Method method) {
CachedMethod[] methods = ReflectionCache.getCachedClass(method.getDeclaringClass()).getMethods();
// for (int i = 0; i < methods.length; i++) {
// CachedMethod cachedMethod = methods[i];
// if (cachedMethod.cachedMethod.equals(method))
// return cachedMethod;
// }
// return null;
int i = Arrays.binarySearch(methods, method, comparator);
if (i < 0)
return null;
return methods[i];
}
protected Class[] getPT() {
return cachedMethod.getParameterTypes();
}
public String getName() {
return cachedMethod.getName();
}
public String getDescriptor() {
return BytecodeHelper.getMethodDescriptor(getReturnType(), getNativeParameterTypes());
}
public CachedClass getDeclaringClass() {
return cachedClass;
}
public final Object invoke(Object object, Object[] arguments) {
try {
return cachedMethod.invoke(object, arguments);
} catch (IllegalArgumentException e) {
throw new InvokerInvocationException(e);
} catch (IllegalAccessException e) {
throw new InvokerInvocationException(e);
} catch (InvocationTargetException e) {
Throwable cause = e.getCause();
throw (cause instanceof RuntimeException && !(cause instanceof MissingMethodException)) ?
(RuntimeException) cause : new InvokerInvocationException(e);
}
}
public ParameterTypes getParamTypes() {
return null;
}
public Class getReturnType() {
return cachedMethod.getReturnType();
}
public int getParamsCount() {
return getParameterTypes().length;
}
public int getModifiers() {
return cachedMethod.getModifiers();
}
public String getSignature() {
return getName() + getDescriptor();
}
public final Method setAccessible() {
// if (queuedToCompile.compareAndSet(false,true)) {
// if (isCompilable())
// CompileThread.addMethod(this);
// }
return cachedMethod;
}
public boolean isStatic() {
return MethodHelper.isStatic(cachedMethod);
}
public int compareTo(Object o) {
if (o instanceof CachedMethod)
return compareToCachedMethod((CachedMethod)o);
else
return compareToMethod((Method)o);
}
private int compareToCachedMethod(CachedMethod other) {
if (other == null)
return -1;
final int strComp = getName().compareTo(other.getName());
if (strComp != 0)
return strComp;
final int retComp = getReturnType().getName().compareTo(other.getReturnType().getName());
if (retComp != 0)
return retComp;
CachedClass[] params = getParameterTypes();
CachedClass[] otherParams = other.getParameterTypes();
final int pd = params.length - otherParams.length;
if (pd != 0)
return pd;
for (int i = 0; i != params.length; ++i) {
final int nameComp = params[i].getName().compareTo(otherParams[i].getName());
if (nameComp != 0)
return nameComp;
}
final int classComp = cachedClass.toString().compareTo(other.getDeclaringClass().toString());
if (classComp != 0)
return classComp;
throw new RuntimeException("Should never happen");
}
private int compareToMethod(Method other) {
if (other == null)
return -1;
final int strComp = getName().compareTo(other.getName());
if (strComp != 0)
return strComp;
final int retComp = getReturnType().getName().compareTo(other.getReturnType().getName());
if (retComp != 0)
return retComp;
CachedClass[] params = getParameterTypes();
Class[] mparams = other.getParameterTypes();
final int pd = params.length - mparams.length;
if (pd != 0)
return pd;
for (int i = 0; i != params.length; ++i) {
final int nameComp = params[i].getName().compareTo(mparams[i].getName());
if (nameComp != 0)
return nameComp;
}
return 0;
}
public boolean equals(Object o) {
return (o instanceof CachedMethod && cachedMethod.equals(((CachedMethod)o).cachedMethod))
|| (o instanceof Method && cachedMethod.equals(o));
}
public int hashCode() {
if (hashCode == 0) {
hashCode = cachedMethod.hashCode();
if (hashCode == 0)
hashCode = 0xcafebebe;
}
return hashCode;
}
public String toString() {
return cachedMethod.toString();
}
private static Constructor getConstructor(SoftReference ref) {
if (ref==null) return null;
return ref.get();
}
public CallSite createPogoMetaMethodSite(CallSite site, MetaClassImpl metaClass, Class[] params) {
if (!skipCompiled) {
Constructor constr = getConstructor(pogoCallSiteConstructor);
if (constr==null) {
if (CallSiteGenerator.isCompilable(this)) {
constr = CallSiteGenerator.compilePogoMethod(this);
}
if (constr != null) {
pogoCallSiteConstructor = new SoftReference (constr);
} else {
skipCompiled = true;
}
}
if (constr!=null) {
try {
return (CallSite) constr.newInstance(site, metaClass, this, params, constr);
} catch (Error e) {
skipCompiled=true;
throw e;
} catch (Throwable e) {
skipCompiled=true;
}
}
}
return new PogoMetaMethodSite.PogoCachedMethodSiteNoUnwrapNoCoerce(site, metaClass, this, params);
}
public CallSite createPojoMetaMethodSite(CallSite site, MetaClassImpl metaClass, Class[] params) {
if (!skipCompiled) {
Constructor constr = getConstructor(pojoCallSiteConstructor);
if (constr==null) {
if (CallSiteGenerator.isCompilable(this)) {
constr = CallSiteGenerator.compilePojoMethod(this);
}
if (constr != null) {
pojoCallSiteConstructor = new SoftReference (constr);
} else {
skipCompiled = true;
}
}
if (constr!=null) {
try {
return (CallSite) constr.newInstance(site, metaClass, this, params, constr);
} catch (Error e) {
skipCompiled=true;
throw e;
} catch (Throwable e) {
skipCompiled=true;
}
}
}
return new PojoMetaMethodSite.PojoCachedMethodSiteNoUnwrapNoCoerce(site, metaClass, this, params);
}
public CallSite createStaticMetaMethodSite(CallSite site, MetaClassImpl metaClass, Class[] params) {
if (!skipCompiled) {
Constructor constr = getConstructor(staticCallSiteConstructor);
if (constr==null) {
if (CallSiteGenerator.isCompilable(this)) {
constr = CallSiteGenerator.compileStaticMethod(this);
}
if (constr != null) {
staticCallSiteConstructor = new SoftReference (constr);
} else {
skipCompiled = true;
}
}
if (constr!=null) {
try {
return (CallSite) constr.newInstance(site, metaClass, this, params, constr);
} catch (Error e) {
skipCompiled=true;
throw e;
} catch (Throwable e) {
skipCompiled=true;
}
}
}
return new StaticMetaMethodSite.StaticMetaMethodSiteNoUnwrapNoCoerce(site, metaClass, this, params);
}
private static class MyComparator implements Comparator {
public int compare(Object o1, Object o2) {
if (o1 instanceof CachedMethod)
return ((CachedMethod)o1).compareTo(o2);
else if (o2 instanceof CachedMethod)
return -((CachedMethod)o2).compareTo(o1);
else
// really, this should never happen, it's evidence of corruption if it does
throw new ClassCastException("One of the two comparables must be a CachedMethod");
}
}
public Method getCachedMethod() {
return cachedMethod;
}
}