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Groovy: A powerful multi-faceted 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.runtime.callsite;
import groovy.lang.GroovyObject;
import groovy.lang.GroovyRuntimeException;
import groovy.lang.MetaClass;
import groovy.lang.MetaClassImpl;
import groovy.lang.MetaProperty;
import groovy.transform.Internal;
import org.codehaus.groovy.reflection.CachedClass;
import org.codehaus.groovy.reflection.CachedField;
import org.codehaus.groovy.reflection.ParameterTypes;
import org.codehaus.groovy.runtime.ArrayUtil;
import org.codehaus.groovy.runtime.GroovyCategorySupport;
import org.codehaus.groovy.runtime.InvokerHelper;
import org.codehaus.groovy.runtime.NullObject;
import org.codehaus.groovy.runtime.ScriptBytecodeAdapter;
import org.codehaus.groovy.runtime.wrappers.Wrapper;
import java.lang.reflect.Method;
/**
* Base class for all call sites.
*/
public class AbstractCallSite implements CallSite {
protected final int index;
protected final String name;
protected final CallSiteArray array;
public AbstractCallSite(final CallSiteArray array, final int index, final String name) {
this.name = name;
this.index = index;
this.array = array;
}
public AbstractCallSite(final CallSite prev) {
this.name = prev.getName();
this.index = prev.getIndex();
this.array = prev.getArray();
}
@Override
public int getIndex() {
return index;
}
@Override
public CallSiteArray getArray() {
return array;
}
@Override
public String getName() {
return name;
}
@Override
public final Object callSafe(final Object receiver, final Object[] args) throws Throwable {
if (receiver == null)
return null;
return call(receiver, args);
}
@Override
public final Object callSafe(final Object receiver) throws Throwable {
if (receiver == null)
return null;
return call(receiver);
}
@Override
public final Object callSafe(final Object receiver, final Object arg1) throws Throwable {
if (receiver == null)
return null;
return call(receiver, arg1);
}
@Override
public final Object callSafe(final Object receiver, final Object arg1, final Object arg2) throws Throwable {
if (receiver == null)
return null;
return call(receiver, arg1, arg2);
}
@Override
public final Object callSafe(final Object receiver, final Object arg1, final Object arg2, final Object arg3) throws Throwable {
if (receiver == null)
return null;
return call(receiver, arg1, arg2, arg3);
}
@Override
public Object callSafe(final Object receiver, final Object arg1, final Object arg2, final Object arg3, final Object arg4) throws Throwable {
if (receiver == null)
return null;
return call(receiver, arg1, arg2, arg3, arg4);
}
@Override
public Object call(final Object receiver, final Object[] args) throws Throwable {
return CallSiteArray.defaultCall(this, receiver, args);
}
@Override
public Object call(final Object receiver) throws Throwable {
return call(receiver, CallSiteArray.NOPARAM);
}
@Override
public Object call(final Object receiver, final Object arg1) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.call(receiver, arg1);
}
return call(receiver, ArrayUtil.createArray(arg1));
}
@Override
public Object call(final Object receiver, final Object arg1, final Object arg2) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.call(receiver, arg1, arg2);
}
return call(receiver, ArrayUtil.createArray(arg1, arg2));
}
@Override
public Object call(final Object receiver, final Object arg1, final Object arg2, final Object arg3) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.call(receiver, arg1, arg2, arg3);
}
return call(receiver, ArrayUtil.createArray(arg1, arg2, arg3));
}
@Override
public Object call(final Object receiver, final Object arg1, final Object arg2, final Object arg3, final Object arg4) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.call(receiver, arg1, arg2, arg3, arg4);
}
return call(receiver, ArrayUtil.createArray(arg1, arg2, arg3, arg4));
}
@Override
public Object callCurrent(final GroovyObject receiver, final Object[] args) throws Throwable {
return CallSiteArray.defaultCallCurrent(this, receiver, args);
}
@Override
public Object callCurrent(final GroovyObject receiver) throws Throwable {
return callCurrent(receiver, CallSiteArray.NOPARAM);
}
@Override
public Object callCurrent(final GroovyObject receiver, final Object arg1) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.callCurrent(receiver, arg1);
}
return callCurrent(receiver, ArrayUtil.createArray(arg1));
}
@Override
public Object callCurrent(final GroovyObject receiver, final Object arg1, final Object arg2) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.callCurrent(receiver, arg1, arg2);
}
return callCurrent(receiver, ArrayUtil.createArray(arg1, arg2));
}
@Override
public Object callCurrent(final GroovyObject receiver, final Object arg1, final Object arg2, final Object arg3) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.callCurrent(receiver, arg1, arg2, arg3);
}
return callCurrent(receiver, ArrayUtil.createArray(arg1, arg2, arg3));
}
@Override
public Object callCurrent(final GroovyObject receiver, final Object arg1, final Object arg2, final Object arg3, final Object arg4) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.callCurrent(receiver, arg1, arg2, arg3, arg4);
}
return callCurrent(receiver, ArrayUtil.createArray(arg1, arg2, arg3, arg4));
}
@Override
public Object callStatic(final Class receiver, final Object[] args) throws Throwable {
return CallSiteArray.defaultCallStatic(this, receiver, args);
}
@Override
public Object callStatic(final Class receiver) throws Throwable {
return callStatic(receiver, CallSiteArray.NOPARAM);
}
@Override
public Object callStatic(final Class receiver, final Object arg1) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.callStatic(receiver, arg1);
}
return callStatic(receiver, ArrayUtil.createArray(arg1));
}
@Override
public Object callStatic(final Class receiver, final Object arg1, final Object arg2) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.callStatic(receiver, arg1, arg2);
}
return callStatic(receiver, ArrayUtil.createArray(arg1, arg2));
}
@Override
public Object callStatic(final Class receiver, final Object arg1, final Object arg2, final Object arg3) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.callStatic(receiver, arg1, arg2, arg3);
}
return callStatic(receiver, ArrayUtil.createArray(arg1, arg2, arg3));
}
@Override
public Object callStatic(final Class receiver, final Object arg1, final Object arg2, final Object arg3, final Object arg4) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.callStatic(receiver, arg1, arg2, arg3, arg4);
}
return callStatic(receiver, ArrayUtil.createArray(arg1, arg2, arg3, arg4));
}
@Override
public Object callConstructor(final Object receiver, final Object[] args) throws Throwable {
return CallSiteArray.defaultCallConstructor(this, receiver, args);
}
@Override
public Object callConstructor(final Object receiver) throws Throwable {
return callConstructor(receiver, CallSiteArray.NOPARAM);
}
@Override
public Object callConstructor(final Object receiver, final Object arg1) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.callConstructor(receiver, arg1);
}
return callConstructor(receiver, ArrayUtil.createArray(arg1));
}
@Override
public Object callConstructor(final Object receiver, final Object arg1, final Object arg2) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.callConstructor(receiver, arg1, arg2);
}
return callConstructor(receiver, ArrayUtil.createArray(arg1, arg2));
}
@Override
public Object callConstructor(final Object receiver, final Object arg1, final Object arg2, final Object arg3) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.callConstructor(receiver, arg1, arg2, arg3);
}
return callConstructor(receiver, ArrayUtil.createArray(arg1, arg2, arg3));
}
@Override
public Object callConstructor(final Object receiver, final Object arg1, final Object arg2, final Object arg3, final Object arg4) throws Throwable {
CallSite stored = array.array[index];
if (stored!=this) {
return stored.callConstructor(receiver, arg1, arg2, arg3, arg4);
}
return callConstructor(receiver, ArrayUtil.createArray(arg1, arg2, arg3, arg4));
}
static boolean noCoerce(final ParameterTypes metaMethod, final Object[] args) {
final CachedClass[] paramClasses = metaMethod.getParameterTypes();
if (paramClasses.length != args.length)
return false;
for (int i = 0; i < paramClasses.length; i++) {
CachedClass paramClass = paramClasses[i];
if (args[i] != null && !paramClass.isDirectlyAssignable(args[i]))
return true;
}
return false;
}
static boolean noWrappers(final Object[] args) {
for (int i = 0; i != args.length; i += 1)
if (args[i] instanceof Wrapper)
return false;
return true;
}
@Override
public Object callGetProperty(final Object receiver) throws Throwable {
return acceptGetProperty(receiver).getProperty(receiver);
}
@Override
public Object callGroovyObjectGetProperty(final Object receiver) throws Throwable {
if (receiver == null) {
try {
return InvokerHelper.getProperty(NullObject.getNullObject(), name);
} catch (GroovyRuntimeException gre) {
throw ScriptBytecodeAdapter.unwrap(gre);
}
} else {
return acceptGroovyObjectGetProperty(receiver).getProperty(receiver);
}
}
public CallSite acceptGetProperty(final Object receiver) {
return createGetPropertySite(receiver);
}
public CallSite acceptGroovyObjectGetProperty(final Object receiver) {
return createGroovyObjectGetPropertySite(receiver);
}
protected final CallSite createGetPropertySite(final Object receiver) {
if (receiver == null) {
return new NullCallSite(this);
} else if (receiver instanceof GroovyObject) {
return createGroovyObjectGetPropertySite(receiver);
} else if (receiver instanceof Class) {
return createClassMetaClassGetPropertySite((Class) receiver);
}
return createPojoMetaClassGetPropertySite(receiver);
}
protected final CallSite createGroovyObjectGetPropertySite(final Object receiver) {
Class aClass = receiver.getClass();
try {
final Method method = aClass.getMethod("getProperty", String.class);
if (method != null && (method.isSynthetic() || isMarkedInternal(method)) && ((GroovyObject) receiver).getMetaClass() instanceof MetaClassImpl)
return createPogoMetaClassGetPropertySite((GroovyObject) receiver);
} catch (NoSuchMethodException e) {
// fall threw
}
if (receiver instanceof Class) {
return createClassMetaClassGetPropertySite((Class) receiver);
} else {
return createPogoGetPropertySite(aClass);
}
}
private boolean isMarkedInternal(final Method method) {
return method.getAnnotation(Internal.class) != null;
}
@Override
public Object getProperty(final Object receiver) throws Throwable {
throw new UnsupportedOperationException();
}
private CallSite createPojoMetaClassGetPropertySite(final Object receiver) {
final MetaClass metaClass = InvokerHelper.getMetaClass(receiver);
CallSite site;
if (metaClass.getClass() != MetaClassImpl.class || GroovyCategorySupport.hasCategoryInCurrentThread()) {
site = new PojoMetaClassGetPropertySite(this);
} else {
final MetaProperty effective = ((MetaClassImpl) metaClass).getEffectiveGetMetaProperty(receiver.getClass(), receiver, name, false);
if (effective != null) {
if (effective instanceof CachedField)
site = new GetEffectivePojoFieldSite(this, (MetaClassImpl) metaClass, (CachedField) effective);
else
site = new GetEffectivePojoPropertySite(this, (MetaClassImpl) metaClass, effective);
} else {
site = new PojoMetaClassGetPropertySite(this);
}
}
array.array[index] = site;
return site;
}
private CallSite createClassMetaClassGetPropertySite(final Class aClass) {
CallSite site = new ClassMetaClassGetPropertySite(this, aClass);
array.array[index] = site;
return site;
}
private CallSite createPogoMetaClassGetPropertySite(final GroovyObject receiver) {
MetaClass metaClass = receiver.getMetaClass();
CallSite site;
if (metaClass.getClass() != MetaClassImpl.class || GroovyCategorySupport.hasCategoryInCurrentThread()) {
site = new PogoMetaClassGetPropertySite(this, metaClass);
} else {
final MetaProperty effective = ((MetaClassImpl) metaClass).getEffectiveGetMetaProperty(this.array.owner, receiver, name, false);
if (effective != null) {
if (effective instanceof CachedField)
site = new GetEffectivePogoFieldSite(this, metaClass, (CachedField) effective);
else
site = new GetEffectivePogoPropertySite(this, metaClass, effective);
} else {
site = new PogoMetaClassGetPropertySite(this, metaClass);
}
}
array.array[index] = site;
return site;
}
private CallSite createPogoGetPropertySite(final Class aClass) {
CallSite site = new PogoGetPropertySite(this, aClass);
array.array[index] = site;
return site;
}
@Override
public final Object callGetPropertySafe(final Object receiver) throws Throwable {
if (receiver == null) return null;
return callGetProperty(receiver);
}
@Override
public final Object callGroovyObjectGetPropertySafe(final Object receiver) throws Throwable {
if (receiver == null) return null;
return callGroovyObjectGetProperty(receiver);
}
}