/*
* Copyright (c) 2002, 2004, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
package sun.jvm.hotspot.jdi;
import com.sun.jdi.*;
import sun.jvm.hotspot.oops.ArrayKlass;
import sun.jvm.hotspot.oops.InstanceKlass;
import sun.jvm.hotspot.oops.ObjArrayKlass;
import sun.jvm.hotspot.oops.TypeArrayKlass;
import sun.jvm.hotspot.oops.Klass;
import sun.jvm.hotspot.oops.Instance;
import sun.jvm.hotspot.oops.Symbol;
import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Map;
public class ArrayTypeImpl extends ReferenceTypeImpl implements ArrayType {
protected ArrayTypeImpl(VirtualMachine aVm, ArrayKlass aRef) {
super(aVm, aRef);
}
public ArrayReference newInstance(int length) {
vm.throwNotReadOnlyException("ArrayType.newInstance(int)");
return null;
}
public String componentSignature() {
return signature().substring(1); // Just skip the leading '['
}
public String componentTypeName() {
JNITypeParser parser = new JNITypeParser(componentSignature());
return parser.typeName();
}
public ClassLoaderReference classLoader() {
if (ref() instanceof TypeArrayKlass) {
// primitive array klasses are loaded by bootstrap loader
return null;
} else {
Klass bottomKlass = ((ObjArrayKlass)ref()).getBottomKlass();
if (bottomKlass instanceof TypeArrayKlass) {
// multidimensional primitive array klasses are loaded by bootstrap loader
return null;
} else {
// class loader of any other obj array klass is same as the loader
// that loaded the bottom InstanceKlass
Instance xx = (Instance)(((InstanceKlass) bottomKlass).getClassLoader());
return vm.classLoaderMirror(xx);
}
}
}
void addVisibleMethods(Map methodMap) {
// arrays don't have methods
}
List getAllMethods() {
// arrays don't have methods
// JLS says arrays have methods of java.lang.Object. But
// JVMDI-JDI returns zero size list. We do the same here
// for consistency.
return new ArrayList(0);
}
/*
* Find the type object, if any, of a component type of this array.
* The component type does not have to be immediate; e.g. this method
* can be used to find the component Foo of Foo[][].
*/
public Type componentType() throws ClassNotLoadedException {
ArrayKlass k = (ArrayKlass) ref();
if (k instanceof ObjArrayKlass) {
Klass elementKlass = ((ObjArrayKlass)k).getElementKlass();
if (elementKlass == null) {
throw new ClassNotLoadedException(componentSignature());
} else {
return vm.referenceType(elementKlass);
}
} else {
// It's a primitive type
return vm.primitiveTypeMirror(signature().charAt(1));
}
}
static boolean isComponentAssignable(Type destination, Type source) {
if (source instanceof PrimitiveType) {
// Assignment of primitive arrays requires identical
// component types.
return source.equals(destination);
} else {
if (destination instanceof PrimitiveType) {
return false;
}
ReferenceTypeImpl refSource = (ReferenceTypeImpl)source;
ReferenceTypeImpl refDestination = (ReferenceTypeImpl)destination;
// Assignment of object arrays requires availability
// of widening conversion of component types
return refSource.isAssignableTo(refDestination);
}
}
/*
* Return true if an instance of the given reference type
* can be assigned to a variable of this type
*/
boolean isAssignableTo(ReferenceType destType) {
if (destType instanceof ArrayType) {
try {
Type destComponentType = ((ArrayType)destType).componentType();
return isComponentAssignable(destComponentType, componentType());
} catch (ClassNotLoadedException e) {
// One or both component types has not yet been
// loaded => can't assign
return false;
}
} else {
Symbol typeName = ((ReferenceTypeImpl)destType).typeNameAsSymbol();
if (destType instanceof InterfaceType) {
// Every array type implements java.io.Serializable and
// java.lang.Cloneable. fixme in JVMDI-JDI, includes only
// Cloneable but not Serializable.
return typeName.equals(vm.javaLangCloneable()) ||
typeName.equals(vm.javaIoSerializable());
} else {
// Only valid ClassType assignee is Object
return typeName.equals(vm.javaLangObject());
}
}
}
List inheritedTypes() {
// arrays are derived from java.lang.Object and
// B[] is derived from A[] if B is derived from A.
// But JVMDI-JDI returns zero sized list and we do the
// same for consistency.
return new ArrayList(0);
}
int getModifiers() {
/*
* For object arrays, the return values for Interface
* Accessible.isPrivate(), Accessible.isProtected(),
* etc... are the same as would be returned for the
* component type. Fetch the modifier bits from the
* component type and use those.
*
* For primitive arrays, the modifiers are always
* VMModifiers.FINAL | VMModifiers.PUBLIC
*
* Reference com.sun.jdi.Accessible.java.
*/
try {
Type t = componentType();
if (t instanceof PrimitiveType) {
return VMModifiers.FINAL | VMModifiers.PUBLIC;
} else {
ReferenceType rt = (ReferenceType)t;
return rt.modifiers();
}
} catch (ClassNotLoadedException cnle) {
cnle.printStackTrace();
}
return -1;
}
public String toString() {
return "array class " + name() + " (" + loaderString() + ")";
}
/*
* Save a pointless trip over the wire for these methods
* which have undefined results for arrays.
*/
public boolean isPrepared() { return true; }
public boolean isVerified() { return true; }
public boolean isInitialized() { return true; }
public boolean failedToInitialize() { return false; }
public boolean isAbstract() { return false; }
/*
* Defined always to be true for arrays
*/
public boolean isFinal() { return true; }
}