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| 1 | /* | ||
| 2 | * Copyright (c) 1998, 2001, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package com.sun.tools.jdi; | ||
| 27 | |||
| 28 | import com.sun.jdi.*; | ||
| 29 | |||
| 30 | import java.util.List; | ||
| 31 | import java.util.ArrayList; | ||
| 32 | import java.util.Iterator; | ||
| 33 | import java.util.Map; | ||
| 34 | |||
| 35 | public class ArrayTypeImpl extends ReferenceTypeImpl | ||
| 36 | implements ArrayType | ||
| 37 | { | ||
| 38 | protected ArrayTypeImpl(VirtualMachine aVm, long aRef) { | ||
| 39 | super(aVm, aRef); | ||
| 40 | } | ||
| 41 | |||
| 42 | public ArrayReference newInstance(int length) { | ||
| 43 | try { | ||
| 44 | return (ArrayReference)JDWP.ArrayType.NewInstance. | ||
| 45 | process(vm, this, length).newArray; | ||
| 46 | } catch (JDWPException exc) { | ||
| 47 | throw exc.toJDIException(); | ||
| 48 | } | ||
| 49 | } | ||
| 50 | |||
| 51 | public String componentSignature() { | ||
| 52 | return signature().substring(1); // Just skip the leading '[' | ||
| 53 | } | ||
| 54 | |||
| 55 | public String componentTypeName() { | ||
| 56 | JNITypeParser parser = new JNITypeParser(componentSignature()); | ||
| 57 | return parser.typeName(); | ||
| 58 | } | ||
| 59 | |||
| 60 | Type type() throws ClassNotLoadedException { | ||
| 61 | return findType(componentSignature()); | ||
| 62 | } | ||
| 63 | |||
| 64 | void addVisibleMethods(Map map) { | ||
| 65 | // arrays don't have methods | ||
| 66 | } | ||
| 67 | |||
| 68 | public List<Method> allMethods() { | ||
| 69 | return new ArrayList<Method>(0); // arrays don't have methods | ||
| 70 | } | ||
| 71 | |||
| 72 | /* | ||
| 73 | * Find the type object, if any, of a component type of this array. | ||
| 74 | * The component type does not have to be immediate; e.g. this method | ||
| 75 | * can be used to find the component Foo of Foo[][]. This method takes | ||
| 76 | * advantage of the property that an array and its component must have | ||
| 77 | * the same class loader. Since array set operations don't have an | ||
| 78 | * implicit enclosing type like field and variable set operations, | ||
| 79 | * this method is sometimes needed for proper type checking. | ||
| 80 | */ | ||
| 81 | Type findComponentType(String signature) throws ClassNotLoadedException { | ||
| 82 | byte tag = (byte)signature.charAt(0); | ||
| 83 | if (PacketStream.isObjectTag(tag)) { | ||
| 84 | // It's a reference type | ||
| 85 | JNITypeParser parser = new JNITypeParser(componentSignature()); | ||
| 86 | List list = vm.classesByName(parser.typeName()); | ||
| 87 | Iterator iter = list.iterator(); | ||
| 88 | while (iter.hasNext()) { | ||
| 89 | ReferenceType type = (ReferenceType)iter.next(); | ||
| 90 | ClassLoaderReference cl = type.classLoader(); | ||
| 91 | if ((cl == null)? | ||
| 92 | (classLoader() == null) : | ||
| 93 | (cl.equals(classLoader()))) { | ||
| 94 | return type; | ||
| 95 | } | ||
| 96 | } | ||
| 97 | // Component class has not yet been loaded | ||
| 98 | throw new ClassNotLoadedException(componentTypeName()); | ||
| 99 | } else { | ||
| 100 | // It's a primitive type | ||
| 101 | return vm.primitiveTypeMirror(tag); | ||
| 102 | } | ||
| 103 | } | ||
| 104 | |||
| 105 | public Type componentType() throws ClassNotLoadedException { | ||
| 106 | return findComponentType(componentSignature()); | ||
| 107 | } | ||
| 108 | |||
| 109 | static boolean isComponentAssignable(Type destination, Type source) { | ||
| 110 | if (source instanceof PrimitiveType) { | ||
| 111 | // Assignment of primitive arrays requires identical | ||
| 112 | // component types. | ||
| 113 | return source.equals(destination); | ||
| 114 | } else { | ||
| 115 | if (destination instanceof PrimitiveType) { | ||
| 116 | return false; | ||
| 117 | } | ||
| 118 | |||
| 119 | ReferenceTypeImpl refSource = (ReferenceTypeImpl)source; | ||
| 120 | ReferenceTypeImpl refDestination = (ReferenceTypeImpl)destination; | ||
| 121 | // Assignment of object arrays requires availability | ||
| 122 | // of widening conversion of component types | ||
| 123 | return refSource.isAssignableTo(refDestination); | ||
| 124 | } | ||
| 125 | } | ||
| 126 | |||
| 127 | /* | ||
| 128 | * Return true if an instance of the given reference type | ||
| 129 | * can be assigned to a variable of this type | ||
| 130 | */ | ||
| 131 | boolean isAssignableTo(ReferenceType destType) { | ||
| 132 | if (destType instanceof ArrayType) { | ||
| 133 | try { | ||
| 134 | Type destComponentType = ((ArrayType)destType).componentType(); | ||
| 135 | return isComponentAssignable(destComponentType, componentType()); | ||
| 136 | } catch (ClassNotLoadedException e) { | ||
| 137 | // One or both component types has not yet been | ||
| 138 | // loaded => can't assign | ||
| 139 | return false; | ||
| 140 | } | ||
| 141 | } else if (destType instanceof InterfaceType) { | ||
| 142 | // Only valid InterfaceType assignee is Cloneable | ||
| 143 | return destType.name().equals("java.lang.Cloneable"); | ||
| 144 | } else { | ||
| 145 | // Only valid ClassType assignee is Object | ||
| 146 | return destType.name().equals("java.lang.Object"); | ||
| 147 | } | ||
| 148 | } | ||
| 149 | |||
| 150 | List<ReferenceType> inheritedTypes() { | ||
| 151 | return new ArrayList<ReferenceType>(0); | ||
| 152 | } | ||
| 153 | |||
| 154 | void getModifiers() { | ||
| 155 | if (modifiers != -1) { | ||
| 156 | return; | ||
| 157 | } | ||
| 158 | /* | ||
| 159 | * For object arrays, the return values for Interface | ||
| 160 | * Accessible.isPrivate(), Accessible.isProtected(), | ||
| 161 | * etc... are the same as would be returned for the | ||
| 162 | * component type. Fetch the modifier bits from the | ||
| 163 | * component type and use those. | ||
| 164 | * | ||
| 165 | * For primitive arrays, the modifiers are always | ||
| 166 | * VMModifiers.FINAL | VMModifiers.PUBLIC | ||
| 167 | * | ||
| 168 | * Reference com.sun.jdi.Accessible.java. | ||
| 169 | */ | ||
| 170 | try { | ||
| 171 | Type t = componentType(); | ||
| 172 | if (t instanceof PrimitiveType) { | ||
| 173 | modifiers = VMModifiers.FINAL | VMModifiers.PUBLIC; | ||
| 174 | } else { | ||
| 175 | ReferenceType rt = (ReferenceType)t; | ||
| 176 | modifiers = rt.modifiers(); | ||
| 177 | } | ||
| 178 | } catch (ClassNotLoadedException cnle) { | ||
| 179 | cnle.printStackTrace(); | ||
| 180 | } | ||
| 181 | } | ||
| 182 | |||
| 183 | public String toString() { | ||
| 184 | return "array class " + name() + " (" + loaderString() + ")"; | ||
| 185 | } | ||
| 186 | |||
| 187 | /* | ||
| 188 | * Save a pointless trip over the wire for these methods | ||
| 189 | * which have undefined results for arrays. | ||
| 190 | */ | ||
| 191 | public boolean isPrepared() { return true; } | ||
| 192 | public boolean isVerified() { return true; } | ||
| 193 | public boolean isInitialized() { return true; } | ||
| 194 | public boolean failedToInitialize() { return false; } | ||
| 195 | public boolean isAbstract() { return false; } | ||
| 196 | |||
| 197 | /* | ||
| 198 | * Defined always to be true for arrays | ||
| 199 | */ | ||
| 200 | public boolean isFinal() { return true; } | ||
| 201 | } | ||