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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 | +} | |