| /* |
| * Copyright 2001-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.utilities; |
| |
| public class ConstantTag { |
| // These replicated from the VM to save space |
| private static int JVM_CONSTANT_Utf8 = 1; |
| private static int JVM_CONSTANT_Unicode = 2; // unused |
| private static int JVM_CONSTANT_Integer = 3; |
| private static int JVM_CONSTANT_Float = 4; |
| private static int JVM_CONSTANT_Long = 5; |
| private static int JVM_CONSTANT_Double = 6; |
| private static int JVM_CONSTANT_Class = 7; |
| private static int JVM_CONSTANT_String = 8; |
| private static int JVM_CONSTANT_Fieldref = 9; |
| private static int JVM_CONSTANT_Methodref = 10; |
| private static int JVM_CONSTANT_InterfaceMethodref = 11; |
| private static int JVM_CONSTANT_NameAndType = 12; |
| private static int JVM_CONSTANT_Invalid = 0; // For bad value initialization |
| private static int JVM_CONSTANT_UnresolvedClass = 100; // Temporary tag until actual use |
| private static int JVM_CONSTANT_ClassIndex = 101; // Temporary tag while constructing constant pool |
| private static int JVM_CONSTANT_UnresolvedString = 102; // Temporary tag until actual use |
| private static int JVM_CONSTANT_StringIndex = 103; // Temporary tag while constructing constant pool |
| private static int JVM_CONSTANT_UnresolvedClassInError = 104; // Resolution failed |
| |
| private byte tag; |
| |
| public ConstantTag(byte tag) { |
| this.tag = tag; |
| } |
| |
| public boolean isKlass() { return tag == JVM_CONSTANT_Class; } |
| public boolean isField () { return tag == JVM_CONSTANT_Fieldref; } |
| public boolean isMethod() { return tag == JVM_CONSTANT_Methodref; } |
| public boolean isInterfaceMethod() { return tag == JVM_CONSTANT_InterfaceMethodref; } |
| public boolean isString() { return tag == JVM_CONSTANT_String; } |
| public boolean isInt() { return tag == JVM_CONSTANT_Integer; } |
| public boolean isFloat() { return tag == JVM_CONSTANT_Float; } |
| public boolean isLong() { return tag == JVM_CONSTANT_Long; } |
| public boolean isDouble() { return tag == JVM_CONSTANT_Double; } |
| public boolean isNameAndType() { return tag == JVM_CONSTANT_NameAndType; } |
| public boolean isUtf8() { return tag == JVM_CONSTANT_Utf8; } |
| |
| public boolean isInvalid() { return tag == JVM_CONSTANT_Invalid; } |
| |
| public boolean isUnresolvedKlass() { |
| return tag == JVM_CONSTANT_UnresolvedClass || tag == JVM_CONSTANT_UnresolvedClassInError; |
| } |
| public boolean isUnresolveKlassInError() { return tag == JVM_CONSTANT_UnresolvedClassInError; } |
| public boolean isKlassIndex() { return tag == JVM_CONSTANT_ClassIndex; } |
| public boolean isUnresolvedString() { return tag == JVM_CONSTANT_UnresolvedString; } |
| public boolean isStringIndex() { return tag == JVM_CONSTANT_StringIndex; } |
| |
| public boolean isKlassReference() { return isKlassIndex() || isUnresolvedKlass(); } |
| public boolean isFieldOrMethod() { return isField() || isMethod() || isInterfaceMethod(); } |
| public boolean isSymbol() { return isUtf8(); } |
| } |