| /* |
| * Copyright (c) 2000, 2011, 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.oops; |
| |
| import java.io.*; |
| import sun.jvm.hotspot.runtime.BasicType; |
| import sun.jvm.hotspot.utilities.*; |
| |
| public class FieldType { |
| |
| private Symbol signature; |
| private char first; |
| |
| public FieldType(Symbol signature) { |
| this.signature = signature; |
| this.first = (char) signature.getByteAt(0); |
| if (Assert.ASSERTS_ENABLED) { |
| switch (this.first) { |
| case 'B': |
| case 'C': |
| case 'D': |
| case 'F': |
| case 'I': |
| case 'J': |
| case 'S': |
| case 'Z': |
| case 'L': |
| case '[': |
| break; // Ok. signature char known |
| default: |
| Assert.that(false, "Unknown char in field signature \"" + signature.asString() + "\": " + this.first); |
| } |
| } |
| } |
| |
| public boolean isOop() { return isObject() || isArray(); } |
| public boolean isByte() { return first == 'B'; } |
| public boolean isChar() { return first == 'C'; } |
| public boolean isDouble() { return first == 'D'; } |
| public boolean isFloat() { return first == 'F'; } |
| public boolean isInt() { return first == 'I'; } |
| public boolean isLong() { return first == 'J'; } |
| public boolean isShort() { return first == 'S'; } |
| public boolean isBoolean() { return first == 'Z'; } |
| public boolean isObject() { return first == 'L'; } |
| public boolean isArray() { return first == '['; } |
| |
| public Symbol getSignature() { return signature; } |
| |
| public static class ArrayInfo { |
| private int dimension; |
| private int elementBasicType; // See BasicType.java |
| // FIXME: consider adding name of element class |
| |
| public ArrayInfo(int dimension, int elementBasicType) { |
| this.dimension = dimension; |
| this.elementBasicType = elementBasicType; |
| } |
| |
| public int dimension() { return dimension; } |
| /** See BasicType.java */ |
| public int elementBasicType() { return elementBasicType; } |
| } |
| |
| /** Only valid for T_ARRAY; throws unspecified exception otherwise */ |
| public ArrayInfo getArrayInfo() { |
| int index = 1; |
| int dim = 1; |
| index = skipOptionalSize(signature, index); |
| while (signature.getByteAt(index) == '[') { |
| index++; |
| dim++; |
| skipOptionalSize(signature, index); |
| } |
| int elementType = BasicType.charToType((char) signature.getByteAt(index)); |
| return new ArrayInfo(dim, elementType); |
| } |
| |
| private int skipOptionalSize(Symbol sig, int index) { |
| byte c = sig.getByteAt(index); |
| while (c >= '0' && c <= '9') { |
| ++index; |
| c = sig.getByteAt(index); |
| } |
| return index; |
| } |
| } |