1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2009 Eric Lafortune (eric (at) graphics.cornell.edu) 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the Free 9 * Software Foundation; either version 2 of the License, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, write to the Free Software Foundation, Inc., 19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 package proguard.classfile.editor; 22 23 import proguard.classfile.attribute.*; 24 25 /** 26 * This class can add local variables to a given local variable type table 27 * attribute. 28 * Local variable types to be added must have been filled out beforehand. 29 * 30 * @author Eric Lafortune 31 */ 32 public class LocalVariableTypeTableAttributeEditor 33 { 34 private LocalVariableTypeTableAttribute targetLocalVariableTypeTableAttribute; 35 36 37 /** 38 * Creates a new LocalVariableTypeTableAttributeEditor that will edit line numbers 39 * in the given line number table attribute. 40 */ 41 public LocalVariableTypeTableAttributeEditor(LocalVariableTypeTableAttribute targetLocalVariableTypeTableAttribute) 42 { 43 this.targetLocalVariableTypeTableAttribute = targetLocalVariableTypeTableAttribute; 44 } 45 46 47 /** 48 * Adds a given line number to the line number table attribute. 49 */ 50 public void addLocalVariableTypeInfo(LocalVariableTypeInfo localVariableTypeInfo) 51 { 52 int localVariableTypeTableLength = targetLocalVariableTypeTableAttribute.u2localVariableTypeTableLength; 53 LocalVariableTypeInfo[] localVariableTypeTable = targetLocalVariableTypeTableAttribute.localVariableTypeTable; 54 55 // Make sure there is enough space for the new localVariableTypeInfo. 56 if (localVariableTypeTable.length <= localVariableTypeTableLength) 57 { 58 targetLocalVariableTypeTableAttribute.localVariableTypeTable = new LocalVariableTypeInfo[localVariableTypeTableLength+1]; 59 System.arraycopy(localVariableTypeTable, 0, 60 targetLocalVariableTypeTableAttribute.localVariableTypeTable, 0, 61 localVariableTypeTableLength); 62 localVariableTypeTable = targetLocalVariableTypeTableAttribute.localVariableTypeTable; 63 } 64 65 // Add the localVariableTypeInfo. 66 localVariableTypeTable[targetLocalVariableTypeTableAttribute.u2localVariableTypeTableLength++] = localVariableTypeInfo; 67 } 68 }