1 /* 2 * Copyright 2012, Google Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 package org.jf.dexlib2.util; 33 34 import org.jf.dexlib2.AccessFlags; 35 import org.jf.dexlib2.iface.ClassDef; 36 import org.jf.dexlib2.iface.reference.TypeReference; 37 38 import javax.annotation.Nonnull; 39 40 public final class TypeUtils { isWideType(@onnull String type)41 public static boolean isWideType(@Nonnull String type) { 42 char c = type.charAt(0); 43 return c == 'J' || c == 'D'; 44 } 45 isWideType(@onnull TypeReference type)46 public static boolean isWideType(@Nonnull TypeReference type) { 47 return isWideType(type.getType()); 48 } 49 isPrimitiveType(String type)50 public static boolean isPrimitiveType(String type) { 51 return type.length() == 1; 52 } 53 54 @Nonnull getPackage(@onnull String type)55 public static String getPackage(@Nonnull String type) { 56 int lastSlash = type.lastIndexOf('/'); 57 if (lastSlash < 0) { 58 return ""; 59 } 60 return type.substring(1, lastSlash); 61 } 62 canAccessClass(@onnull String accessorType, @Nonnull ClassDef accesseeClassDef)63 public static boolean canAccessClass(@Nonnull String accessorType, @Nonnull ClassDef accesseeClassDef) { 64 if (AccessFlags.PUBLIC.isSet(accesseeClassDef.getAccessFlags())) { 65 return true; 66 } 67 68 // Classes can only be public or package private. Any private or protected inner classes are actually 69 // package private. 70 return getPackage(accesseeClassDef.getType()).equals(getPackage(accessorType)); 71 } 72 TypeUtils()73 private TypeUtils() {} 74 } 75