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      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;
     33 
     34 import org.jf.dexlib2.iface.reference.*;
     35 import org.jf.util.ExceptionWithContext;
     36 
     37 public final class ReferenceType {
     38     public static final int STRING = 0;
     39     public static final int TYPE = 1;
     40     public static final int FIELD = 2;
     41     public static final int METHOD = 3;
     42     public static final int NONE = 4;
     43 
     44     public static String toString(int referenceType) {
     45         switch (referenceType) {
     46             case STRING:
     47                 return "string";
     48             case TYPE:
     49                 return "type";
     50             case FIELD:
     51                 return "field";
     52             case METHOD:
     53                 return "method";
     54             default:
     55                 throw new InvalidReferenceTypeException(referenceType);
     56         }
     57     }
     58 
     59     public static int getReferenceType(Reference reference) {
     60         if (reference instanceof StringReference) {
     61             return STRING;
     62         } else if (reference instanceof TypeReference) {
     63             return TYPE;
     64         } else if (reference instanceof FieldReference) {
     65             return FIELD;
     66         } else if (reference instanceof MethodReference) {
     67             return METHOD;
     68         } else {
     69             throw new IllegalStateException("Invalid reference");
     70         }
     71     }
     72 
     73     /**
     74      * Validate a specific reference type. Note that the NONE placeholder is specifically not considered valid here.
     75      *
     76      * @throws InvalidReferenceTypeException
     77      */
     78     public static void validateReferenceType(int referenceType) {
     79         if (referenceType < 0 || referenceType > 3) {
     80             throw new InvalidReferenceTypeException(referenceType);
     81         }
     82     }
     83 
     84     public static class InvalidReferenceTypeException extends ExceptionWithContext {
     85         private final int referenceType;
     86 
     87         public InvalidReferenceTypeException(int referenceType) {
     88             super("Invalid reference type: %d", referenceType);
     89             this.referenceType = referenceType;
     90         }
     91 
     92         public InvalidReferenceTypeException(int referenceType, String message, Object... formatArgs) {
     93             super(message, formatArgs);
     94             this.referenceType = referenceType;
     95         }
     96 
     97         public int getReferenceType() {
     98             return referenceType;
     99         }
    100     }
    101 
    102     private ReferenceType() {}
    103 }