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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.mtp;
     18 
     19 import java.util.Objects;
     20 import static com.android.mtp.MtpDatabaseConstants.DocumentType;
     21 
     22 /**
     23  * Static utilities for ID.
     24  */
     25 class Identifier {
     26     final int mDeviceId;
     27     final int mStorageId;
     28     final int mObjectHandle;
     29     final String mDocumentId;
     30     final @DocumentType int mDocumentType;
     31 
     32     Identifier(int deviceId, int storageId, int objectHandle, String documentId,
     33             @DocumentType int documentType) {
     34         mDeviceId = deviceId;
     35         mStorageId = storageId;
     36         mObjectHandle = objectHandle;
     37         mDocumentId = documentId;
     38         mDocumentType = documentType;
     39     }
     40 
     41     @Override
     42     public boolean equals(Object obj) {
     43         if (!(obj instanceof Identifier))
     44             return false;
     45         final Identifier other = (Identifier) obj;
     46         return mDeviceId == other.mDeviceId && mStorageId == other.mStorageId &&
     47                 mObjectHandle == other.mObjectHandle && mDocumentId.equals(other.mDocumentId);
     48     }
     49 
     50     @Override
     51     public int hashCode() {
     52         return Objects.hash(mDeviceId, mStorageId, mObjectHandle, mDocumentId);
     53     }
     54 
     55     @Override
     56     public String toString() {
     57         final StringBuilder builder = new StringBuilder();
     58         builder.append("Identifier { ");
     59 
     60         builder.append("mDeviceId: ");
     61         builder.append(mDeviceId);
     62         builder.append(", ");
     63 
     64         builder.append("mStorageId: ");
     65         builder.append(mStorageId);
     66         builder.append(", ");
     67 
     68         builder.append("mObjectHandle: ");
     69         builder.append(mObjectHandle);
     70         builder.append(", ");
     71 
     72         builder.append("mDocumentId: ");
     73         builder.append(mDocumentId);
     74         builder.append(", ");
     75 
     76         builder.append("mDocumentType: ");
     77         builder.append(mDocumentType);
     78         builder.append(" }");
     79         return builder.toString();
     80     }
     81 }
     82