1 /* 2 * Copyright (C) 2010 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 android.mtp; 18 19 /** 20 * Encapsulates the ObjectPropList dataset used by the GetObjectPropList command. 21 * The fields of this class are read by JNI code in android_media_MtpDatabase.cpp 22 */ 23 24 class MtpPropertyList { 25 26 // number of results returned 27 private int mCount; 28 // maximum number of results 29 private final int mMaxCount; 30 // result code for GetObjectPropList 31 public int mResult; 32 // list of object handles (first field in quadruplet) 33 public final int[] mObjectHandles; 34 // list of object propery codes (second field in quadruplet) 35 public final int[] mPropertyCodes; 36 // list of data type codes (third field in quadruplet) 37 public final int[] mDataTypes; 38 // list of long int property values (fourth field in quadruplet, when value is integer type) 39 public long[] mLongValues; 40 // list of long int property values (fourth field in quadruplet, when value is string type) 41 public String[] mStringValues; 42 43 // constructor only called from MtpDatabase 44 public MtpPropertyList(int maxCount, int result) { 45 mMaxCount = maxCount; 46 mResult = result; 47 mObjectHandles = new int[maxCount]; 48 mPropertyCodes = new int[maxCount]; 49 mDataTypes = new int[maxCount]; 50 // mLongValues and mStringValues are created lazily since both might not be necessary 51 } 52 53 public void append(int handle, int property, int type, long value) { 54 int index = mCount++; 55 if (mLongValues == null) { 56 mLongValues = new long[mMaxCount]; 57 } 58 mObjectHandles[index] = handle; 59 mPropertyCodes[index] = property; 60 mDataTypes[index] = type; 61 mLongValues[index] = value; 62 } 63 64 public void append(int handle, int property, String value) { 65 int index = mCount++; 66 if (mStringValues == null) { 67 mStringValues = new String[mMaxCount]; 68 } 69 mObjectHandles[index] = handle; 70 mPropertyCodes[index] = property; 71 mDataTypes[index] = MtpConstants.TYPE_STR; 72 mStringValues[index] = value; 73 } 74 75 public void setResult(int result) { 76 mResult = result; 77 } 78 } 79
