1 /* 2 * Copyright (C) 2013 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.documentsui; 18 19 import static com.android.documentsui.Shared.DEBUG; 20 import static com.android.documentsui.Shared.TAG; 21 import static com.android.documentsui.model.DocumentInfo.getCursorLong; 22 import static com.android.documentsui.model.DocumentInfo.getCursorString; 23 24 import android.database.AbstractCursor; 25 import android.database.Cursor; 26 import android.os.Bundle; 27 import android.provider.DocumentsContract.Document; 28 import android.util.Log; 29 30 /** 31 * Cursor wrapper that filters MIME types not matching given list. 32 */ 33 public class FilteringCursorWrapper extends AbstractCursor { 34 private final Cursor mCursor; 35 36 private final int[] mPosition; 37 private int mCount; 38 39 public FilteringCursorWrapper(Cursor cursor, String[] acceptMimes) { 40 this(cursor, acceptMimes, null, Long.MIN_VALUE); 41 } 42 43 public FilteringCursorWrapper(Cursor cursor, String[] acceptMimes, String[] rejectMimes) { 44 this(cursor, acceptMimes, rejectMimes, Long.MIN_VALUE); 45 } 46 47 public FilteringCursorWrapper( 48 Cursor cursor, String[] acceptMimes, String[] rejectMimes, long rejectBefore) { 49 mCursor = cursor; 50 51 final int count = cursor.getCount(); 52 mPosition = new int[count]; 53 54 cursor.moveToPosition(-1); 55 while (cursor.moveToNext() && mCount < count) { 56 final String mimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE); 57 final long lastModified = getCursorLong(cursor, Document.COLUMN_LAST_MODIFIED); 58 if (rejectMimes != null && MimePredicate.mimeMatches(rejectMimes, mimeType)) { 59 continue; 60 } 61 if (lastModified < rejectBefore) { 62 continue; 63 } 64 if (MimePredicate.mimeMatches(acceptMimes, mimeType)) { 65 mPosition[mCount++] = cursor.getPosition(); 66 } 67 } 68 69 if (DEBUG && mCount != cursor.getCount()) { 70 Log.d(TAG, "Before filtering " + cursor.getCount() + ", after " + mCount); 71 } 72 } 73 74 @Override 75 public Bundle getExtras() { 76 return mCursor.getExtras(); 77 } 78 79 @Override 80 public void close() { 81 super.close(); 82 mCursor.close(); 83 } 84 85 @Override 86 public boolean onMove(int oldPosition, int newPosition) { 87 return mCursor.moveToPosition(mPosition[newPosition]); 88 } 89 90 @Override 91 public String[] getColumnNames() { 92 return mCursor.getColumnNames(); 93 } 94 95 @Override 96 public int getCount() { 97 return mCount; 98 } 99 100 @Override 101 public double getDouble(int column) { 102 return mCursor.getDouble(column); 103 } 104 105 @Override 106 public float getFloat(int column) { 107 return mCursor.getFloat(column); 108 } 109 110 @Override 111 public int getInt(int column) { 112 return mCursor.getInt(column); 113 } 114 115 @Override 116 public long getLong(int column) { 117 return mCursor.getLong(column); 118 } 119 120 @Override 121 public short getShort(int column) { 122 return mCursor.getShort(column); 123 } 124 125 @Override 126 public String getString(int column) { 127 return mCursor.getString(column); 128 } 129 130 @Override 131 public int getType(int column) { 132 return mCursor.getType(column); 133 } 134 135 @Override 136 public boolean isNull(int column) { 137 return mCursor.isNull(column); 138 } 139 } 140
