1 /* 2 * Copyright (C) 2017 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 package com.android.dialer.calllog.datasources.util; 17 18 import android.content.ContentValues; 19 import com.android.dialer.common.Assert; 20 import java.util.Iterator; 21 import java.util.List; 22 import java.util.Objects; 23 24 /** Convenience class for aggregating row values. */ 25 public class RowCombiner { 26 private final List<ContentValues> individualRowsSortedByTimestampDesc; 27 private final ContentValues combinedRow = new ContentValues(); 28 RowCombiner(List<ContentValues> individualRowsSortedByTimestampDesc)29 public RowCombiner(List<ContentValues> individualRowsSortedByTimestampDesc) { 30 Assert.checkArgument(!individualRowsSortedByTimestampDesc.isEmpty()); 31 this.individualRowsSortedByTimestampDesc = individualRowsSortedByTimestampDesc; 32 } 33 34 /** Use the most recent value for the specified column. */ useMostRecentInt(String columnName)35 public RowCombiner useMostRecentInt(String columnName) { 36 combinedRow.put( 37 columnName, individualRowsSortedByTimestampDesc.get(0).getAsInteger(columnName)); 38 return this; 39 } 40 41 /** Use the most recent value for the specified column. */ useMostRecentLong(String columnName)42 public RowCombiner useMostRecentLong(String columnName) { 43 combinedRow.put(columnName, individualRowsSortedByTimestampDesc.get(0).getAsLong(columnName)); 44 return this; 45 } 46 47 /** Use the most recent value for the specified column. */ useMostRecentString(String columnName)48 public RowCombiner useMostRecentString(String columnName) { 49 combinedRow.put(columnName, individualRowsSortedByTimestampDesc.get(0).getAsString(columnName)); 50 return this; 51 } 52 useMostRecentBlob(String columnName)53 public RowCombiner useMostRecentBlob(String columnName) { 54 combinedRow.put( 55 columnName, individualRowsSortedByTimestampDesc.get(0).getAsByteArray(columnName)); 56 return this; 57 } 58 59 /** Asserts that all column values for the given column name are the same, and uses it. */ useSingleValueString(String columnName)60 public RowCombiner useSingleValueString(String columnName) { 61 Iterator<ContentValues> iterator = individualRowsSortedByTimestampDesc.iterator(); 62 String singleValue = iterator.next().getAsString(columnName); 63 while (iterator.hasNext()) { 64 String current = iterator.next().getAsString(columnName); 65 Assert.checkState(Objects.equals(singleValue, current), "Values different for " + columnName); 66 } 67 combinedRow.put(columnName, singleValue); 68 return this; 69 } 70 71 /** Asserts that all column values for the given column name are the same, and uses it. */ useSingleValueLong(String columnName)72 public RowCombiner useSingleValueLong(String columnName) { 73 Iterator<ContentValues> iterator = individualRowsSortedByTimestampDesc.iterator(); 74 Long singleValue = iterator.next().getAsLong(columnName); 75 while (iterator.hasNext()) { 76 Long current = iterator.next().getAsLong(columnName); 77 Assert.checkState(Objects.equals(singleValue, current), "Values different for " + columnName); 78 } 79 combinedRow.put(columnName, singleValue); 80 return this; 81 } 82 83 /** Asserts that all column values for the given column name are the same, and uses it. */ useSingleValueInt(String columnName)84 public RowCombiner useSingleValueInt(String columnName) { 85 Iterator<ContentValues> iterator = individualRowsSortedByTimestampDesc.iterator(); 86 Integer singleValue = iterator.next().getAsInteger(columnName); 87 while (iterator.hasNext()) { 88 Integer current = iterator.next().getAsInteger(columnName); 89 Assert.checkState(Objects.equals(singleValue, current), "Values different for " + columnName); 90 } 91 combinedRow.put(columnName, singleValue); 92 return this; 93 } 94 95 /** Performs a bitwise OR on the specified column and yields the result. */ bitwiseOr(String columnName)96 public RowCombiner bitwiseOr(String columnName) { 97 int combinedValue = 0; 98 for (ContentValues val : individualRowsSortedByTimestampDesc) { 99 combinedValue |= val.getAsInteger(columnName); 100 } 101 combinedRow.put(columnName, combinedValue); 102 return this; 103 } 104 combine()105 public ContentValues combine() { 106 return combinedRow; 107 } 108 } 109