diff options
Diffstat (limited to 'java/com/android/dialer/calllog/datasources/util')
-rw-r--r-- | java/com/android/dialer/calllog/datasources/util/RowCombiner.java | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/java/com/android/dialer/calllog/datasources/util/RowCombiner.java b/java/com/android/dialer/calllog/datasources/util/RowCombiner.java new file mode 100644 index 000000000..adb7a0742 --- /dev/null +++ b/java/com/android/dialer/calllog/datasources/util/RowCombiner.java @@ -0,0 +1,73 @@ +/* + * Copyright (C) 2017 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License + */ +package com.android.dialer.calllog.datasources.util; + +import android.content.ContentValues; +import com.android.dialer.common.Assert; +import java.util.Iterator; +import java.util.List; +import java.util.Objects; + +/** Convenience class for aggregating row values. */ +public class RowCombiner { + private final List<ContentValues> individualRowsSortedByTimestampDesc; + private final ContentValues combinedRow = new ContentValues(); + + public RowCombiner(List<ContentValues> individualRowsSortedByTimestampDesc) { + Assert.checkArgument(!individualRowsSortedByTimestampDesc.isEmpty()); + this.individualRowsSortedByTimestampDesc = individualRowsSortedByTimestampDesc; + } + + /** Use the most recent value for the specified column. */ + public RowCombiner useMostRecentLong(String columnName) { + combinedRow.put(columnName, individualRowsSortedByTimestampDesc.get(0).getAsLong(columnName)); + return this; + } + + /** Use the most recent value for the specified column. */ + public RowCombiner useMostRecentString(String columnName) { + combinedRow.put(columnName, individualRowsSortedByTimestampDesc.get(0).getAsString(columnName)); + return this; + } + + /** Asserts that all column values for the given column name are the same, and uses it. */ + public RowCombiner useSingleValueString(String columnName) { + Iterator<ContentValues> iterator = individualRowsSortedByTimestampDesc.iterator(); + String singleValue = iterator.next().getAsString(columnName); + while (iterator.hasNext()) { + String current = iterator.next().getAsString(columnName); + Assert.checkState(Objects.equals(singleValue, current), "Values different for " + columnName); + } + combinedRow.put(columnName, singleValue); + return this; + } + + /** Asserts that all column values for the given column name are the same, and uses it. */ + public RowCombiner useSingleValueLong(String columnName) { + Iterator<ContentValues> iterator = individualRowsSortedByTimestampDesc.iterator(); + Long singleValue = iterator.next().getAsLong(columnName); + while (iterator.hasNext()) { + Long current = iterator.next().getAsLong(columnName); + Assert.checkState(Objects.equals(singleValue, current), "Values different for " + columnName); + } + combinedRow.put(columnName, singleValue); + return this; + } + + public ContentValues combine() { + return combinedRow; + } +} |