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/*
* 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;
}
public RowCombiner useMostRecentBlob(String columnName) {
combinedRow.put(
columnName, individualRowsSortedByTimestampDesc.get(0).getAsByteArray(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;
}
}
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