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/*
* Copyright (C) 2015 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.sched.util.codec;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import javax.annotation.Nonnull;
/**
* A {@link ConvertCodec} allowing to convert list of {@link Entry} into a map.
*/
public class PairListToMapCodecConverter<T, U> extends
ConvertCodec<List<Entry<T, U>>, Map<T, U>> {
public PairListToMapCodecConverter(StringCodec<List<Entry<T, U>>> codec) {
super(codec);
}
@Override
@Nonnull
public Map<T, U> parseString(@Nonnull CodecContext context,
@Nonnull String string) {
List<Entry<T, U>> list = codec.parseString(context, string);
Map<T, U> map = new HashMap<T, U>(Math.round(list.size() / 0.75f),
0.75f);
for (Entry<T, U> entry : list) {
map.put(entry.getKey(), entry.getValue());
}
return map;
}
@Override
@Nonnull
public String formatValue(@Nonnull Map<T, U> data) {
return codec.formatValue(new ArrayList<Map.Entry<T, U>>(data.entrySet()));
}
@Override
public void checkValue(@Nonnull CodecContext context, @Nonnull Map<T, U> data)
throws CheckingException {
codec.checkValue(context, new ArrayList<Map.Entry<T, U>>(data.entrySet()));
}
}
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