com.qwazr.database.store.keys.PrimaryIdsKey Maven / Gradle / Ivy
/**
* Copyright 2015-2016 Emmanuel Keller / QWAZR
*
* 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.qwazr.database.store.keys;
import com.qwazr.database.store.ByteConverter;
import com.qwazr.database.store.KeyStore;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Collection;
import java.util.Set;
public class PrimaryIdsKey extends KeyAbstract {
private final String key;
public PrimaryIdsKey(String key) {
super(KeyEnum.PRIMARY_IDS, ByteConverter.IntegerByteConverter.INSTANCE);
this.key = key;
}
@Override
public void buildKey(final DataOutputStream output) throws IOException {
super.buildKey(output);
output.writeChars(key);
}
/**
* Resolve the keys by collecting the internal docId(s)
*
* @param store the store to request
* @param keys a list of key to resolve
* @param ids the collection
* @throws IOException if any I/O error occurs
*/
final static public void fillExistingIds(final KeyStore store, final Set keys,
final Collection ids) throws IOException {
if (keys == null || keys.isEmpty())
return;
for (String key : keys) {
Integer id = new PrimaryIdsKey(key).getValue(store);
if (id != null)
ids.add(id);
}
}
}