/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.hive.ql.exec.persistence;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
public abstract class AbstractMapJoinTableContainer implements MapJoinPersistableTableContainer {
private final Map<String, String> metaData;
protected static final String THESHOLD_NAME = "threshold";
protected static final String LOAD_NAME = "load";
/** Creates metadata for implementation classes' ctors from threshold and load factor. */
protected static Map<String, String> createConstructorMetaData(int threshold, float loadFactor) {
Map<String, String> metaData = new HashMap<String, String>();
metaData.put(THESHOLD_NAME, String.valueOf(threshold));
metaData.put(LOAD_NAME, String.valueOf(loadFactor));
return metaData;
}
protected AbstractMapJoinTableContainer(Map<String, String> metaData) {
this.metaData = metaData;
}
@Override
public Map<String, String> getMetaData() {
return Collections.unmodifiableMap(metaData);
}
protected void putMetaData(String key, String value) {
metaData.put(key, value);
}
}