com.hazelcast.sql.impl.type.converter.MapConverter Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.sql.impl.type.converter;
import com.hazelcast.sql.impl.type.QueryDataTypeFamily;
import java.util.Map;
/**
* Converter for {@link java.util.Map} type.
*/
public class MapConverter extends Converter {
public static final MapConverter INSTANCE = new MapConverter();
public MapConverter() {
super(ID_MAP, QueryDataTypeFamily.MAP);
}
@Override
public Class getValueClass() {
return Map.class;
}
@Override
public Object convertToSelf(Converter converter, Object val) {
Object value = converter.asObject(val);
if (value == null) {
return null;
}
if (value instanceof Map) {
return value;
}
throw converter.cannotConvertError(converter.getTypeFamily());
}
}