| /* |
| * 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.cassandra.db.marshal; |
| |
| import java.nio.ByteBuffer; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.List; |
| |
| import org.apache.cassandra.cql3.CQL3Type; |
| import org.apache.cassandra.cql3.Term; |
| import org.apache.cassandra.exceptions.ConfigurationException; |
| import org.apache.cassandra.exceptions.SyntaxException; |
| import org.apache.cassandra.serializers.MarshalException; |
| import org.apache.cassandra.serializers.TypeSerializer; |
| |
| public class ReversedType<T> extends AbstractType<T> |
| { |
| // interning instances |
| private static final Map<AbstractType<?>, ReversedType> instances = new HashMap<AbstractType<?>, ReversedType>(); |
| |
| public final AbstractType<T> baseType; |
| |
| public static <T> ReversedType<T> getInstance(TypeParser parser) throws ConfigurationException, SyntaxException |
| { |
| List<AbstractType<?>> types = parser.getTypeParameters(); |
| if (types.size() != 1) |
| throw new ConfigurationException("ReversedType takes exactly one argument, " + types.size() + " given"); |
| return getInstance((AbstractType<T>) types.get(0)); |
| } |
| |
| public static synchronized <T> ReversedType<T> getInstance(AbstractType<T> baseType) |
| { |
| ReversedType<T> type = instances.get(baseType); |
| if (type == null) |
| { |
| type = new ReversedType<T>(baseType); |
| instances.put(baseType, type); |
| } |
| return type; |
| } |
| |
| private ReversedType(AbstractType<T> baseType) |
| { |
| super(ComparisonType.CUSTOM); |
| this.baseType = baseType; |
| } |
| |
| public boolean isEmptyValueMeaningless() |
| { |
| return baseType.isEmptyValueMeaningless(); |
| } |
| |
| public int compareCustom(ByteBuffer o1, ByteBuffer o2) |
| { |
| return baseType.compare(o2, o1); |
| } |
| |
| @Override |
| public int compareForCQL(ByteBuffer v1, ByteBuffer v2) |
| { |
| return baseType.compare(v1, v2); |
| } |
| |
| public String getString(ByteBuffer bytes) |
| { |
| return baseType.getString(bytes); |
| } |
| |
| public ByteBuffer fromString(String source) |
| { |
| return baseType.fromString(source); |
| } |
| |
| @Override |
| public Term fromJSONObject(Object parsed) throws MarshalException |
| { |
| return baseType.fromJSONObject(parsed); |
| } |
| |
| @Override |
| public String toJSONString(ByteBuffer buffer, int protocolVersion) |
| { |
| return baseType.toJSONString(buffer, protocolVersion); |
| } |
| |
| @Override |
| public boolean isCompatibleWith(AbstractType<?> otherType) |
| { |
| if (!(otherType instanceof ReversedType)) |
| return false; |
| |
| return this.baseType.isCompatibleWith(((ReversedType) otherType).baseType); |
| } |
| |
| @Override |
| public boolean isValueCompatibleWith(AbstractType<?> otherType) |
| { |
| return this.baseType.isValueCompatibleWith(otherType); |
| } |
| |
| @Override |
| public CQL3Type asCQL3Type() |
| { |
| return baseType.asCQL3Type(); |
| } |
| |
| public TypeSerializer<T> getSerializer() |
| { |
| return baseType.getSerializer(); |
| } |
| |
| public boolean referencesUserType(String userTypeName) |
| { |
| return baseType.referencesUserType(userTypeName); |
| } |
| |
| @Override |
| protected int valueLengthIfFixed() |
| { |
| return baseType.valueLengthIfFixed(); |
| } |
| |
| @Override |
| public boolean isReversed() |
| { |
| return true; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return getClass().getName() + "(" + baseType + ")"; |
| } |
| } |