| /** |
| * 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.atlas.repository.graphdb.titan1.serializer; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import com.thinkaurelius.titan.core.attribute.AttributeSerializer; |
| import com.thinkaurelius.titan.diskstorage.ScanBuffer; |
| import com.thinkaurelius.titan.diskstorage.WriteBuffer; |
| import com.thinkaurelius.titan.graphdb.database.idhandling.VariableLong; |
| import com.thinkaurelius.titan.graphdb.database.serialize.attribute.StringSerializer; |
| /** |
| * Serializer for String lists. |
| */ |
| public class StringListSerializer implements AttributeSerializer<List<String>> { |
| |
| private final StringSerializer stringSerializer = new StringSerializer(); |
| |
| @Override |
| public List<String> read(ScanBuffer buffer) { |
| int length = (int)VariableLong.readPositive(buffer); |
| List<String> result = new ArrayList<String>(length); |
| for(int i = 0; i < length; i++) { |
| result.add(stringSerializer.read(buffer)); |
| } |
| return result; |
| } |
| |
| @Override |
| public void write(WriteBuffer buffer, List<String> attributes) { |
| VariableLong.writePositive(buffer, attributes.size()); |
| for(String attr : attributes) { |
| stringSerializer.write(buffer, attr); |
| } |
| } |
| |
| } |