| /* |
| * 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.flink.api.common.typeutils; |
| |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.core.memory.DataInputView; |
| import org.apache.flink.core.memory.DataOutputView; |
| import org.apache.flink.util.Preconditions; |
| |
| import java.io.IOException; |
| |
| /** |
| * Configuration snapshot for serializers for generic types. |
| * |
| * @param <T> The type to be instantiated. |
| */ |
| @Internal |
| public abstract class GenericTypeSerializerConfigSnapshot<T> extends TypeSerializerConfigSnapshot { |
| |
| private Class<T> typeClass; |
| |
| /** This empty nullary constructor is required for deserializing the configuration. */ |
| public GenericTypeSerializerConfigSnapshot() {} |
| |
| public GenericTypeSerializerConfigSnapshot(Class<T> typeClass) { |
| this.typeClass = Preconditions.checkNotNull(typeClass); |
| } |
| |
| @Override |
| public void write(DataOutputView out) throws IOException { |
| super.write(out); |
| |
| // write only the classname to avoid Java serialization |
| out.writeUTF(typeClass.getName()); |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void read(DataInputView in) throws IOException { |
| super.read(in); |
| |
| String genericTypeClassname = in.readUTF(); |
| try { |
| typeClass = (Class<T>) Class.forName(genericTypeClassname, true, getUserCodeClassLoader()); |
| } catch (ClassNotFoundException e) { |
| throw new IOException("Could not find the requested class " + genericTypeClassname + " in classpath.", e); |
| } |
| } |
| |
| public Class<T> getTypeClass() { |
| return typeClass; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } |
| |
| if (obj == null) { |
| return false; |
| } |
| |
| return (obj.getClass().equals(getClass())) |
| && typeClass.equals(((GenericTypeSerializerConfigSnapshot) obj).getTypeClass()); |
| } |
| |
| @Override |
| public int hashCode() { |
| return typeClass.hashCode(); |
| } |
| } |