Java tutorial
/* * Copyright 2011 Edmunds.com, Inc. * * 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.edmunds.etm.common.impl; import org.apache.commons.lang.Validate; import org.apache.thrift.TBase; import org.apache.thrift.TDeserializer; import org.apache.thrift.TException; import org.apache.thrift.TSerializer; import org.apache.thrift.protocol.TBinaryProtocol; import org.springframework.stereotype.Component; import java.io.IOException; /** * Provides serialization and deserialization of Thrift objects. * * @author Ryan Holmes */ @Component public class ObjectSerializer { TSerializer serializer = new TSerializer(new TBinaryProtocol.Factory()); private TDeserializer deserializer = new TDeserializer(new TBinaryProtocol.Factory()); /** * Reads a value object from a byte array. * * @param src the byte array to read * @param valueType the value object's Java class * @param <T> value type * @return deserialized object * @throws java.io.IOException if deserialization failed */ public <T extends TBase> T readValue(byte[] src, Class<T> valueType) throws IOException { Validate.notNull(src, "Source byte array is null"); Validate.notNull(valueType, "Value type is null"); T value; try { value = valueType.newInstance(); } catch (Exception e) { String message = String.format("Unable to instantiate object of type %s", valueType.toString()); throw new IllegalArgumentException(message, e); } try { deserializer.deserialize(value, src); } catch (TException e) { throw new IOException(e); } return value; } /** * Writes a value object to a byte array. * * @param value the value object to write * @return serialized byte array * @throws java.io.IOException if serialization fails */ public byte[] writeValue(TBase value) throws IOException { Validate.notNull(value, "Value object is null"); byte[] bytes; try { bytes = serializer.serialize(value); } catch (TException e) { throw new IOException(e); } return bytes; } }