| /* |
| * 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.base; |
| |
| import java.io.IOException; |
| |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.api.common.typeutils.SimpleTypeSerializerSnapshot; |
| import org.apache.flink.api.common.typeutils.TypeSerializerSnapshot; |
| import org.apache.flink.core.memory.DataInputView; |
| import org.apache.flink.core.memory.DataOutputView; |
| import org.apache.flink.types.StringValue; |
| |
| @Internal |
| public final class StringValueSerializer extends TypeSerializerSingleton<StringValue> { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private static final int HIGH_BIT = 0x1 << 7; |
| |
| public static final StringValueSerializer INSTANCE = new StringValueSerializer(); |
| |
| @Override |
| public boolean isImmutableType() { |
| return false; |
| } |
| |
| @Override |
| public StringValue createInstance() { |
| return new StringValue(); |
| } |
| |
| @Override |
| public StringValue copy(StringValue from) { |
| return copy(from, new StringValue()); |
| } |
| |
| @Override |
| public StringValue copy(StringValue from, StringValue reuse) { |
| reuse.setValue(from); |
| return reuse; |
| } |
| |
| @Override |
| public int getLength() { |
| return -1; |
| } |
| |
| @Override |
| public void serialize(StringValue record, DataOutputView target) throws IOException { |
| record.write(target); |
| } |
| |
| @Override |
| public StringValue deserialize(DataInputView source) throws IOException { |
| return deserialize(new StringValue(), source); |
| } |
| |
| @Override |
| public StringValue deserialize(StringValue reuse, DataInputView source) throws IOException { |
| reuse.read(source); |
| return reuse; |
| } |
| |
| @Override |
| public void copy(DataInputView source, DataOutputView target) throws IOException { |
| int len = source.readUnsignedByte(); |
| target.writeByte(len); |
| |
| if (len >= HIGH_BIT) { |
| int shift = 7; |
| int curr; |
| len = len & 0x7f; |
| while ((curr = source.readUnsignedByte()) >= HIGH_BIT) { |
| target.writeByte(curr); |
| len |= (curr & 0x7f) << shift; |
| shift += 7; |
| } |
| target.writeByte(curr); |
| len |= curr << shift; |
| } |
| |
| for (int i = 0; i < len; i++) { |
| int c = source.readUnsignedByte(); |
| target.writeByte(c); |
| while (c >= HIGH_BIT) { |
| c = source.readUnsignedByte(); |
| target.writeByte(c); |
| } |
| } |
| } |
| |
| @Override |
| public boolean canEqual(Object obj) { |
| return obj instanceof StringValueSerializer; |
| } |
| |
| @Override |
| public TypeSerializerSnapshot<StringValue> snapshotConfiguration() { |
| return new StringValueSerializerSnapshot(); |
| } |
| |
| // ------------------------------------------------------------------------ |
| |
| /** |
| * Serializer configuration snapshot for compatibility and format evolution. |
| */ |
| @SuppressWarnings("WeakerAccess") |
| public static final class StringValueSerializerSnapshot extends SimpleTypeSerializerSnapshot<StringValue> { |
| |
| public StringValueSerializerSnapshot() { |
| super(() -> INSTANCE); |
| } |
| } |
| } |