/*
* 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.core.memory.DataInputView;
import org.apache.flink.core.memory.DataOutputView;
import org.apache.flink.types.StringValue;
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 boolean isStateful() {
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);
}
}
}
}