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cn.wjybxx.dson.DsonLiteBinaryWriter Maven / Gradle / Ivy
/*
* Copyright 2023-2024 wjybxx([email protected] )
*
* 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 cn.wjybxx.dson;
import cn.wjybxx.base.io.ConcurrentObjectPool;
import cn.wjybxx.dson.internal.DsonInternals;
import cn.wjybxx.dson.io.DsonChunk;
import cn.wjybxx.dson.io.DsonIOException;
import cn.wjybxx.dson.io.DsonOutput;
import cn.wjybxx.dson.types.*;
import java.util.Objects;
/**
* @author wjybxx
* date - 2023/4/21
*/
public class DsonLiteBinaryWriter extends AbstractDsonLiteWriter {
private DsonOutput output;
private final boolean autoClose;
public DsonLiteBinaryWriter(DsonWriterSettings settings, DsonOutput output) {
this(settings, output, settings.autoClose);
}
public DsonLiteBinaryWriter(DsonWriterSettings settings, DsonOutput output, boolean autoClose) {
super(settings);
this.output = Objects.requireNonNull(output);
this.autoClose = autoClose;
Context context = newContext(null, DsonContextType.TOP_LEVEL, null);
setContext(context);
}
@Override
protected Context getContext() {
return (Context) super.getContext();
}
@Override
public void flush() {
if (output != null) {
output.flush();
}
}
@Override
public void close() {
Context context = getContext();
setContext(null);
while (context != null) {
Context parent = context.getParent();
contextPool.release(context);
context = parent;
}
if (output != null) {
output.flush();
if (autoClose) {
output.close();
}
output = null;
}
super.close();
}
// region state
private void writeFullTypeAndCurrentName(DsonOutput output, DsonType dsonType, int wireType) {
output.writeRawByte((byte) Dsons.makeFullType(dsonType.getNumber(), wireType));
if (dsonType == DsonType.HEADER) { // header是匿名属性
return;
}
Context context = getContext();
if (context.contextType == DsonContextType.OBJECT
|| context.contextType == DsonContextType.HEADER) {
output.writeUint32(context.curName);
}
}
// endregion
// region 简单值
@Override
protected void doWriteInt32(int value, WireType wireType) {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.INT32, wireType.getNumber());
wireType.writeInt32(output, value);
}
@Override
protected void doWriteInt64(long value, WireType wireType) {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.INT64, wireType.getNumber());
wireType.writeInt64(output, value);
}
@Override
protected void doWriteFloat(float value) {
int wireType = DsonReaderUtils.wireTypeOfFloat(value);
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.FLOAT, wireType);
DsonReaderUtils.writeFloat(output, value, wireType);
}
@Override
protected void doWriteDouble(double value) {
int wireType = DsonReaderUtils.wireTypeOfDouble(value);
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.DOUBLE, wireType);
DsonReaderUtils.writeDouble(output, value, wireType);
}
@Override
protected void doWriteBool(boolean value) {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.BOOL, value ? 1 : 0); // 内联到wireType
}
@Override
protected void doWriteString(String value) {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.STRING, 0);
output.writeString(value);
}
@Override
protected void doWriteNull() {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.NULL, 0);
}
@Override
protected void doWriteBinary(Binary binary) {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.BINARY, 0);
DsonReaderUtils.writeBinary(output, binary);
}
@Override
protected void doWriteBinary(DsonChunk chunk) {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.BINARY, 0);
DsonReaderUtils.writeBinary(output, chunk);
}
@Override
protected void doWritePtr(ObjectPtr objectPtr) {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.POINTER, DsonReaderUtils.wireTypeOfPtr(objectPtr));
DsonReaderUtils.writePtr(output, objectPtr);
}
@Override
protected void doWriteLitePtr(ObjectLitePtr objectLitePtr) {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.LITE_POINTER, DsonReaderUtils.wireTypeOfLitePtr(objectLitePtr));
DsonReaderUtils.writeLitePtr(output, objectLitePtr);
}
@Override
protected void doWriteDateTime(ExtDateTime dateTime) {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.DATETIME, dateTime.getEnables());
DsonReaderUtils.writeDateTime(output, dateTime);
}
@Override
protected void doWriteTimestamp(Timestamp timestamp) {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, DsonType.TIMESTAMP, 0);
DsonReaderUtils.writeTimestamp(output, timestamp);
}
// endregion
// region 容器
@Override
protected void doWriteStartContainer(DsonContextType contextType, DsonType dsonType) {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, dsonType, 0);
Context newContext = newContext(getContext(), contextType, dsonType);
newContext.preWritten = output.getPosition();
if (contextType == DsonContextType.HEADER) {
output.writeFixed16(0);
} else {
output.writeFixed32(0);
}
setContext(newContext);
this.recursionDepth++;
}
@Override
protected void doWriteEndContainer() {
// 记录preWritten在写length之前，最后的size要减4
Context context = getContext();
int preWritten = context.preWritten;
int len;
if (context.contextType == DsonContextType.HEADER) {
len = output.getPosition() - preWritten - 2;
if (len >= 65535) throw new DsonIOException("header is too large");
output.setFixedInt16(preWritten, len);
} else {
len = output.getPosition() - preWritten - 4;
output.setFixedInt32(preWritten, len);
}
this.recursionDepth--;
setContext(context.parent);
returnContext(context);
}
// endregion
// region 特殊接口
@Override
protected void doWriteValueBytes(DsonType type, byte[] data) {
DsonOutput output = this.output;
writeFullTypeAndCurrentName(output, type, 0);
DsonReaderUtils.writeValueBytes(output, type, data);
}
// endregion
// region context
private static final ConcurrentObjectPool contextPool = new ConcurrentObjectPool<>(Context::new, Context::reset,
DsonInternals.CONTEXT_POOL_SIZE);
private static Context newContext(Context parent, DsonContextType contextType, DsonType dsonType) {
Context context = contextPool.acquire();
context.init(parent, contextType, dsonType);
return context;
}
private static void returnContext(Context context) {
contextPool.release(context);
}
protected static class Context extends AbstractDsonLiteWriter.Context {
int preWritten = 0;
public Context() {
}
@Override
public Context getParent() {
return (Context) parent;
}
@Override
public void reset() {
super.reset();
preWritten = 0;
}
}
// endregion
}
