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381 lines (326 loc) · 10.1 KB
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package com.jsoniter.output;
import com.jsoniter.spi.JsonException;
import com.jsoniter.any.Any;
import com.jsoniter.spi.Encoder;
import com.jsoniter.spi.TypeLiteral;
import java.io.IOException;
import java.io.OutputStream;
public class JsonStream extends OutputStream {
public static int defaultIndentionStep = 0;
public int indentionStep = defaultIndentionStep;
private int indention = 0;
private OutputStream out;
byte buf[];
int count;
public JsonStream(OutputStream out, int bufSize) {
if (bufSize < 32) {
throw new JsonException("buffer size must be larger than 32: " + bufSize);
}
this.out = out;
this.buf = new byte[bufSize];
}
public void reset(OutputStream out) {
this.out = out;
this.count = 0;
}
public final void write(int b) throws IOException {
if (count == buf.length) {
flushBuffer();
}
buf[count++] = (byte) b;
}
public final void write(byte b1, byte b2) throws IOException {
if (count >= buf.length - 1) {
flushBuffer();
}
buf[count++] = b1;
buf[count++] = b2;
}
public final void write(byte b1, byte b2, byte b3) throws IOException {
if (count >= buf.length - 2) {
flushBuffer();
}
buf[count++] = b1;
buf[count++] = b2;
buf[count++] = b3;
}
public final void write(byte b1, byte b2, byte b3, byte b4) throws IOException {
if (count >= buf.length - 3) {
flushBuffer();
}
buf[count++] = b1;
buf[count++] = b2;
buf[count++] = b3;
buf[count++] = b4;
}
public final void write(byte b1, byte b2, byte b3, byte b4, byte b5) throws IOException {
if (count >= buf.length - 4) {
flushBuffer();
}
buf[count++] = b1;
buf[count++] = b2;
buf[count++] = b3;
buf[count++] = b4;
buf[count++] = b5;
}
public final void write(byte b1, byte b2, byte b3, byte b4, byte b5, byte b6) throws IOException {
if (count >= buf.length - 5) {
flushBuffer();
}
buf[count++] = b1;
buf[count++] = b2;
buf[count++] = b3;
buf[count++] = b4;
buf[count++] = b5;
buf[count++] = b6;
}
public final void write(byte b[], int off, int len) throws IOException {
if (len >= buf.length - count) {
if (len >= buf.length) {
/* If the request length exceeds the size of the output buffer,
flush the output buffer and then write the data directly.
In this way buffered streams will cascade harmlessly. */
flushBuffer();
out.write(b, off, len);
return;
}
flushBuffer();
}
System.arraycopy(b, off, buf, count, len);
count += len;
}
public void flush() throws IOException {
flushBuffer();
out.flush();
}
@Override
public void close() throws IOException {
if (count > 0) {
flushBuffer();
}
out.close();
this.out = null;
count = 0;
}
final void flushBuffer() throws IOException {
out.write(buf, 0, count);
count = 0;
}
public final void writeVal(String val) throws IOException {
if (val == null) {
writeNull();
} else {
StreamImplString.writeString(this, val);
}
}
public final void writeRaw(String val) throws IOException {
writeRaw(val, val.length());
}
public final void writeRaw(String val, int remaining) throws IOException {
int i = 0;
for (; ; ) {
int available = buf.length - count;
if (available < remaining) {
remaining -= available;
int j = i + available;
val.getBytes(i, j, buf, count);
count = buf.length;
flushBuffer();
i = j;
} else {
int j = i + remaining;
val.getBytes(i, j, buf, count);
count += remaining;
return;
}
}
}
public final void writeVal(Boolean val) throws IOException {
if (val == null) {
writeNull();
} else {
if (val) {
writeTrue();
} else {
writeFalse();
}
}
}
public final void writeVal(boolean val) throws IOException {
if (val) {
writeTrue();
} else {
writeFalse();
}
}
public final void writeTrue() throws IOException {
write((byte) 't', (byte) 'r', (byte) 'u', (byte) 'e');
}
public final void writeFalse() throws IOException {
write((byte) 'f', (byte) 'a', (byte) 'l', (byte) 's', (byte) 'e');
}
public final void writeVal(Short val) throws IOException {
if (val == null) {
writeNull();
} else {
writeVal(val.intValue());
}
}
public final void writeVal(short val) throws IOException {
writeVal((int) val);
}
public final void writeVal(Integer val) throws IOException {
if (val == null) {
writeNull();
} else {
writeVal(val.intValue());
}
}
public final void writeVal(int val) throws IOException {
StreamImplNumber.writeInt(this, val);
}
public final void writeVal(Long val) throws IOException {
if (val == null) {
writeNull();
} else {
writeVal(val.longValue());
}
}
public final void writeVal(long val) throws IOException {
StreamImplNumber.writeLong(this, val);
}
public final void writeVal(Float val) throws IOException {
if (val == null) {
writeNull();
} else {
writeVal(val.floatValue());
}
}
public final void writeVal(float val) throws IOException {
StreamImplNumber.writeFloat(this, val);
}
public final void writeVal(Double val) throws IOException {
if (val == null) {
writeNull();
} else {
writeVal(val.doubleValue());
}
}
public final void writeVal(double val) throws IOException {
StreamImplNumber.writeDouble(this, val);
}
public final void writeVal(Any val) throws IOException {
val.writeTo(this);
}
public final void writeNull() throws IOException {
write((byte) 'n', (byte) 'u', (byte) 'l', (byte) 'l');
}
public final void writeEmptyObject() throws IOException {
write((byte) '{', (byte) '}');
}
public final void writeEmptyArray() throws IOException {
write((byte) '[', (byte) ']');
}
public final void writeArrayStart() throws IOException {
indention += indentionStep;
write('[');
writeIndention();
}
public final void writeMore() throws IOException {
write(',');
writeIndention();
}
private void writeIndention() throws IOException {
writeIndention(0);
}
private void writeIndention(int delta) throws IOException {
if (indention == 0) {
return;
}
write('\n');
int toWrite = indention - delta;
int i = 0;
for (; ; ) {
for (; i < toWrite && count < buf.length; i++) {
buf[count++] = ' ';
}
if (i == toWrite) {
break;
} else {
flushBuffer();
}
}
}
public final void writeArrayEnd() throws IOException {
writeIndention(indentionStep);
indention -= indentionStep;
write(']');
}
public final void writeObjectStart() throws IOException {
indention += indentionStep;
write('{');
writeIndention();
}
public final void writeObjectField(String field) throws IOException {
writeVal(field);
write(':');
}
public final void writeObjectEnd() throws IOException {
writeIndention(indentionStep);
indention -= indentionStep;
write('}');
}
public final void writeVal(Object obj) throws IOException {
if (obj == null) {
writeNull();
return;
}
Class<?> clazz = obj.getClass();
String cacheKey = TypeLiteral.create(clazz).getEncoderCacheKey();
Codegen.getEncoder(cacheKey, clazz).encode(obj, this);
}
public final <T> void writeVal(TypeLiteral<T> typeLiteral, T obj) throws IOException {
if (null == obj) {
writeNull();
} else {
Codegen.getEncoder(typeLiteral.getEncoderCacheKey(), typeLiteral.getType()).encode(obj, this);
}
}
private final static ThreadLocal<JsonStream> tlsStream = new ThreadLocal<JsonStream>() {
@Override
protected JsonStream initialValue() {
return new JsonStream(null, 4096);
}
};
public static void serialize(Object obj, OutputStream out) {
JsonStream stream = tlsStream.get();
try {
try {
stream.reset(out);
stream.writeVal(obj);
} finally {
stream.close();
}
} catch (IOException e) {
throw new JsonException(e);
}
}
private final static ThreadLocal<AsciiOutputStream> tlsAsciiOutputStream = new ThreadLocal<AsciiOutputStream>() {
@Override
protected AsciiOutputStream initialValue() {
return new AsciiOutputStream();
}
};
public static String serialize(Object obj) {
AsciiOutputStream asciiOutputStream = tlsAsciiOutputStream.get();
asciiOutputStream.reset();
serialize(obj, asciiOutputStream);
return asciiOutputStream.toString();
}
public static void setMode(EncodingMode mode) {
Codegen.setMode(mode);
}
public static void registerNativeEncoder(Class clazz, Encoder encoder) {
CodegenImplNative.NATIVE_ENCODERS.put(clazz, encoder);
}
}
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