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java/src/main/java/com/jsoniter/CodegenImplNative.java at master · structure/java · GitHub

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package com.jsoniter;

import com.jsoniter.any.Any;

import com.jsoniter.spi.*;

import java.io.IOException;

import java.lang.reflect.ParameterizedType;

import java.lang.reflect.Type;

import java.lang.reflect.WildcardType;

import java.math.BigDecimal;

import java.math.BigInteger;

import java.util.HashMap;

import java.util.Map;

class CodegenImplNative {

final static Map<String, String> NATIVE_READS = new HashMap<String, String>() {{

put("float", "iter.readFloat()");

put("double", "iter.readDouble()");

put("boolean", "iter.readBoolean()");

put("byte", "iter.readShort()");

put("short", "iter.readShort()");

put("int", "iter.readInt()");

put("char", "iter.readInt()");

put("long", "iter.readLong()");

put(Float.class.getName(), "(iter.readNull() ? null : java.lang.Float.valueOf(iter.readFloat()))");

put(Double.class.getName(), "(iter.readNull() ? null : java.lang.Double.valueOf(iter.readDouble()))");

put(Boolean.class.getName(), "(iter.readNull() ? null : java.lang.Boolean.valueOf(iter.readBoolean()))");

put(Byte.class.getName(), "(iter.readNull() ? null : java.lang.Byte.valueOf((byte)iter.readShort()))");

put(Character.class.getName(), "(iter.readNull() ? null : java.lang.Character.valueOf((char)iter.readShort()))");

put(Short.class.getName(), "(iter.readNull() ? null : java.lang.Short.valueOf(iter.readShort()))");

put(Integer.class.getName(), "(iter.readNull() ? null : java.lang.Integer.valueOf(iter.readInt()))");

put(Long.class.getName(), "(iter.readNull() ? null : java.lang.Long.valueOf(iter.readLong()))");

put(BigDecimal.class.getName(), "iter.readBigDecimal()");

put(BigInteger.class.getName(), "iter.readBigInteger()");

put(String.class.getName(), "iter.readString()");

put(Object.class.getName(), "iter.read()");

put(Any.class.getName(), "iter.readAny()");

}};

final static Map<Class, Decoder> NATIVE_DECODERS = new HashMap<Class, Decoder>() {{

put(float.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readFloat();

}

});

put(Float.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readNull() ? null : iter.readFloat();

}

});

put(double.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readDouble();

}

});

put(Double.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readNull() ? null : iter.readDouble();

}

});

put(boolean.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readBoolean();

}

});

put(Boolean.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readNull() ? null : iter.readBoolean();

}

});

put(byte.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return Byte.valueOf((byte) iter.readShort());

}

});

put(Byte.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readNull() ? null : (byte)iter.readShort();

}

});

put(short.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readShort();

}

});

put(Short.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readNull() ? null : iter.readShort();

}

});

put(int.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readInt();

}

});

put(Integer.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readNull() ? null : iter.readInt();

}

});

put(char.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return (char)iter.readInt();

}

});

put(Character.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readNull() ? null : (char)iter.readInt();

}

});

put(long.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readLong();

}

});

put(Long.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readNull() ? null : iter.readLong();

}

});

put(BigDecimal.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readBigDecimal();

}

});

put(BigInteger.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readBigInteger();

}

});

put(String.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readString();

}

});

put(Object.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.read();

}

});

put(Any.class, new Decoder() {

@Override

public Object decode(JsonIterator iter) throws IOException {

return iter.readAny();

}

});

}};

public static String genReadOp(Type type) {

String cacheKey = TypeLiteral.create(type).getDecoderCacheKey();

return String.format("(%s)%s", getTypeName(type), genReadOp(cacheKey, type));

}

public static String getTypeName(Type fieldType) {

if (fieldType instanceof Class) {

Class clazz = (Class) fieldType;

return clazz.getCanonicalName();

} else if (fieldType instanceof ParameterizedType) {

ParameterizedType pType = (ParameterizedType) fieldType;

Class clazz = (Class) pType.getRawType();

return clazz.getCanonicalName();

} else if (fieldType instanceof WildcardType) {

return Object.class.getCanonicalName();

} else {

throw new JsonException("unsupported type: " + fieldType);

}

}

static String genField(Binding field) {

String fieldCacheKey = field.decoderCacheKey();

Type fieldType = field.valueType;

return String.format("(%s)%s", getTypeName(fieldType), genReadOp(fieldCacheKey, fieldType));

}

private static String genReadOp(String cacheKey, Type valueType) {

// the field decoder might be registered directly

Decoder decoder = JsoniterSpi.getDecoder(cacheKey);

if (decoder == null) {

// if cache key is for field, and there is no field decoder specified

// update cache key for normal type

cacheKey = TypeLiteral.create(valueType).getDecoderCacheKey();

decoder = JsoniterSpi.getDecoder(cacheKey);

if (decoder == null) {

if (valueType instanceof Class) {

Class clazz = (Class) valueType;

String nativeRead = NATIVE_READS.get(clazz.getCanonicalName());

if (nativeRead != null) {

return nativeRead;

}

} else if (valueType instanceof WildcardType) {

return NATIVE_READS.get(Object.class.getCanonicalName());

}

Codegen.getDecoder(cacheKey, valueType);

if (Codegen.canStaticAccess(cacheKey)) {

return String.format("%s.decode_(iter)", cacheKey);

} else {

// can not use static "decode_" method to access, go through codegen cache

return String.format("com.jsoniter.CodegenAccess.read(\"%s\", iter)", cacheKey);

}

}

}

if (valueType == boolean.class) {

if (!(decoder instanceof Decoder.BooleanDecoder)) {

throw new JsonException("decoder for " + cacheKey + "must implement Decoder.BooleanDecoder");

}

return String.format("com.jsoniter.CodegenAccess.readBoolean(\"%s\", iter)", cacheKey);

}

if (valueType == byte.class) {

if (!(decoder instanceof Decoder.ShortDecoder)) {

throw new JsonException("decoder for " + cacheKey + "must implement Decoder.ShortDecoder");

}

return String.format("com.jsoniter.CodegenAccess.readShort(\"%s\", iter)", cacheKey);

}

if (valueType == short.class) {

if (!(decoder instanceof Decoder.ShortDecoder)) {

throw new JsonException("decoder for " + cacheKey + "must implement Decoder.ShortDecoder");

}

return String.format("com.jsoniter.CodegenAccess.readShort(\"%s\", iter)", cacheKey);

}

if (valueType == char.class) {

if (!(decoder instanceof Decoder.IntDecoder)) {

throw new JsonException("decoder for " + cacheKey + "must implement Decoder.IntDecoder");

}

return String.format("com.jsoniter.CodegenAccess.readInt(\"%s\", iter)", cacheKey);

}

if (valueType == int.class) {

if (!(decoder instanceof Decoder.IntDecoder)) {

throw new JsonException("decoder for " + cacheKey + "must implement Decoder.IntDecoder");

}

return String.format("com.jsoniter.CodegenAccess.readInt(\"%s\", iter)", cacheKey);

}

if (valueType == long.class) {

if (!(decoder instanceof Decoder.LongDecoder)) {

throw new JsonException("decoder for " + cacheKey + "must implement Decoder.LongDecoder");

}

return String.format("com.jsoniter.CodegenAccess.readLong(\"%s\", iter)", cacheKey);

}

if (valueType == float.class) {

if (!(decoder instanceof Decoder.FloatDecoder)) {

throw new JsonException("decoder for " + cacheKey + "must implement Decoder.FloatDecoder");

}

return String.format("com.jsoniter.CodegenAccess.readFloat(\"%s\", iter)", cacheKey);

}

if (valueType == double.class) {

if (!(decoder instanceof Decoder.DoubleDecoder)) {

throw new JsonException("decoder for " + cacheKey + "must implement Decoder.DoubleDecoder");

}

return String.format("com.jsoniter.CodegenAccess.readDouble(\"%s\", iter)", cacheKey);

}

return String.format("com.jsoniter.CodegenAccess.read(\"%s\", iter)", cacheKey);

}

}

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