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package com.jsoniter;

import com.jsoniter.any.Any;

import com.jsoniter.spi.JsonException;

import com.jsoniter.spi.TypeLiteral;

import java.lang.reflect.ParameterizedType;

import java.lang.reflect.Type;

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(), "java.lang.Float.valueOf(iter.readFloat())");

put(Double.class.getName(), "java.lang.Double.valueOf(iter.readDouble())");

put(Boolean.class.getName(), "java.lang.Boolean.valueOf(iter.readBoolean())");

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

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

put(Short.class.getName(), "java.lang.Short.valueOf(iter.readShort())");

put(Integer.class.getName(), "java.lang.Integer.valueOf(iter.readInt())");

put(Long.class.getName(), "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()");

}};

public static String genNative(String nativeReadKey) {

if ("boolean".equals(nativeReadKey)) {

nativeReadKey = Boolean.class.getName();

} else if ("byte".equals(nativeReadKey)) {

nativeReadKey = Byte.class.getName();

} else if ("char".equals(nativeReadKey)) {

nativeReadKey = Character.class.getName();

} else if ("short".equals(nativeReadKey)) {

nativeReadKey = Short.class.getName();

} else if ("int".equals(nativeReadKey)) {

nativeReadKey = Integer.class.getName();

} else if ("long".equals(nativeReadKey)) {

nativeReadKey = Long.class.getName();

} else if ("float".equals(nativeReadKey)) {

nativeReadKey = Float.class.getName();

} else if ("double".equals(nativeReadKey)) {

nativeReadKey = Double.class.getName();

}

String op = NATIVE_READS.get(nativeReadKey);

if (op == null) {

throw new JsonException("do not know how to read: " + nativeReadKey);

}

return "return " + op + ";";

}

public static String genReadOp(Type type) {

if (type instanceof Class) {

Class clazz = (Class) type;

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

if (nativeRead != null) {

return nativeRead;

}

}

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

Codegen.getDecoder(cacheKey, type);// set the decoder to cache

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);

}

}

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 {

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

}

}

}