java/src/main/java/com/jsoniter/CodegenAccess.java at master · SoftwareKing/java · GitHub

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package com.jsoniter;

import com.jsoniter.spi.Decoder;

import com.jsoniter.spi.ExtensionManager;

import com.jsoniter.spi.TypeLiteral;

import java.io.IOException;

import java.util.Collection;

// only uesd by generated code to access decoder

public class CodegenAccess {

public static <T extends Collection> T reuseCollection(T col) {

col.clear();

return col;

}

public static Object existingObject(JsonIterator iter) {

return iter.existingObject;

}

public static Object resetExistingObject(JsonIterator iter) {

Object obj = iter.existingObject;

iter.existingObject = null;

return obj;

}

public static void setExistingObject(JsonIterator iter, Object obj) {

iter.existingObject = obj;

}

public static byte nextToken(JsonIterator iter) throws IOException {

return iter.nextToken();

}

public static final <T> T read(JsonIterator iter, TypeLiteral<T> typeLiteral) throws IOException {

TypeLiteral.NativeType nativeType = typeLiteral.getNativeType();

if (nativeType != null) {

switch (nativeType) {

case FLOAT:

return (T) Float.valueOf(iter.readFloat());

case DOUBLE:

return (T) Double.valueOf(iter.readDouble());

case BOOLEAN:

return (T) Boolean.valueOf(iter.readBoolean());

case BYTE:

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

case SHORT:

return (T) Short.valueOf(iter.readShort());

case INT:

return (T) Integer.valueOf(iter.readInt());

case CHAR:

return (T) Character.valueOf((char) iter.readInt());

case LONG:

return (T) Long.valueOf(iter.readLong());

case BIG_DECIMAL:

return (T) iter.readBigDecimal();

case BIG_INTEGER:

return (T) iter.readBigInteger();

case STRING:

return (T) iter.readString();

case OBJECT:

return (T) iter.readAnyObject();

case ANY:

return (T) iter.readAny();

default:

throw new JsonException("unsupported native type: " + nativeType);

}

} else {

String cacheKey = typeLiteral.getDecoderCacheKey();

return (T) Codegen.getDecoder(cacheKey, typeLiteral.getType()).decode(iter);

}

public static final boolean readBoolean(String cacheKey, JsonIterator iter) throws IOException {

return ((Decoder.BooleanDecoder) ExtensionManager.getDecoder(cacheKey)).decodeBoolean(iter);

}

public static final short readShort(String cacheKey, JsonIterator iter) throws IOException {

return ((Decoder.ShortDecoder) ExtensionManager.getDecoder(cacheKey)).decodeShort(iter);

}

public static final int readInt(String cacheKey, JsonIterator iter) throws IOException {

return ((Decoder.IntDecoder) ExtensionManager.getDecoder(cacheKey)).decodeInt(iter);

}

public static final long readLong(String cacheKey, JsonIterator iter) throws IOException {

return ((Decoder.LongDecoder) ExtensionManager.getDecoder(cacheKey)).decodeLong(iter);

}

public static final float readFloat(String cacheKey, JsonIterator iter) throws IOException {

return ((Decoder.FloatDecoder) ExtensionManager.getDecoder(cacheKey)).decodeFloat(iter);

}

public static final double readDouble(String cacheKey, JsonIterator iter) throws IOException {

return ((Decoder.DoubleDecoder) ExtensionManager.getDecoder(cacheKey)).decodeDouble(iter);

}

public static final <T> T read(String cacheKey, JsonIterator iter) throws IOException {

return (T) Codegen.getDecoder(cacheKey, null).decode(iter);

}

public static boolean readArrayStart(JsonIterator iter) throws IOException {

byte c = iter.nextToken();

if (c != '[') {

throw iter.reportError("readArrayStart", "expect [ or n");

}

c = iter.nextToken();

if (c == ']') {

return false;

}

iter.unreadByte();

return true;

}

public static boolean readObjectStart(JsonIterator iter) throws IOException {

byte c = iter.nextToken();

if (c != '{') {

throw iter.reportError("readObjectStart", "expect { or n, found: " + (char) c);

}

c = iter.nextToken();

if (c == '}') {

return false;

}

iter.unreadByte();

return true;

}

public static void reportIncompleteObject(JsonIterator iter) {

throw iter.reportError("genObject", "expect }");

}

public static void reportIncompleteArray(JsonIterator iter) {

throw iter.reportError("genArray", "expect ]");

}

public static final int readObjectFieldAsHash(JsonIterator iter) throws IOException {

if (iter.nextToken() != '"') {

throw iter.reportError("readObjectFieldAsHash", "expect \"");

}

long hash = 0x811c9dc5;

for (; ; ) {

byte c = 0;

int i = iter.head;

for (; i < iter.tail; i++) {

c = iter.buf[i];

if (c == '"') {

break;

}

hash ^= c;

hash *= 0x1000193;

}

if (c == '"') {

iter.head = i + 1;

if (iter.nextToken() != ':') {

throw iter.reportError("readObjectFieldAsHash", "expect :");

}

return (int) hash;

}

if (!iter.loadMore()) {

throw iter.reportError("readObjectFieldAsHash", "unmatched quote");

}

public static final Slice readObjectFieldAsSlice(JsonIterator iter) throws IOException {

if (iter.nextToken() != '"') {

throw iter.reportError("readObjectFieldAsSlice", "expect \"");

}

Slice field = IterImplString.readSlice(iter);

boolean notCopied = field != null;

if (skipWhitespacesWithoutLoadMore(iter)) {

if (notCopied) {

byte[] newBuf = new byte[field.len];

System.arraycopy(field.data, field.head, newBuf, 0, field.len);

field.data = newBuf;

field.head = 0;

field.len = newBuf.length;

}

if (!iter.loadMore()) {

throw iter.reportError("readObjectFieldAsSlice", "expect : after object field");

}

if (iter.buf[iter.head] != ':') {

throw iter.reportError("readObjectFieldAsSlice", "expect : after object field");

}

iter.head++;

if (skipWhitespacesWithoutLoadMore(iter)) {

if (notCopied) {

byte[] newBuf = new byte[field.len];

System.arraycopy(field.data, field.head, newBuf, 0, field.len);

field.data = newBuf;

field.head = 0;

field.len = newBuf.length;

}

if (!iter.loadMore()) {

throw iter.reportError("readObjectFieldAsSlice", "expect : after object field");

}

return field;

}

private final static boolean skipWhitespacesWithoutLoadMore(JsonIterator iter) throws IOException {

for (int i = iter.head; i < iter.tail; i++) {

byte c = iter.buf[i];

switch (c) {

case ' ':

case '\n':

case '\t':

case '\r':

continue;

}

iter.head = i;

return false;

}

return true;

}

java/src/main/java/com/jsoniter/CodegenAccess.java at master · SoftwareKing/java · GitHub

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