Class Json

ZezeJava/ZezeJava/src/main/java/Zeze/Util/Json.java:25–1303

// Compile with JDK11+; Run with JDK8+ (JDK9+ is recommended); Android is NOT supported
public final class Json implements Cloneable {
	static final int TYPE_BOOLEAN = 1; // boolean, Boolean
	static final int TYPE_BYTE = 2; // byte, Byte
	static final int TYPE_SHORT = 3; // short, Short
	static final int TYPE_CHAR = 4; // char, Character
	static final int TYPE_INT = 5; // int, Integer
	static final int TYPE_LONG = 6; // long, Long
	static final int TYPE_FLOAT = 7; // float, Float
	static final int TYPE_DOUBLE = 8; // double, Double
	static final int TYPE_STRING = 9; // String
	static final int TYPE_OBJECT = 10; // Object(null,Boolean,Integer,Long,Double,String,ArrayList<?>,HashMap<?,?>)
	static final int TYPE_POS = 11; // Pos(pos)
	static final int TYPE_CUSTOM = 12; // user custom type
	static final int TYPE_WRAP_FLAG = 0x10; // wrap<1~8>
	static final int TYPE_LIST_FLAG = 0x20; // Collection<1~12> (parser only needs clear() & add(v))
	static final int TYPE_MAP_FLAG = 0x30; // Map<String, 1~12> (parser only needs clear() & put(k,v))

	public interface KeyReader {
		@NotNull Object parse(@NotNull JsonReader jr, int b) throws ReflectiveOperationException;
	}

	public interface Creator<T> {
		T create() throws ReflectiveOperationException;
	}

	public static final class FieldMeta {
		public final int hash; // for FieldMetaMap
		public final int type; // defined above
		public final int offset; // for unsafe access
		public final @NotNull Class<?> klass; // TYPE_CUSTOM:fieldClass; TYPE_LIST_FLAG/TYPE_MAP_FLAG:subValueClass
		transient @Nullable ClassMeta<?> classMeta; // from klass, lazy assigned
		transient @Nullable FieldMeta next; // for FieldMetaMap
		public final byte[] name; // field name
		public final @Nullable Creator<?> ctor; // for TYPE_LIST_FLAG/TYPE_MAP_FLAG
		public final @Nullable KeyReader keyParser; // for TYPE_MAP_FLAG
		public final @NotNull Field field;
		public final @Nullable Type[] paramTypes;

		public FieldMeta(int type, int offset, @NotNull String name, @NotNull Class<?> klass, @Nullable Creator<?> ctor,
						 @Nullable KeyReader keyReader, @NotNull Field field) {
			this.name = name.getBytes(StandardCharsets.UTF_8);
			this.hash = getKeyHash(this.name, 0, this.name.length);
			this.type = type;
			this.offset = offset;
			this.klass = klass;
			this.ctor = ctor;
			this.keyParser = keyReader;
			this.field = field;
			Type geneType = field.getGenericType();
			paramTypes = geneType instanceof ParameterizedType
					? ((ParameterizedType)geneType).getActualTypeArguments() : null;
		}

		public @NotNull String getName() {
			return new String(name, StandardCharsets.UTF_8);
		}
	}