/** @return 对象提炼类型数组。从对象自身的类型到 Object，中间的继承关系中最有特点的几个类型 */
public Class<?>[] extractTypes() {
return typeExtractor.extract(this);
}
@SuppressWarnings({"rawtypes", "unchecked"})
private static TypeInformation<?> parse(StringBuilder sb) throws ClassNotFoundException {
String infoString = sb.toString();
final Matcher tupleMatcher = tuplePattern.matcher(infoString);
final Matcher writableMatcher = writablePattern.matcher(infoString);
final Matcher enumMatcher = enumPattern.matcher(infoString);
final Matcher basicTypeMatcher = basicTypePattern.matcher(infoString);
final Matcher basicTypeDateMatcher = basicTypeDatePattern.matcher(infoString);
final Matcher primitiveTypeMatcher = primitiveTypePattern.matcher(infoString);
final Matcher valueTypeMatcher = valueTypePattern.matcher(infoString);
final Matcher pojoGenericMatcher = pojoGenericObjectPattern.matcher(infoString);
if (infoString.length() == 0) {
return null;
}
TypeInformation<?> returnType = null;
boolean isPrimitiveType = false;
// tuples
if (tupleMatcher.find()) {
boolean isGenericTuple = true;
String className = tupleMatcher.group(3);
if (className == null) { // matched Tuple0
isGenericTuple = false;
className = tupleMatcher.group(2);
sb.delete(0, className.length());
} else {
sb.delete(0, className.length() + 1); // +1 for "<"
}
if (infoString.startsWith(TUPLE_PACKAGE)) {
sb.delete(0, TUPLE_PACKAGE.length() + 1); // +1 for trailing "."
}
int arity = Integer.parseInt(className.replaceAll("\\D", ""));
Class<?> clazz = loadClass(TUPLE_PACKAGE + "." + className);
TypeInformation<?>[] types = new TypeInformation<?>[arity];
for (int i = 0; i < arity; i++) {
types[i] = parse(sb);
if (types[i] == null) {
throw new IllegalArgumentException("Tuple arity does not match given parameters.");
}
}
if (isGenericTuple) {
if (sb.charAt(0) != '>') {
throw new IllegalArgumentException("Tuple arity does not match given parameters.");
}
// remove '>'
sb.deleteCharAt(0);
}
returnType = new TupleTypeInfo(clazz, types);
}
// writable types
else if (writableMatcher.find()) {
String className = writableMatcher.group(1);
String fullyQualifiedName = writableMatcher.group(3);
sb.delete(0, className.length() + 1 + fullyQualifiedName.length() + 1);
Class<?> clazz = loadClass(fullyQualifiedName);
returnType = WritableTypeInfo.getWritableTypeInfo((Class) clazz);
}
// enum types
else if (enumMatcher.find()) {
String className = enumMatcher.group(1);
String fullyQualifiedName = enumMatcher.group(3);
sb.delete(0, className.length() + 1 + fullyQualifiedName.length() + 1);
Class<?> clazz = loadClass(fullyQualifiedName);
returnType = new EnumTypeInfo(clazz);
}
// basic types
else if (basicTypeMatcher.find()) {
String className = basicTypeMatcher.group(1);
sb.delete(0, className.length());
Class<?> clazz;
// check if fully qualified
if (className.startsWith("java.lang")) {
clazz = loadClass(className);
} else {
clazz = loadClass("java.lang." + className);
}
returnType = BasicTypeInfo.getInfoFor(clazz);
}
// special basic type "Date"
else if (basicTypeDateMatcher.find()) {
String className = basicTypeDateMatcher.group(1);
sb.delete(0, className.length());
Class<?> clazz;
// check if fully qualified
if (className.startsWith("java.util")) {
clazz = loadClass(className);
} else {
clazz = loadClass("java.util." + className);
}
returnType = BasicTypeInfo.getInfoFor(clazz);
}
// primitive types
else if (primitiveTypeMatcher.find()) {
String keyword = primitiveTypeMatcher.group(1);
sb.delete(0, keyword.length());
Class<?> clazz = null;
if (keyword.equals("int")) {
clazz = int.class;
} else if (keyword.equals("byte")) {
clazz = byte.class;
} else if (keyword.equals("short")) {
clazz = short.class;
} else if (keyword.equals("char")) {
clazz = char.class;
} else if (keyword.equals("double")) {
clazz = double.class;
} else if (keyword.equals("float")) {
clazz = float.class;
} else if (keyword.equals("long")) {
clazz = long.class;
} else if (keyword.equals("boolean")) {
clazz = boolean.class;
} else if (keyword.equals("void")) {
clazz = void.class;
}
returnType = BasicTypeInfo.getInfoFor(clazz);
isPrimitiveType = true;
}
// values
else if (valueTypeMatcher.find()) {
String className = valueTypeMatcher.group(1);
sb.delete(0, className.length() + 5);
Class<?> clazz;
// check if fully qualified
if (className.startsWith(VALUE_PACKAGE)) {
clazz = loadClass(className + "Value");
} else {
clazz = loadClass(VALUE_PACKAGE + "." + className + "Value");
}
returnType = ValueTypeInfo.getValueTypeInfo((Class<Value>) clazz);
}
// pojo objects or generic types
else if (pojoGenericMatcher.find()) {
String fullyQualifiedName = pojoGenericMatcher.group(1);
sb.delete(0, fullyQualifiedName.length());
boolean isPojo = pojoGenericMatcher.group(2) != null;
// pojo
if (isPojo) {
sb.deleteCharAt(0);
Class<?> clazz = loadClass(fullyQualifiedName);
ArrayList<PojoField> fields = new ArrayList<PojoField>();
while (sb.charAt(0) != '>') {
final Matcher fieldMatcher = fieldPattern.matcher(sb);
if (!fieldMatcher.find()) {
throw new IllegalArgumentException("Field name missing.");
}
String fieldName = fieldMatcher.group(1);
sb.delete(0, fieldName.length() + 1);
Field field = TypeExtractor.getDeclaredField(clazz, fieldName);
if (field == null) {
throw new IllegalArgumentException("Field '" + fieldName + "'could not be accessed.");
}
fields.add(new PojoField(field, parse(sb)));
}
sb.deleteCharAt(0); // remove '>'
returnType = new PojoTypeInfo(clazz, fields);
}
// generic type
else {
returnType = new GenericTypeInfo(loadClass(fullyQualifiedName));
}
}
if (returnType == null) {
throw new IllegalArgumentException("Error at '" + infoString + "'");
}
// arrays
int arrayDimensionCount = 0;
while (sb.length() > 1 && sb.charAt(0) == '[' && sb.charAt(1) == ']') {
arrayDimensionCount++;
sb.delete(0, 2);
}
if (sb.length() > 0 && sb.charAt(0) == '[') {
throw new IllegalArgumentException("Closing square bracket missing.");
}
// construct multidimension array
if (arrayDimensionCount > 0) {
TypeInformation<?> arrayInfo = null;
// first dimension
// primitive array
if (isPrimitiveType) {
if (returnType == BasicTypeInfo.INT_TYPE_INFO) {
arrayInfo = PrimitiveArrayTypeInfo.INT_PRIMITIVE_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.BYTE_TYPE_INFO) {
arrayInfo = PrimitiveArrayTypeInfo.BYTE_PRIMITIVE_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.SHORT_TYPE_INFO) {
arrayInfo = PrimitiveArrayTypeInfo.SHORT_PRIMITIVE_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.CHAR_TYPE_INFO) {
arrayInfo = PrimitiveArrayTypeInfo.CHAR_PRIMITIVE_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.DOUBLE_TYPE_INFO) {
arrayInfo = PrimitiveArrayTypeInfo.DOUBLE_PRIMITIVE_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.FLOAT_TYPE_INFO) {
arrayInfo = PrimitiveArrayTypeInfo.FLOAT_PRIMITIVE_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.LONG_TYPE_INFO) {
arrayInfo = PrimitiveArrayTypeInfo.LONG_PRIMITIVE_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.BOOLEAN_TYPE_INFO) {
arrayInfo = PrimitiveArrayTypeInfo.BOOLEAN_PRIMITIVE_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.VOID_TYPE_INFO) {
throw new IllegalArgumentException("Can not create an array of void.");
}
}
// basic array
else if (returnType instanceof BasicTypeInfo && returnType != BasicTypeInfo.DATE_TYPE_INFO) {
if (returnType == BasicTypeInfo.INT_TYPE_INFO) {
arrayInfo = BasicArrayTypeInfo.INT_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.BYTE_TYPE_INFO) {
arrayInfo = BasicArrayTypeInfo.BYTE_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.SHORT_TYPE_INFO) {
arrayInfo = BasicArrayTypeInfo.SHORT_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.CHAR_TYPE_INFO) {
arrayInfo = BasicArrayTypeInfo.CHAR_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.DOUBLE_TYPE_INFO) {
arrayInfo = BasicArrayTypeInfo.DOUBLE_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.FLOAT_TYPE_INFO) {
arrayInfo = BasicArrayTypeInfo.FLOAT_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.LONG_TYPE_INFO) {
arrayInfo = BasicArrayTypeInfo.LONG_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.BOOLEAN_TYPE_INFO) {
arrayInfo = BasicArrayTypeInfo.BOOLEAN_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.STRING_TYPE_INFO) {
arrayInfo = BasicArrayTypeInfo.STRING_ARRAY_TYPE_INFO;
} else if (returnType == BasicTypeInfo.VOID_TYPE_INFO) {
throw new IllegalArgumentException("Can not create an array of void.");
}
}
// object array
else {
arrayInfo =
ObjectArrayTypeInfo.getInfoFor(
loadClass("[L" + returnType.getTypeClass().getName() + ";"), returnType);
}
// further dimensions
if (arrayDimensionCount > 1) {
String arrayPrefix = "[";
for (int i = 1; i < arrayDimensionCount; i++) {
arrayPrefix += "[";
arrayInfo =
ObjectArrayTypeInfo.getInfoFor(
loadClass(arrayPrefix + "L" + returnType.getTypeClass().getName() + ";"),
arrayInfo);
}
}
returnType = arrayInfo;
}
// remove possible ','
if (sb.length() > 0 && sb.charAt(0) == ',') {
sb.deleteCharAt(0);
}
// check if end
return returnType;
}