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Groovy: A powerful multi-faceted language for the JVM
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.codehaus.groovy.runtime;
import groovy.lang.Closure;
import groovy.lang.GString;
import groovy.lang.GroovyObject;
import groovy.lang.GroovyRuntimeException;
import groovy.lang.MetaClass;
import groovy.lang.MetaMethod;
import org.apache.groovy.util.BeanUtils;
import org.codehaus.groovy.classgen.asm.util.TypeUtil;
import org.codehaus.groovy.reflection.CachedClass;
import org.codehaus.groovy.reflection.ParameterTypes;
import org.codehaus.groovy.reflection.ReflectionCache;
import org.codehaus.groovy.runtime.wrappers.Wrapper;
import org.codehaus.groovy.util.FastArray;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import static org.codehaus.groovy.reflection.stdclasses.CachedSAMClass.getSAMMethod;
public class MetaClassHelper {
public static final Object[] EMPTY_ARRAY = {};
public static final Class [] EMPTY_TYPE_ARRAY = {};
public static final Class [] EMPTY_CLASS_ARRAY = EMPTY_TYPE_ARRAY;
public static final Object[] ARRAY_WITH_NULL = {null}; // mutable!
private static final int MAX_ARG_LEN = 12;
private static final int
OBJECT_SHIFT = 23, INTERFACE_SHIFT = 0,
PRIMITIVE_SHIFT = 21, VARGS_SHIFT = 44;
/* dist binary layout:
* 0-20: interface
* 21-22: primitive dist
* 23-43: object dist
* 44-48: vargs penalty
*/
public static boolean accessibleToConstructor(final Class at, final Constructor constructor) {
boolean accessible = false;
final int modifiers = constructor.getModifiers();
if (Modifier.isPublic(modifiers)) {
accessible = true;
} else if (Modifier.isPrivate(modifiers)) {
accessible = at.getName().equals(constructor.getName());
} else if (Modifier.isProtected(modifiers)) {
Boolean isAccessible = checkCompatiblePackages(at, constructor);
if (isAccessible != null) {
accessible = isAccessible;
} else {
boolean flag = false;
Class clazz = at;
while (!flag && clazz != null) {
if (clazz.equals(constructor.getDeclaringClass())) {
flag = true;
break;
}
if (clazz.equals(Object.class)) {
break;
}
clazz = clazz.getSuperclass();
}
accessible = flag;
}
} else {
Boolean isAccessible = checkCompatiblePackages(at, constructor);
if (isAccessible != null) {
accessible = isAccessible;
}
}
return accessible;
}
private static Boolean checkCompatiblePackages(Class at, Constructor constructor) {
if (at.getPackage() == null && constructor.getDeclaringClass().getPackage() == null) {
return Boolean.TRUE;
}
if (at.getPackage() == null && constructor.getDeclaringClass().getPackage() != null) {
return Boolean.FALSE;
}
if (at.getPackage() != null && constructor.getDeclaringClass().getPackage() == null) {
return Boolean.FALSE;
}
if (at.getPackage().equals(constructor.getDeclaringClass().getPackage())) {
return Boolean.TRUE;
}
return null;
}
public static Object[] asWrapperArray(Object parameters, Class componentType) {
Object[] ret = null;
if (componentType == boolean.class) {
boolean[] array = (boolean[]) parameters;
ret = new Object[array.length];
for (int i = 0; i < array.length; i++) {
ret[i] = array[i];
}
} else if (componentType == char.class) {
char[] array = (char[]) parameters;
ret = new Object[array.length];
for (int i = 0; i < array.length; i++) {
ret[i] = array[i];
}
} else if (componentType == byte.class) {
byte[] array = (byte[]) parameters;
ret = new Object[array.length];
for (int i = 0; i < array.length; i++) {
ret[i] = array[i];
}
} else if (componentType == int.class) {
int[] array = (int[]) parameters;
ret = new Object[array.length];
for (int i = 0; i < array.length; i++) {
ret[i] = array[i];
}
} else if (componentType == short.class) {
short[] array = (short[]) parameters;
ret = new Object[array.length];
for (int i = 0; i < array.length; i++) {
ret[i] = array[i];
}
} else if (componentType == long.class) {
long[] array = (long[]) parameters;
ret = new Object[array.length];
for (int i = 0; i < array.length; i++) {
ret[i] = array[i];
}
} else if (componentType == double.class) {
double[] array = (double[]) parameters;
ret = new Object[array.length];
for (int i = 0; i < array.length; i++) {
ret[i] = array[i];
}
} else if (componentType == float.class) {
float[] array = (float[]) parameters;
ret = new Object[array.length];
for (int i = 0; i < array.length; i++) {
ret[i] = array[i];
}
}
return ret;
}
/**
* @param list the original list
* @param parameterType the resulting array type
* @return the constructed array
*/
public static Object asPrimitiveArray(List list, Class parameterType) {
Class arrayType = parameterType.getComponentType();
Object objArray = Array.newInstance(arrayType, list.size());
for (int i = 0; i < list.size(); i++) {
Object obj = list.get(i);
if (arrayType.isPrimitive()) {
if (obj instanceof Integer) {
Array.setInt(objArray, i, (Integer) obj);
} else if (obj instanceof Double) {
Array.setDouble(objArray, i, (Double) obj);
} else if (obj instanceof Boolean) {
Array.setBoolean(objArray, i, (Boolean) obj);
} else if (obj instanceof Long) {
Array.setLong(objArray, i, (Long) obj);
} else if (obj instanceof Float) {
Array.setFloat(objArray, i, (Float) obj);
} else if (obj instanceof Character) {
Array.setChar(objArray, i, (Character) obj);
} else if (obj instanceof Byte) {
Array.setByte(objArray, i, (Byte) obj);
} else if (obj instanceof Short) {
Array.setShort(objArray, i, (Short) obj);
}
} else {
Array.set(objArray, i, obj);
}
}
return objArray;
}
private static final Class[] PRIMITIVES = {
boolean.class,
Boolean.class,
byte.class,
Byte.class,
short.class,
Short.class,
char.class,
Character.class,
int.class,
Integer.class,
long.class,
Long.class,
BigInteger.class,
float.class,
Float.class,
double.class,
Double.class,
BigDecimal.class,
Number.class,
Object.class
};
private static final int[][] PRIMITIVE_DISTANCE_TABLE = {
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
/*boolean[0]*/ { 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 2,},
/*Boolean[1]*/ { 1, 0, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 2,},
/*byte[2]*/ {18, 19, 0, 1, 2, 3, 16, 17, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,},
/*Byte[3]*/ {18, 19, 1, 0, 2, 3, 16, 17, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,},
/*short[4]*/ {18, 19, 14, 15, 0, 1, 16, 17, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,},
/*Short[5]*/ {18, 19, 14, 15, 1, 0, 16, 17, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,},
/*char[6]*/ {18, 19, 16, 17, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,},
/*Character[7]*/ {18, 19, 16, 17, 14, 15, 1, 0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,},
/*int[8]*/ {18, 19, 14, 15, 12, 13, 16, 17, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,},
/*Integer[9]*/ {18, 19, 14, 15, 12, 13, 16, 17, 1, 0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,},
/*long[10]*/ {18, 19, 14, 15, 12, 13, 16, 17, 10, 11, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,},
/*Long[11]*/ {18, 19, 14, 15, 12, 13, 16, 17, 10, 11, 1, 0, 2, 3, 4, 5, 6, 7, 8, 9,},
/*BigInteger[12]*/ {18, 19, 9, 10, 7, 8, 16, 17, 5, 6, 3, 4, 0, 14, 15, 12, 13, 11, 1, 2,},
/*float[13]*/ {18, 19, 14, 15, 12, 13, 16, 17, 10, 11, 8, 9, 7, 0, 1, 2, 3, 4, 5, 6,},
/*Float[14]*/ {18, 19, 14, 15, 12, 13, 16, 17, 10, 11, 8, 9, 7, 1, 0, 2, 3, 4, 5, 6,},
/*double[15]*/ {18, 19, 14, 15, 12, 13, 16, 17, 10, 11, 8, 9, 7, 5, 6, 0, 1, 2, 3, 4,},
/*Double[16]*/ {18, 19, 14, 15, 12, 13, 16, 17, 10, 11, 8, 9, 7, 5, 6, 1, 0, 2, 3, 4,},
/*BigDecimal[17]*/ {18, 19, 14, 15, 12, 13, 16, 17, 10, 11, 8, 9, 7, 5, 6, 3, 4, 0, 1, 2,},
/*Number[18]*/ {18, 19, 14, 15, 12, 13, 16, 17, 10, 11, 8, 9, 7, 5, 6, 3, 4, 2, 0, 1,},
/*Object[19]*/ {18, 19, 14, 15, 12, 13, 16, 17, 10, 11, 8, 9, 7, 5, 6, 3, 4, 2, 1, 0,},
};
private static int getPrimitiveIndex(Class c) {
for (byte i = 0; i < PRIMITIVES.length; i++) {
if (PRIMITIVES[i] == c) return i;
}
return -1;
}
private static int getPrimitiveDistance(Class from, Class to) {
// we know here that from!=to, so a distance of 0 is never valid
// get primitive type indexes
int fromIndex = getPrimitiveIndex(from);
int toIndex = getPrimitiveIndex(to);
if (fromIndex == -1 || toIndex == -1) return -1;
return PRIMITIVE_DISTANCE_TABLE[toIndex][fromIndex];
}
private static int getMaximumInterfaceDistance(Class c, Class interfaceClass) {
// -1 means a mismatch
if (c == null) return -1;
// 0 means a direct match
if (c == interfaceClass) return 0;
Class[] interfaces = c.getInterfaces();
int max = -1;
for (Class anInterface : interfaces) {
int sub = getMaximumInterfaceDistance(anInterface, interfaceClass);
// we need to keep the -1 to track the mismatch, a +1
// by any means could let it look like a direct match
// we want to add one, because there is an interface between
// the interface we search for and the interface we are in.
if (sub != -1) sub++;
// we are interested in the longest path only
max = Math.max(max, sub);
}
// we do not add one for super classes, only for interfaces
int superClassMax = getMaximumInterfaceDistance(c.getSuperclass(), interfaceClass);
if (superClassMax != -1) superClassMax++;
return Math.max(max, superClassMax);
}
private static int getParameterCount(final Class closureOrLambdaClass) {
int parameterCount = -2;
if (GeneratedClosure.class.isAssignableFrom(closureOrLambdaClass)) {
// determine parameter count from generated "doCall" method(s)
for (Method m : closureOrLambdaClass.getDeclaredMethods()) {
if (m.getName().equals("doCall")) {
if (parameterCount != -2) {
parameterCount = -1; // 0 or 1
} else {
parameterCount = m.getParameterCount();
}
}
}
}
return parameterCount;
}
private static long calculateParameterDistance(final Class argument, final CachedClass parameter) {
/*
* note: when shifting with 32 bit, you should only shift on a long. If you do
* that with an int, then i==(i<<32), which means you loose the shift
* information
*/
Class parameterClass = parameter.getTheClass();
if (parameterClass == argument) {
return 0; // exact match
}
if (parameter.isInterface()) {
long dist = getMaximumInterfaceDistance(argument, parameterClass);
if (dist >= 0 || (argument != null && !Closure.class.isAssignableFrom(argument))) {
return dist << INTERFACE_SHIFT;
}
}
long objectDistance = 0;
if (argument != null) {
long dist = getPrimitiveDistance(parameterClass, argument);
if (dist >= 0) {
return dist << PRIMITIVE_SHIFT;
}
// add one to dist to be sure interfaces are preferred
objectDistance += (PRIMITIVES.length + 1);
// GROOVY-5114: if choosing between foo(Object[]) and foo(Object)
// and the argument is an array, then array version is preferable
if (argument.isArray() && !parameter.isArray) {
objectDistance += 4;
}
Method sam;
for (Class c = TypeUtil.autoboxType(argument); c != null && c != parameterClass; c = c.getSuperclass()) {
if (c == Closure.class && parameterClass.isInterface() && (sam= getSAMMethod(parameterClass)) != null) {
// in case of multiple overloads, give preference to same parameter count
// with fuzzy matching of count for implicit-parameter closures / lambdas
int argParamCount = getParameterCount(argument);
int samParamCount = sam.getParameterCount();
if ((argParamCount == samParamCount) || // GROOVY-9881
(argParamCount == -1 && (samParamCount == 0 || samParamCount == 1))) // GROOVY-10905
objectDistance -= 1;
else if (argParamCount >= 0) // GROOVY-11121
objectDistance += 2;
objectDistance += 5; // ahead of Object but behind GroovyObjectSupport
break;
}
if (c == GString.class && parameterClass == String.class) {
objectDistance += 2;
break;
}
objectDistance += 3;
}
} else if (parameterClass == NullObject.class) {
return 0; // exact match -- GROOVY-9367
} else if (parameterClass == Object.class) {
return 1; // tight match
} else if (parameterClass.isInterface()) {
return 2L << INTERFACE_SHIFT;
} else {
// compute the distance to Object
for (Class c = parameterClass; c != null && c != Object.class; c = c.getSuperclass()) {
objectDistance += 2;
}
}
return objectDistance << OBJECT_SHIFT;
}
public static long calculateParameterDistance(Class[] arguments, ParameterTypes pt) {
CachedClass[] parameters = pt.getParameterTypes();
final int parametersLength = parameters.length;
if (parametersLength == 0) return 0;
long ret = 0;
int noVargsLength = parametersLength - 1;
// if the number of parameters does not match we have
// a vargs usage
//
// case A: arguments.lengthparameters.length
//
// In this case all arguments with a index bigger than
// paramMinus1 are part of the vargs, so a
// distance calculation needs to be done against
// parameters[noVargsLength].getComponentType()
//
// VArgs penalty: 2l+arguments.length-parameters.length
//
// case C: arguments.length==parameters.length &&
// isAssignableFrom( parameters[noVargsLength],
// arguments[noVargsLength] )
//
// In this case we have no vargs, so calculate directly
//
// VArgs penalty: 0l
//
// case D: arguments.length==parameters.length &&
// !isAssignableFrom( parameters[noVargsLength],
// arguments[noVargsLength] )
//
// In this case we have a vargs case again, we need
// to calculate arguments[noVargsLength] against
// parameters[noVargsLength].getComponentType
//
// VArgs penalty: 2l
//
// This gives: VArgs_penalty(C) case B
* def foo(a,b,Object[] c) {2} -> case A
* assert foo(new Object(),new Object()) == 2
* --> A preferred over B
*
* A vs C :
* def foo(Object[] a) {1} -> case B
* def foo(a,b) {2} -> case C
* assert foo(new Object(),new Object()) == 2
* --> C preferred over A
*
* A vs D :
* def foo(Object[] a) {1} -> case D
* def foo(a,Object[] b) {2} -> case A
* assert foo(new Object()) == 2
* --> A preferred over D
*
* This gives C case B
* def foo(a,b) {2} -> case C
* assert foo(new Object(),new Object()) == 2
* --> C preferred over B, matches C case B
* def foo(a,Object[] b) {2} -> case D
* assert foo(new Object(),new Object()) == 2
* --> D preferred over B
*
* This gives C parametersLength) {
// case B
// we give our a vargs penalty for each exceeding argument and iterate
// by using parameters[noVargsLength].getComponentType()
ret += (2L + argumentsLength - parametersLength) << VARGS_SHIFT; // penalty for vargs
CachedClass vargsType = ReflectionCache.getCachedClass(parameters[noVargsLength].getTheClass().getComponentType());
for (int i = noVargsLength; i < argumentsLength; i++) {
ret += calculateParameterDistance(arguments[i], vargsType);
}
} else {
// case A
// we give a penalty for vargs, since we have no direct
// match for the last argument
ret += 1L << VARGS_SHIFT;
}
return ret;
}
/**
* @deprecated Use {@link BeanUtils#capitalize} instead
*/
@Deprecated(forRemoval = true, since = "3.0.0")
public static String capitalize(final String property) {
return BeanUtils.capitalize(property);
}
/**
* @param methods the methods to choose from
* @return the method with 1 parameter which takes the most general type of
* object (e.g. Object)
*/
public static Object chooseEmptyMethodParams(FastArray methods) {
Object vargsMethod = null;
final int len = methods.size();
final Object[] data = methods.getArray();
for (int i = 0; i != len; ++i) {
Object method = data[i];
final ParameterTypes pt = (ParameterTypes) method;
CachedClass[] paramTypes = pt.getParameterTypes();
int paramLength = paramTypes.length;
if (paramLength == 0) {
return method;
} else if (paramLength == 1 && pt.isVargsMethod(EMPTY_ARRAY)) {
vargsMethod = method;
}
}
return vargsMethod;
}
/**
* Warning: this method does not choose properly if multiple methods with
* the same distance are encountered
* @param methods the methods to choose from
* @return the method with 1 parameter which takes the most general type of
* object (e.g. Object) ignoring primitive types
* @deprecated
*/
@Deprecated
public static Object chooseMostGeneralMethodWith1NullParam(FastArray methods) {
// let's look for methods with 1 argument which matches the type of the
// arguments
CachedClass closestClass = null;
CachedClass closestVargsClass = null;
Object answer = null;
int closestDist = -1;
final int len = methods.size();
final Object[] data = methods.getArray();
for (int i = 0; i != len; ++i) {
Object method = data[i];
final ParameterTypes pt = (ParameterTypes) method;
CachedClass[] paramTypes = pt.getParameterTypes();
int paramLength = paramTypes.length;
if (paramLength == 0 || paramLength > 2) continue;
CachedClass theType = paramTypes[0];
if (theType.isPrimitive) continue;
if (paramLength == 2) {
if (!pt.isVargsMethod(ARRAY_WITH_NULL)) continue;
if (closestClass == null) {
closestVargsClass = paramTypes[1];
closestClass = theType;
answer = method;
} else if (closestClass.getTheClass() == theType.getTheClass()) {
if (closestVargsClass == null) continue;
CachedClass newVargsClass = paramTypes[1];
if (isAssignableFrom(newVargsClass.getTheClass(), closestVargsClass.getTheClass())) {
closestVargsClass = newVargsClass;
answer = method;
}
} else if (isAssignableFrom(theType.getTheClass(), closestClass.getTheClass())) {
closestVargsClass = paramTypes[1];
closestClass = theType;
answer = method;
}
} else {
if (closestClass == null || isAssignableFrom(theType.getTheClass(), closestClass.getTheClass())) {
closestVargsClass = null;
closestClass = theType;
answer = method;
closestDist = -1;
} else {
// closestClass and theType are not in a subtype relation, we need
// to check the distance to Object
if (closestDist == -1) closestDist = closestClass.getSuperClassDistance();
int newDist = theType.getSuperClassDistance();
if (newDist < closestDist) {
closestDist = newDist;
closestVargsClass = null;
closestClass = theType;
answer = method;
}
}
}
}
return answer;
}
//
/**
* @param list a list of MetaMethods
* @param method the MetaMethod of interest
* @return true if a method of the same matching prototype was found in the
* list
*/
public static boolean containsMatchingMethod(List list, MetaMethod method) {
for (Object aList : list) {
MetaMethod aMethod = (MetaMethod) aList;
CachedClass[] params1 = aMethod.getParameterTypes();
CachedClass[] params2 = method.getParameterTypes();
if (params1.length == params2.length) {
boolean matches = true;
for (int i = 0; i < params1.length; i++) {
if (params1[i] != params2[i]) {
matches = false;
break;
}
}
if (matches) {
return true;
}
}
}
return false;
}
/**
* Converts array of values (incl. {@code null}) to their respective types.
*
* @param arguments the arguments
* @return the types of the arguments
*/
public static Class[] convertToTypeArray(final Object[] arguments) {
if (arguments == null) return null;
int n = arguments.length;
Class[] types = new Class[n];
for (int i = 0; i < n; i += 1) {
types[i] = getClassWithNullAndWrapper(arguments[i]);
}
return types;
}
public static Object makeCommonArray(Object[] arguments, int offset, Class fallback) {
// arguments.length>0 && !=null
Class baseClass = null;
for (int i = offset; i < arguments.length; i++) {
if (arguments[i] == null) continue;
Class argClass = arguments[i].getClass();
if (baseClass == null) {
baseClass = argClass;
} else {
for (; baseClass != Object.class; baseClass = baseClass.getSuperclass()) {
if (baseClass.isAssignableFrom(argClass)) break;
}
}
}
if (baseClass == null) {
// all arguments were null
baseClass = fallback;
}
/*
* If no specific super class has been found and type fallback is an interface, check if all arg classes
* implement it. If yes, then that interface is the common type across arguments.
*/
if (baseClass == Object.class && fallback.isInterface()) {
int tmpCount = 0;
for (int i = offset; i < arguments.length; i++) {
if (arguments[i] != null) {
Class tmpClass;
Set intfs = new HashSet();
tmpClass = arguments[i].getClass();
for (; tmpClass != Object.class; tmpClass = tmpClass.getSuperclass()) {
intfs.addAll(Arrays.asList(tmpClass.getInterfaces()));
}
if (intfs.contains(fallback)) {
tmpCount++;
}
}
}
// all arg classes implement interface fallback, so use that as the array component type
if (tmpCount == arguments.length - offset) {
baseClass = fallback;
}
}
Object result = makeArray(null, baseClass, arguments.length - offset);
System.arraycopy(arguments, offset, result, 0, arguments.length - offset);
return result;
}
public static Object makeArray(Object obj, Class secondary, int length) {
Class baseClass = secondary;
if (obj != null) {
baseClass = obj.getClass();
}
/*if (GString.class.isAssignableFrom(baseClass)) {
baseClass = GString.class;
}*/
return Array.newInstance(baseClass, length);
}
public static GroovyRuntimeException createExceptionText(String init, MetaMethod method, Object object, Object[] args, Throwable reason, boolean setReason) {
return new GroovyRuntimeException(
init
+ method
+ " on: "
+ object
+ " with arguments: "
+ FormatHelper.toString(args)
+ " reason: "
+ reason,
setReason ? reason : null);
}
protected static String getClassName(Object object) {
if (object == null) return null;
return (object instanceof Class) ? ((Class) object).getName() : object.getClass().getName();
}
/**
* Returns a callable object for the given method name on the object.
* The object acts like a Closure in that it can be called, like a closure
* and passed around - though really it's a method pointer, not a closure per se.
*
* @param object the object containing the method
* @param methodName the method of interest
* @return the resulting closure-like method pointer
*/
public static Closure getMethodPointer(Object object, String methodName) {
return new MethodClosure(object, methodName);
}
public static boolean isAssignableFrom(Class classToTransformTo, Class classToTransformFrom) {
if (classToTransformTo == classToTransformFrom
|| classToTransformFrom == null
|| classToTransformTo == Object.class) {
return true;
}
classToTransformTo = TypeUtil.autoboxType(classToTransformTo);
classToTransformFrom = TypeUtil.autoboxType(classToTransformFrom);
if (classToTransformTo == classToTransformFrom) return true;
// note: there is no coercion for boolean and char. Range matters, precision doesn't
if (classToTransformTo == Integer.class) {
if (classToTransformFrom == Short.class
|| classToTransformFrom == Byte.class
|| classToTransformFrom == BigInteger.class)
return true;
} else if (classToTransformTo == Double.class) {
if (classToTransformFrom == Integer.class
|| classToTransformFrom == Long.class
|| classToTransformFrom == Short.class
|| classToTransformFrom == Byte.class
|| classToTransformFrom == Float.class
|| classToTransformFrom == BigDecimal.class
|| classToTransformFrom == BigInteger.class)
return true;
} else if (classToTransformTo == BigDecimal.class) {
if (classToTransformFrom == Double.class
|| classToTransformFrom == Integer.class
|| classToTransformFrom == Long.class
|| classToTransformFrom == Short.class
|| classToTransformFrom == Byte.class
|| classToTransformFrom == Float.class
|| classToTransformFrom == BigInteger.class)
return true;
} else if (classToTransformTo == BigInteger.class) {
if (isIntegerLongShortByte(classToTransformFrom))
return true;
} else if (classToTransformTo == Long.class) {
if (classToTransformFrom == Integer.class
|| classToTransformFrom == Short.class
|| classToTransformFrom == Byte.class)
return true;
} else if (classToTransformTo == Float.class) {
if (isIntegerLongShortByte(classToTransformFrom))
return true;
} else if (classToTransformTo == Short.class) {
if (classToTransformFrom == Byte.class)
return true;
} else if (classToTransformTo == String.class) {
if (GString.class.isAssignableFrom(classToTransformFrom)) {
return true;
}
}
return classToTransformTo.isAssignableFrom(classToTransformFrom);
}
private static boolean isIntegerLongShortByte(Class classToTransformFrom) {
return classToTransformFrom == Integer.class
|| classToTransformFrom == Long.class
|| classToTransformFrom == Short.class
|| classToTransformFrom == Byte.class;
}
public static boolean isGenericSetMethod(MetaMethod method) {
return (method.getName().equals("set"))
&& method.getParameterTypes().length == 2;
}
protected static boolean isSuperclass(Class clazz, Class superclass) {
while (clazz != null) {
if (clazz == superclass) return true;
clazz = clazz.getSuperclass();
}
return false;
}
public static boolean parametersAreCompatible(Class[] arguments, Class[] parameters) {
final int argumentsLength = arguments.length;
if (argumentsLength != parameters.length) return false;
for (int i = 0; i < argumentsLength; i++) {
if (!isAssignableFrom(parameters[i], arguments[i])) return false;
}
return true;
}
public static void logMethodCall(Object object, String methodName, Object[] arguments) {
String className = getClassName(object);
String logname = "methodCalls." + className + "." + methodName;
Logger objLog = Logger.getLogger(logname);
if (!objLog.isLoggable(Level.FINER)) return;
StringBuilder msg = new StringBuilder(methodName);
msg.append("(");
if (arguments != null) {
for (int i = 0; i < arguments.length;) {
msg.append(normalizedValue(arguments[i]));
if (++i < arguments.length) {
msg.append(",");
}
}
}
msg.append(")");
objLog.logp(Level.FINER, className, msg.toString(), "called from MetaClass.invokeMethod");
}
protected static String normalizedValue(Object argument) {
String value;
try {
value = argument.toString();
if (value.length() > MAX_ARG_LEN) {
value = value.substring(0, MAX_ARG_LEN - 2) + "..";
}
if (argument instanceof String) {
value = "'" + value + "'";
}
} catch (Exception e) {
value = shortName(argument);
}
return value;
}
protected static String shortName(Object object) {
if (object == null || object.getClass() == null) return "unknownClass";
String name = getClassName(object);
if (name == null) return "unknownClassName"; // *very* defensive...
int lastDotPos = name.lastIndexOf('.');
if (lastDotPos < 0 || lastDotPos >= name.length() - 1) return name;
return name.substring(lastDotPos + 1);
}
public static Class[] wrap(Class[] classes) {
Class[] wrappedArguments = new Class[classes.length];
for (int i = 0; i < wrappedArguments.length; i++) {
Class c = classes[i];
if (c == null) continue;
if (c.isPrimitive()) {
if (c == Integer.TYPE) {
c = Integer.class;
} else if (c == Byte.TYPE) {
c = Byte.class;
} else if (c == Long.TYPE) {
c = Long.class;
} else if (c == Double.TYPE) {
c = Double.class;
} else if (c == Float.TYPE) {
c = Float.class;
}
} else if (isSuperclass(c, GString.class)) {
c = String.class;
}
wrappedArguments[i] = c;
}
return wrappedArguments;
}
public static boolean sameClasses(Class[] params, Object[] arguments, boolean weakNullCheck) {
if (params.length != arguments.length)
return false;
for (int i = params.length - 1; i >= 0; i--) {
Object arg = arguments[i];
Class compareClass = getClassWithNullAndWrapper(arg);
if (params[i] != compareClass) return false;
}
return true;
}
private static Class getClassWithNullAndWrapper(Object arg) {
if (arg == null) return null;
if (arg instanceof Wrapper) {
Wrapper w = (Wrapper) arg;
return w.getType();
}
return arg.getClass();
}
public static boolean sameClasses(Class[] params, Object[] arguments) {
if (params.length != arguments.length)
return false;
for (int i = params.length - 1; i >= 0; i--) {
Object arg = arguments[i];
if (arg == null) {
if (params[i] != null)
return false;
} else {
if (params[i] != getClassWithNullAndWrapper(arg))
return false;
}
}
return true;
}
public static boolean sameClasses(Class[] params) {
return params.length == 0;
}
public static boolean sameClasses(Class[] params, Object arg1) {
if (params.length != 1)
return false;
if (params[0] != getClassWithNullAndWrapper(arg1)) return false;
return true;
}
public static boolean sameClasses(Class[] params, Object arg1, Object arg2) {
if (params.length != 2)
return false;
if (params[0] != getClassWithNullAndWrapper(arg1)) return false;
return params[1] == getClassWithNullAndWrapper(arg2);
}
public static boolean sameClasses(Class[] params, Object arg1, Object arg2, Object arg3) {
if (params.length != 3)
return false;
if (params[0] != getClassWithNullAndWrapper(arg1)) return false;
if (params[1] != getClassWithNullAndWrapper(arg2)) return false;
return params[2] == getClassWithNullAndWrapper(arg3);
}
public static boolean sameClasses(Class[] params, Object arg1, Object arg2, Object arg3, Object arg4) {
if (params.length != 4)
return false;
if (params[0] != getClassWithNullAndWrapper(arg1)) return false;
if (params[1] != getClassWithNullAndWrapper(arg2)) return false;
if (params[2] != getClassWithNullAndWrapper(arg3)) return false;
return params[3] == getClassWithNullAndWrapper(arg4);
}
public static boolean sameClass(Class[] params, Object arg) {
return params[0] == getClassWithNullAndWrapper(arg);
}
/**
* @param arguments an array of classes, values, or nulls
*/
public static Class[] castArgumentsToClassArray(final Object[] arguments) {
if (arguments == null || arguments.length == 0) return EMPTY_CLASS_ARRAY;
Class[] types = new Class[arguments.length];
for (int i = 0; i < arguments.length; ++i) {
Object argument = arguments[i];
if (argument instanceof Class) {
types[i] = (Class) argument;
} else if (argument != null) {
types[i] = argument.getClass();
} else {
types[i] = null;
}
}
return types;
}
public static void unwrap(Object[] arguments) {
//
// Temp code to ignore wrapped parameters
// The New MOP will deal with these properly
//
for (int i = 0; i != arguments.length; i++) {
if (arguments[i] instanceof Wrapper) {
arguments[i] = ((Wrapper) arguments[i]).unwrap();
}
}
}
/**
* Sets the metaclass for an object, by delegating to the appropriate
* {@link DefaultGroovyMethods} helper method. This method was introduced as
* a breaking change in 2.0 to solve rare cases of stack overflow. See GROOVY-5285.
*
* The method is named doSetMetaClass in order to prevent misuses. Do not use
* this method directly unless you know what you do.
*
* @param self the object for which to set the metaclass
* @param mc the metaclass
*/
public static void doSetMetaClass(Object self, MetaClass mc) {
if (self instanceof GroovyObject) {
DefaultGroovyMethods.setMetaClass((GroovyObject)self, mc);
} else {
DefaultGroovyMethods.setMetaClass(self, mc);
}
}
/**
* Converts a String into a standard property name.
*
* @param prop the original name
* @return the converted name
*/
public static String convertPropertyName(String prop) {
if (Character.isDigit(prop.charAt(0))) {
return prop;
}
return BeanUtils.decapitalize(prop);
}
}
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