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core/src/main/java/foundation/stack/datamill/configuration/impl/Classes.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| package foundation.stack.datamill.configuration.impl; | ||
|
|
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| /* | ||
| * Portions of this code were copied from the Apache commons-lang project, notably the source of class | ||
| * org.apache.commons.lang3.ClassUtils. The code is under the following terms: | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
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| import java.util.HashMap; | ||
| import java.util.Map; | ||
|
|
||
| /** | ||
| * @author Ravi Chodavarapu (rchodava@gmail.com) | ||
| */ | ||
| public class Classes { | ||
| private static final Map<Class<?>, Class<?>> primitiveWrapperMap = new HashMap<>(); | ||
|
|
||
| static { | ||
| primitiveWrapperMap.put(Boolean.TYPE, Boolean.class); | ||
| primitiveWrapperMap.put(Byte.TYPE, Byte.class); | ||
| primitiveWrapperMap.put(Character.TYPE, Character.class); | ||
| primitiveWrapperMap.put(Short.TYPE, Short.class); | ||
| primitiveWrapperMap.put(Integer.TYPE, Integer.class); | ||
| primitiveWrapperMap.put(Long.TYPE, Long.class); | ||
| primitiveWrapperMap.put(Double.TYPE, Double.class); | ||
| primitiveWrapperMap.put(Float.TYPE, Float.class); | ||
| primitiveWrapperMap.put(Void.TYPE, Void.TYPE); | ||
| } | ||
|
|
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| private static final Map<Class<?>, Class<?>> wrapperPrimitiveMap = new HashMap<>(); | ||
|
|
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| static { | ||
| for (final Map.Entry<Class<?>, Class<?>> entry : primitiveWrapperMap.entrySet()) { | ||
| final Class<?> primitiveClass = entry.getKey(); | ||
| final Class<?> wrapperClass = entry.getValue(); | ||
| if (!primitiveClass.equals(wrapperClass)) { | ||
| wrapperPrimitiveMap.put(wrapperClass, primitiveClass); | ||
| } | ||
| } | ||
| } | ||
|
|
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| private static Class<?> primitiveToWrapper(final Class<?> clazz) { | ||
| Class<?> convertedClass = clazz; | ||
| if (clazz != null && clazz.isPrimitive()) { | ||
| convertedClass = primitiveWrapperMap.get(clazz); | ||
| } | ||
|
|
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| return convertedClass; | ||
| } | ||
|
|
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| private static Class<?> wrapperToPrimitive(final Class<?> clazz) { | ||
| return wrapperPrimitiveMap.get(clazz); | ||
| } | ||
|
|
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| public static boolean isAssignable(Class<?> clazz, final Class<?> toClass) { | ||
| if (toClass == null) { | ||
| return false; | ||
| } | ||
|
|
||
| if (clazz == null) { | ||
| return !toClass.isPrimitive(); | ||
| } | ||
|
|
||
| if (clazz.isPrimitive() && !toClass.isPrimitive()) { | ||
| clazz = primitiveToWrapper(clazz); | ||
| if (clazz == null) { | ||
| return false; | ||
| } | ||
| } | ||
| if (toClass.isPrimitive() && !clazz.isPrimitive()) { | ||
| clazz = wrapperToPrimitive(clazz); | ||
| if (clazz == null) { | ||
| return false; | ||
| } | ||
| } | ||
|
|
||
| if (clazz.equals(toClass)) { | ||
| return true; | ||
| } | ||
| if (clazz.isPrimitive()) { | ||
| if (!toClass.isPrimitive()) { | ||
| return false; | ||
| } | ||
| if (Integer.TYPE.equals(clazz)) { | ||
| return Long.TYPE.equals(toClass) | ||
| || Float.TYPE.equals(toClass) | ||
| || Double.TYPE.equals(toClass); | ||
| } | ||
| if (Long.TYPE.equals(clazz)) { | ||
| return Float.TYPE.equals(toClass) | ||
| || Double.TYPE.equals(toClass); | ||
| } | ||
| if (Boolean.TYPE.equals(clazz)) { | ||
| return false; | ||
| } | ||
| if (Double.TYPE.equals(clazz)) { | ||
| return false; | ||
| } | ||
| if (Float.TYPE.equals(clazz)) { | ||
| return Double.TYPE.equals(toClass); | ||
| } | ||
| if (Character.TYPE.equals(clazz)) { | ||
| return Integer.TYPE.equals(toClass) | ||
| || Long.TYPE.equals(toClass) | ||
| || Float.TYPE.equals(toClass) | ||
| || Double.TYPE.equals(toClass); | ||
| } | ||
| if (Short.TYPE.equals(clazz)) { | ||
| return Integer.TYPE.equals(toClass) | ||
| || Long.TYPE.equals(toClass) | ||
| || Float.TYPE.equals(toClass) | ||
| || Double.TYPE.equals(toClass); | ||
| } | ||
| if (Byte.TYPE.equals(clazz)) { | ||
| return Short.TYPE.equals(toClass) | ||
| || Integer.TYPE.equals(toClass) | ||
| || Long.TYPE.equals(toClass) | ||
| || Float.TYPE.equals(toClass) | ||
| || Double.TYPE.equals(toClass); | ||
| } | ||
| // should never get here | ||
| return false; | ||
| } | ||
|
|
||
| return toClass.isAssignableFrom(clazz); | ||
| } | ||
| } |
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