| /* |
| * 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.apache.felix.schematizer.impl; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.lang.reflect.ParameterizedType; |
| import java.lang.reflect.Type; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.felix.schematizer.AsDTO; |
| import org.apache.felix.schematizer.Node.CollectionType; |
| import org.osgi.util.converter.TypeReference; |
| |
| public class Util { |
| private static final Map<Class<?>, Class<?>> boxedClasses; |
| static { |
| Map<Class<?>, Class<?>> m = new HashMap<>(); |
| m.put(int.class, Integer.class); |
| m.put(long.class, Long.class); |
| m.put(double.class, Double.class); |
| m.put(float.class, Float.class); |
| m.put(boolean.class, Boolean.class); |
| m.put(char.class, Character.class); |
| m.put(byte.class, Byte.class); |
| m.put(void.class, Void.class); |
| m.put(short.class, Short.class); |
| boxedClasses = Collections.unmodifiableMap(m); |
| } |
| |
| public static Type primitiveToBoxed(Type type) { |
| if (type instanceof Class) |
| return primitiveToBoxed((Class<?>) type); |
| else |
| return null; |
| } |
| |
| public static Class<?> primitiveToBoxed(Class<?> cls) { |
| Class<?> boxed = boxedClasses.get(cls); |
| if (boxed != null) |
| return boxed; |
| else |
| return cls; |
| } |
| |
| public static byte [] readStream(InputStream is) throws IOException { |
| try { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| byte[] bytes = new byte[8192]; |
| |
| int length = 0; |
| int offset = 0; |
| |
| while ((length = is.read(bytes, offset, bytes.length - offset)) != -1) { |
| offset += length; |
| |
| if (offset == bytes.length) { |
| baos.write(bytes, 0, bytes.length); |
| offset = 0; |
| } |
| } |
| if (offset != 0) { |
| baos.write(bytes, 0, offset); |
| } |
| return baos.toByteArray(); |
| } finally { |
| is.close(); |
| } |
| } |
| |
| public static Class<?> rawClassOf(Object type) { |
| Class<?> rawClass = null; |
| if (type instanceof Class) { |
| rawClass = (Class<?>)type; |
| } else if (type instanceof ParameterizedType) { |
| ParameterizedType paramType = (ParameterizedType) type; |
| Type rawType = paramType.getRawType(); |
| if (rawType instanceof Class) |
| rawClass = (Class<?>)rawType; |
| } else if (type instanceof TypeReference) { |
| return rawClassOf(((TypeReference<?>)type).getType()); |
| } |
| |
| return rawClass; |
| } |
| |
| public static TypeReference<?> typeReferenceOf(Object type) { |
| TypeReference<?> typeRef = null; |
| if (type instanceof TypeReference) |
| typeRef = (TypeReference<?>)type; |
| return typeRef; |
| } |
| |
| public static boolean isDTOType(Class<?> cls) { |
| try { |
| cls.getDeclaredConstructor(); |
| } catch (NoSuchMethodException | SecurityException e) { |
| // No zero-arg constructor, not a DTO |
| return false; |
| } |
| |
| // ATTENTION!! (Note from David Leangen) |
| // This may not be according to spec, but without this, it is not possible |
| // to use streams in the constructor, which I think is not intended. |
| if (cls.getDeclaredMethods().length > 0) { |
| return Arrays.stream(cls.getDeclaredMethods()) |
| .map(m -> m.getName()) |
| .allMatch(n -> n.startsWith( "lambda$")); |
| } |
| |
| for (Method m : cls.getMethods()) { |
| try { |
| Object.class.getMethod(m.getName(), m.getParameterTypes()); |
| } catch (NoSuchMethodException snme) { |
| // Not a method defined by Object.class (or override of such method) |
| return false; |
| } |
| } |
| |
| for (Field f : cls.getDeclaredFields()) { |
| int modifiers = f.getModifiers(); |
| if (Modifier.isStatic(modifiers)) { |
| // ignore static fields |
| continue; |
| } |
| |
| if (!Modifier.isPublic(modifiers)) { |
| return false; |
| } |
| } |
| |
| for (Field f : cls.getFields()) { |
| int modifiers = f.getModifiers(); |
| if (Modifier.isStatic(modifiers)) { |
| // ignore static fields |
| continue; |
| } |
| |
| if (!Modifier.isPublic(modifiers)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| public static boolean hasDTOAnnotation(Class<?> clazz) { |
| AsDTO asDTOAnnotation = clazz.getAnnotation(AsDTO.class); |
| return asDTOAnnotation != null; |
| } |
| |
| public static boolean asDTO(Class<?> clazz) { |
| return hasDTOAnnotation(clazz) || isDTOType(clazz); |
| } |
| |
| public static boolean hasCollectionTypeAnnotation(Field field) { |
| if (field == null) |
| return false; |
| |
| Annotation[] annotations = field.getAnnotations(); |
| if (annotations.length == 0) |
| return false; |
| |
| return Arrays.stream(annotations) |
| .map(a -> a.annotationType().getName()) |
| .anyMatch(a -> "CollectionType".equals(a.substring(a.lastIndexOf(".") + 1) )); |
| } |
| |
| public static Class<?> collectionTypeOf(Field field) { |
| Annotation[] annotations = field.getAnnotations(); |
| |
| Annotation annotation = Arrays.stream(annotations) |
| .filter(a -> "CollectionType".equals(a.annotationType().getName().substring(a.annotationType().getName().lastIndexOf(".") + 1) )) |
| .findFirst() |
| .get(); |
| |
| try { |
| Method m = annotation.annotationType().getMethod("value"); |
| Class<?> value = (Class<?>)m.invoke(annotation, (Object[])null); |
| return value; |
| } catch ( Exception e ) { |
| return null; |
| } |
| } |
| |
| public static Class<?> getCollectionTypeOf(Field field) { |
| Class<?> collectionType; |
| CollectionType collectionTypeAnnotation = field.getAnnotation(CollectionType.class); |
| if (collectionTypeAnnotation != null) |
| collectionType = collectionTypeAnnotation.value(); |
| else if (hasCollectionTypeAnnotation(field)) |
| collectionType = collectionTypeOf(field); |
| else |
| collectionType = Object.class; |
| |
| return collectionType; |
| } |
| |
| public static boolean isCollectionType(Class<?> clazz) { |
| return Collection.class.isAssignableFrom(clazz); |
| } |
| |
| public static Map<String, NodeImpl> extractChildren(String path, Map<String, NodeImpl> allNodes) { |
| final Map<String, NodeImpl> children = new HashMap<>(); |
| for (String key : allNodes.keySet()) { |
| String newKey = key.replaceFirst(path, ""); |
| if (!newKey.substring(1).contains("/")) |
| children.put( newKey, allNodes.get(key)); |
| } |
| |
| return children; |
| } |
| } |