| /* |
| * 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.johnzon.mapper.reflection; |
| |
| import org.apache.johnzon.mapper.Converter; |
| import org.apache.johnzon.mapper.JohnzonConverter; |
| import org.apache.johnzon.mapper.JohnzonIgnore; |
| import org.apache.johnzon.mapper.JohnzonVirtualObject; |
| import org.apache.johnzon.mapper.JohnzonVirtualObjects; |
| import org.apache.johnzon.mapper.access.AccessMode; |
| |
| import java.beans.ConstructorProperties; |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.Array; |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.Modifier; |
| import java.lang.reflect.ParameterizedType; |
| import java.lang.reflect.Type; |
| import java.math.BigDecimal; |
| import java.math.BigInteger; |
| import java.util.Collection; |
| import java.util.Comparator; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.LinkedHashMap; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Queue; |
| import java.util.Set; |
| import java.util.SortedSet; |
| import java.util.TreeMap; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| import static java.util.Arrays.asList; |
| |
| public class Mappings { |
| public static class ClassMapping { |
| public final Class<?> clazz; |
| public final Map<String, Getter> getters; |
| public final Map<String, Setter> setters; |
| public final Constructor<?> constructor; |
| public final boolean constructorHasArguments; |
| public final String[] constructorParameters; |
| public final Converter<?>[] constructorParameterConverters; |
| public final Type[] constructorParameterTypes; |
| |
| protected ClassMapping(final Class<?> clazz, |
| final Map<String, Getter> getters, final Map<String, Setter> setters, |
| final boolean acceptHiddenConstructor, final boolean useConstructor) { |
| this.clazz = clazz; |
| this.getters = getters; |
| this.setters = setters; |
| this.constructor = findConstructor(acceptHiddenConstructor, useConstructor); |
| |
| this.constructorHasArguments = this.constructor != null && this.constructor.getGenericParameterTypes().length > 0; |
| if (this.constructorHasArguments) { |
| this.constructorParameterTypes = this.constructor.getGenericParameterTypes(); |
| |
| this.constructorParameters = new String[this.constructor.getGenericParameterTypes().length]; |
| final ConstructorProperties constructorProperties = this.constructor.getAnnotation(ConstructorProperties.class); |
| System.arraycopy(constructorProperties.value(), 0, this.constructorParameters, 0, this.constructorParameters.length); |
| |
| this.constructorParameterConverters = new Converter<?>[this.constructor.getGenericParameterTypes().length]; |
| for (int i = 0; i < this.constructorParameters.length; i++) { |
| for (final Annotation a : this.constructor.getParameterAnnotations()[i]) { |
| if (a.annotationType() == JohnzonConverter.class) { |
| try { |
| this.constructorParameterConverters[i] = JohnzonConverter.class.cast(a).value().newInstance(); |
| } catch (final Exception e) { |
| throw new IllegalArgumentException(e); |
| } |
| } |
| } |
| } |
| } else { |
| this.constructorParameterTypes = null; |
| this.constructorParameters = null; |
| this.constructorParameterConverters = null; |
| } |
| } |
| |
| private Constructor<?> findConstructor(final boolean acceptHiddenConstructor, final boolean useConstructor) { |
| Constructor<?> found = null; |
| for (final Constructor<?> c : clazz.getDeclaredConstructors()) { |
| if (c.getParameterTypes().length == 0) { |
| if (!Modifier.isPublic(c.getModifiers()) && acceptHiddenConstructor) { |
| c.setAccessible(true); |
| } |
| found = c; |
| if (!useConstructor) { |
| break; |
| } |
| } else if (c.getAnnotation(ConstructorProperties.class) != null) { |
| found = c; |
| break; |
| } |
| } |
| if (found != null) { |
| return found; |
| } |
| try { |
| return clazz.getConstructor(); |
| } catch (final NoSuchMethodException e) { |
| return null; // readOnly class |
| } |
| } |
| } |
| |
| public static class CollectionMapping { |
| public final Class<?> raw; |
| public final Type arg; |
| public final boolean primitive; |
| |
| public CollectionMapping(final boolean primitive, final Class<?> collectionType, final Type fieldArgType) { |
| this.raw = collectionType; |
| this.arg = fieldArgType; |
| this.primitive = primitive; |
| } |
| } |
| |
| public static class Getter { |
| public final AccessMode.Reader reader; |
| public final int version; |
| public final Converter<Object> converter; |
| public final boolean primitive; |
| public final boolean array; |
| public final boolean map; |
| public final boolean collection; |
| |
| public Getter(final AccessMode.Reader reader, |
| final boolean primitive, final boolean array, |
| final boolean collection, final boolean map, |
| final Converter<Object> converter, final int version) { |
| this.reader = reader; |
| this.converter = converter; |
| this.version = version; |
| this.array = array; |
| this.map = map && converter == null; |
| this.collection = collection; |
| this.primitive = primitive; |
| } |
| } |
| |
| public static class Setter { |
| public final AccessMode.Writer writer; |
| public final int version; |
| public final Type paramType; |
| public final Converter<?> converter; |
| public final boolean primitive; |
| public final boolean array; |
| |
| public Setter(final AccessMode.Writer writer, final boolean primitive, final boolean array, |
| final Type paramType, final Converter<?> converter, final int version) { |
| this.writer = writer; |
| this.paramType = paramType; |
| this.converter = converter; |
| this.version = version; |
| this.primitive = primitive; |
| this.array = array; |
| } |
| } |
| |
| private static final JohnzonParameterizedType VIRTUAL_TYPE = new JohnzonParameterizedType(Map.class, String.class, Object.class); |
| |
| protected final ConcurrentMap<Type, ClassMapping> classes = new ConcurrentHashMap<Type, ClassMapping>(); |
| protected final ConcurrentMap<Type, CollectionMapping> collections = new ConcurrentHashMap<Type, CollectionMapping>(); |
| protected final Comparator<String> fieldOrdering; |
| private final boolean supportHiddenConstructors; |
| private final boolean supportConstructors; |
| private final AccessMode accessMode; |
| private final int version; |
| |
| public Mappings(final Comparator<String> attributeOrder, final AccessMode accessMode, |
| final boolean supportHiddenConstructors, final boolean supportConstructors, |
| final int version) { |
| this.fieldOrdering = attributeOrder; |
| this.accessMode = accessMode; |
| this.supportHiddenConstructors = supportHiddenConstructors; |
| this.supportConstructors = supportConstructors; |
| this.version = version; |
| } |
| |
| public <T> CollectionMapping findCollectionMapping(final ParameterizedType genericType) { |
| CollectionMapping collectionMapping = collections.get(genericType); |
| if (collectionMapping == null) { |
| collectionMapping = createCollectionMapping(genericType); |
| if (collectionMapping == null) { |
| return null; |
| } |
| final CollectionMapping existing = collections.putIfAbsent(genericType, collectionMapping); |
| if (existing != null) { |
| collectionMapping = existing; |
| } |
| } |
| return collectionMapping; |
| } |
| |
| private <T> CollectionMapping createCollectionMapping(final ParameterizedType aType) { |
| final Type[] fieldArgTypes = aType.getActualTypeArguments(); |
| final Type raw = aType.getRawType(); |
| if (fieldArgTypes.length == 1 && Class.class.isInstance(raw)) { |
| final Class<?> r = Class.class.cast(raw); |
| final Class<?> collectionType; |
| if (List.class.isAssignableFrom(r)) { |
| collectionType = List.class; |
| }else if (SortedSet.class.isAssignableFrom(r)) { |
| collectionType = SortedSet.class; |
| } else if (Set.class.isAssignableFrom(r)) { |
| collectionType = Set.class; |
| } else if (Queue.class.isAssignableFrom(r)) { |
| collectionType = Queue.class; |
| } else if (Collection.class.isAssignableFrom(r)) { |
| collectionType = Collection.class; |
| } else { |
| return null; |
| } |
| |
| final CollectionMapping mapping = new CollectionMapping(isPrimitive(fieldArgTypes[0]), collectionType, fieldArgTypes[0]); |
| collections.putIfAbsent(aType, mapping); |
| return mapping; |
| } |
| return null; |
| } |
| |
| // has JSon API a method for this type |
| public static boolean isPrimitive(final Type type) { |
| if (type == String.class) { |
| return true; |
| } else if (type == char.class || type == Character.class) { |
| return true; |
| } else if (type == long.class || type == Long.class) { |
| return true; |
| } else if (type == int.class || type == Integer.class |
| || type == byte.class || type == Byte.class |
| || type == short.class || type == Short.class) { |
| return true; |
| } else if (type == double.class || type == Double.class |
| || type == float.class || type == Float.class) { |
| return true; |
| } else if (type == boolean.class || type == Boolean.class) { |
| return true; |
| } else if (type == BigDecimal.class) { |
| return true; |
| } else if (type == BigInteger.class) { |
| return true; |
| } |
| return false; |
| } |
| |
| public ClassMapping getClassMapping(final Type clazz) { |
| return classes.get(clazz); |
| } |
| |
| public ClassMapping findOrCreateClassMapping(final Type clazz) { |
| ClassMapping classMapping = classes.get(clazz); |
| if (classMapping == null) { |
| if (!Class.class.isInstance(clazz) || Map.class.isAssignableFrom(Class.class.cast(clazz))) { |
| return null; |
| } |
| |
| classMapping = createClassMapping(Class.class.cast(clazz)); |
| final ClassMapping existing = classes.putIfAbsent(clazz, classMapping); |
| if (existing != null) { |
| classMapping = existing; |
| } |
| } |
| return classMapping; |
| } |
| |
| private ClassMapping createClassMapping(final Class<?> clazz) { |
| final Map<String, Getter> getters = newOrderedMap(); |
| final Map<String, Setter> setters = newOrderedMap(); |
| |
| final Map<String, AccessMode.Reader> readers = accessMode.findReaders(clazz); |
| final Map<String, AccessMode.Writer> writers = accessMode.findWriters(clazz); |
| |
| final Collection<String> virtualFields = new HashSet<String>(); |
| { |
| final JohnzonVirtualObjects virtualObjects = clazz.getAnnotation(JohnzonVirtualObjects.class); |
| if (virtualObjects != null) { |
| for (final JohnzonVirtualObject virtualObject : virtualObjects.value()) { |
| handleVirtualObject(virtualFields, virtualObject, getters, setters, readers, writers); |
| } |
| } |
| |
| final JohnzonVirtualObject virtualObject = clazz.getAnnotation(JohnzonVirtualObject.class); |
| if (virtualObject != null) { |
| handleVirtualObject(virtualFields, virtualObject, getters, setters, readers, writers); |
| } |
| } |
| |
| for (final Map.Entry<String, AccessMode.Reader> reader : readers.entrySet()) { |
| final String key = reader.getKey(); |
| if (virtualFields.contains(key)) { |
| continue; |
| } |
| addGetterIfNeeded(getters, key, reader.getValue()); |
| } |
| |
| for (final Map.Entry<String, AccessMode.Writer> writer : writers.entrySet()) { |
| final String key = writer.getKey(); |
| if (virtualFields.contains(key)) { |
| continue; |
| } |
| addSetterIfNeeded(setters, key, writer.getValue()); |
| } |
| return new ClassMapping(clazz, getters, setters, supportHiddenConstructors, supportConstructors); |
| } |
| |
| private <T> Map<String, T> newOrderedMap() { |
| return fieldOrdering != null ? new TreeMap<String, T>(fieldOrdering) : new HashMap<String, T>(); |
| } |
| |
| private void addSetterIfNeeded(final Map<String, Setter> setters, |
| final String key, |
| final AccessMode.Writer value) { |
| final JohnzonIgnore writeIgnore = value.getAnnotation(JohnzonIgnore.class); |
| if (writeIgnore == null || writeIgnore.minVersion() >= 0) { |
| if (key.equals("metaClass")) { |
| return; |
| } |
| final Type param = value.getType(); |
| final Class<?> returnType = Class.class.isInstance(param) ? Class.class.cast(param) : null; |
| final Setter setter = new Setter( |
| value, isPrimitive(param), returnType != null && returnType.isArray(), param, |
| findConverter(value), writeIgnore != null ? writeIgnore.minVersion() : -1); |
| setters.put(key, setter); |
| } |
| } |
| |
| private void addGetterIfNeeded(final Map<String, Getter> getters, |
| final String key, |
| final AccessMode.Reader value) { |
| final JohnzonIgnore readIgnore = value.getAnnotation(JohnzonIgnore.class); |
| if (readIgnore == null || readIgnore.minVersion() >= 0) { |
| final Class<?> returnType = Class.class.isInstance(value.getType()) ? Class.class.cast(value.getType()) : null; |
| final ParameterizedType pt = ParameterizedType.class.isInstance(value.getType()) ? ParameterizedType.class.cast(value.getType()) : null; |
| final Getter getter = new Getter(value, isPrimitive(returnType), |
| returnType != null && returnType.isArray(), |
| (pt != null && Collection.class.isAssignableFrom(Class.class.cast(pt.getRawType()))) |
| || (returnType != null && Collection.class.isAssignableFrom(returnType)), |
| (pt != null && Map.class.isAssignableFrom(Class.class.cast(pt.getRawType()))) |
| || (returnType != null && Map.class.isAssignableFrom(returnType)), |
| findConverter(value), |
| readIgnore != null ? readIgnore.minVersion() : -1); |
| getters.put(key, getter); |
| } |
| } |
| |
| // idea is quite trivial, simulate an object with a Map<String, Object> |
| private void handleVirtualObject(final Collection<String> virtualFields, |
| final JohnzonVirtualObject o, |
| final Map<String, Getter> getters, |
| final Map<String, Setter> setters, |
| final Map<String, AccessMode.Reader> readers, |
| final Map<String, AccessMode.Writer> writers) { |
| final String[] path = o.path(); |
| if (path.length < 1) { |
| throw new IllegalArgumentException("@JohnzonVirtualObject need a path"); |
| } |
| |
| // add them to ignored fields |
| for (final JohnzonVirtualObject.Field f : o.fields()) { |
| virtualFields.add(f.value()); |
| } |
| |
| // build "this" model |
| final Map<String, Getter> objectGetters = newOrderedMap(); |
| final Map<String, Setter> objectSetters = newOrderedMap(); |
| |
| for (final JohnzonVirtualObject.Field f : o.fields()) { |
| final String name = f.value(); |
| if (f.read()) { |
| final AccessMode.Reader reader = readers.get(name); |
| if (reader != null) { |
| addGetterIfNeeded(objectGetters, name, reader); |
| } |
| } |
| if (f.write()) { |
| final AccessMode.Writer writer = writers.get(name); |
| if (writer != null) { |
| addSetterIfNeeded(objectSetters, name, writer); |
| } |
| } |
| } |
| |
| final String key = path[0]; |
| |
| final Getter getter = getters.get(key); |
| final MapBuilderReader newReader = new MapBuilderReader(objectGetters, path, version); |
| getters.put(key, new Getter(getter == null ? newReader : new CompositeReader(getter.reader, newReader), false, false, false, true, null, -1)); |
| |
| final Setter newSetter = setters.get(key); |
| final MapUnwrapperWriter newWriter = new MapUnwrapperWriter(objectSetters, path); |
| setters.put(key, new Setter(newSetter == null ? newWriter : new CompositeWriter(newSetter.writer, newWriter), false, false, VIRTUAL_TYPE, null, -1)); |
| } |
| |
| private static Converter findConverter(final AccessMode.DecoratedType method) { |
| Converter converter = null; |
| if (method.getAnnotation(JohnzonConverter.class) != null) { |
| try { |
| converter = method.getAnnotation(JohnzonConverter.class).value().newInstance(); |
| } catch (final Exception e) { |
| throw new IllegalArgumentException(e); |
| } |
| } |
| return converter; |
| } |
| |
| private static class MapBuilderReader implements AccessMode.Reader { |
| private final Map<String, Getter> getters; |
| private final Map<String, Object> template; |
| private final String[] paths; |
| private final int version; |
| |
| public MapBuilderReader(final Map<String, Getter> objectGetters, final String[] paths, final int version) { |
| this.getters = objectGetters; |
| this.paths = paths; |
| this.template = new LinkedHashMap<String, Object>(); |
| this.version = version; |
| |
| Map<String, Object> last = this.template; |
| for (int i = 1; i < paths.length; i++) { |
| final Map<String, Object> newLast = new LinkedHashMap<String, Object>(); |
| last.put(paths[i], newLast); |
| last = newLast; |
| } |
| } |
| |
| @Override |
| public Object read(final Object instance) { |
| final Map<String, Object> map = new LinkedHashMap<String, Object>(template); |
| Map<String, Object> nested = map; |
| for (int i = 1; i < paths.length; i++) { |
| nested = Map.class.cast(nested.get(paths[i])); |
| } |
| for (final Map.Entry<String, Getter> g : getters.entrySet()) { |
| final Mappings.Getter getter = g.getValue(); |
| final Object value = getter.reader.read(instance); |
| final Object val = value == null || getter.converter == null ? value : getter.converter.toString(value); |
| if (val == null) { |
| continue; |
| } |
| if (getter.version >= 0 && version >= getter.version) { |
| continue; |
| } |
| |
| nested.put(g.getKey(), val); |
| } |
| return map; |
| } |
| |
| @Override |
| public Type getType() { |
| return VIRTUAL_TYPE; |
| } |
| |
| @Override |
| public <T extends Annotation> T getAnnotation(final Class<T> clazz) { |
| throw new UnsupportedOperationException("getAnnotation shouldn't get called for virtual fields"); |
| } |
| } |
| |
| private static class MapUnwrapperWriter implements AccessMode.Writer { |
| private final Map<String, Setter> writers; |
| private final Map<String, Class<?>> componentTypes; |
| private final String[] paths; |
| |
| public MapUnwrapperWriter(final Map<String, Setter> writers, final String[] paths) { |
| this.writers = writers; |
| this.paths = paths; |
| this.componentTypes = new HashMap<String, Class<?>>(); |
| |
| for (final Map.Entry<String, Setter> setter : writers.entrySet()) { |
| if (setter.getValue().array) { |
| componentTypes.put(setter.getKey(), Class.class.cast(setter.getValue().paramType).getComponentType()); |
| } |
| } |
| } |
| |
| @Override |
| public void write(final Object instance, final Object value) { |
| Map<String, Object> nested = null; |
| for (final String path : paths) { |
| nested = Map.class.cast(nested == null ? value : nested.get(path)); |
| if (nested == null) { |
| return; |
| } |
| } |
| |
| for (final Map.Entry<String, Setter> setter : writers.entrySet()) { |
| final Setter setterValue = setter.getValue(); |
| final String key = setter.getKey(); |
| final Object rawValue = nested.get(key); |
| Object val = value == null || setterValue.converter == null ? |
| rawValue : Converter.class.cast(setterValue.converter).toString(rawValue); |
| if (val == null) { |
| continue; |
| } |
| |
| if (setterValue.array && Collection.class.isInstance(val)) { |
| final Collection<?> collection = Collection.class.cast(val); |
| final Object[] array = (Object[]) Array.newInstance(componentTypes.get(key), collection.size()); |
| val = collection.toArray(array); |
| } |
| |
| final AccessMode.Writer setterMethod = setterValue.writer; |
| setterMethod.write(instance, val); |
| } |
| } |
| |
| @Override |
| public Type getType() { |
| return VIRTUAL_TYPE; |
| } |
| |
| @Override |
| public <T extends Annotation> T getAnnotation(final Class<T> clazz) { |
| throw new UnsupportedOperationException("getAnnotation shouldn't get called for virtual fields"); |
| } |
| } |
| |
| private static class CompositeReader implements AccessMode.Reader { |
| private final AccessMode.Reader[] delegates; |
| |
| public CompositeReader(final AccessMode.Reader... delegates) { |
| final Collection<AccessMode.Reader> all = new LinkedList<AccessMode.Reader>(); |
| for (final AccessMode.Reader r : delegates) { |
| if (CompositeReader.class.isInstance(r)) { |
| all.addAll(asList(CompositeReader.class.cast(r).delegates)); |
| } else { |
| all.add(r); |
| } |
| } |
| this.delegates = all.toArray(new AccessMode.Reader[all.size()]); |
| } |
| |
| @Override |
| public Object read(final Object instance) { |
| final Map<String, Object> map = new LinkedHashMap<String, Object>(); |
| for (final AccessMode.Reader reader : delegates) { |
| final Map<String, Object> readerMap = (Map<String, Object>) reader.read(instance); |
| for (final Map.Entry<String, Object> entry :readerMap.entrySet()) { |
| final Object o = map.get(entry.getKey()); |
| if (o == null) { |
| map.put(entry.getKey(), entry.getValue()); |
| } else if (Map.class.isInstance(o)) { |
| // TODO |
| } else { |
| throw new IllegalStateException(entry.getKey() + " is ambiguous"); |
| } |
| } |
| } |
| return map; |
| } |
| |
| @Override |
| public Type getType() { |
| return VIRTUAL_TYPE; |
| } |
| |
| @Override |
| public <T extends Annotation> T getAnnotation(final Class<T> clazz) { |
| throw new UnsupportedOperationException("getAnnotation shouldn't get called for virtual fields"); |
| } |
| } |
| |
| private static class CompositeWriter implements AccessMode.Writer { |
| private final AccessMode.Writer[] delegates; |
| |
| public CompositeWriter(final AccessMode.Writer... writers) { |
| final Collection<AccessMode.Writer> all = new LinkedList<AccessMode.Writer>(); |
| for (final AccessMode.Writer r : writers) { |
| if (CompositeWriter.class.isInstance(r)) { |
| all.addAll(asList(CompositeWriter.class.cast(r).delegates)); |
| } else { |
| all.add(r); |
| } |
| } |
| this.delegates = all.toArray(new AccessMode.Writer[all.size()]); |
| } |
| |
| @Override |
| public void write(final Object instance, final Object value) { |
| for (final AccessMode.Writer w : delegates) { |
| w.write(instance, value); |
| } |
| } |
| |
| @Override |
| public Type getType() { |
| return VIRTUAL_TYPE; |
| } |
| |
| @Override |
| public <T extends Annotation> T getAnnotation(final Class<T> clazz) { |
| throw new UnsupportedOperationException("getAnnotation shouldn't get called for virtual fields"); |
| } |
| } |
| } |