/*
* 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.converter.impl;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Collections;
import java.util.Dictionary;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import org.osgi.util.converter.ConversionException;
abstract class DynamicMapLikeFacade<K, V> implements Map<K, V> {
protected final ConvertingImpl convertingImpl;
protected DynamicMapLikeFacade(ConvertingImpl convertingImpl) {
this.convertingImpl = convertingImpl;
}
@Override
public int size() {
return keySet().size();
}
@Override
public boolean isEmpty() {
return size() == 0;
}
@Override
public boolean containsKey(Object key) {
return keySet().contains(key);
}
@Override
public boolean containsValue(Object value) {
for (Entry<K, V> entry : entrySet()) {
if (value == null) {
if (entry.getValue() == null) {
return true;
}
} else if (value.equals(entry.getValue())) {
return true;
}
}
return false;
}
@Override
public V put(K key, V value) {
// Should never be called; the delegate should swap to a copy in this case
throw new UnsupportedOperationException();
}
@Override
public V remove(Object key) {
// Should never be called; the delegate should swap to a copy in this case
throw new UnsupportedOperationException();
}
@Override
public void putAll(Map<? extends K, ? extends V> m) {
// Should never be called; the delegate should swap to a copy in this case
throw new UnsupportedOperationException();
}
@Override
public void clear() {
// Should never be called; the delegate should swap to a copy in this case
throw new UnsupportedOperationException();
}
@Override
public Collection<V> values() {
return entrySet().stream().map(Entry::getValue).collect(Collectors.toList());
}
@Override
public Set<Entry<K, V>> entrySet() {
Set<K> ks = keySet();
Set<Entry<K, V>> res = new LinkedHashSet<>(ks.size());
for (K k : ks) {
V v = get(k);
res.add(new MapDelegate.MapEntry<K,V>(k, v));
}
return res;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append('{');
boolean first = true;
for (Map.Entry<K, V> entry : entrySet()) {
if (first)
first = false;
else
sb.append(", ");
sb.append(entry.getKey());
sb.append('=');
sb.append(entry.getValue());
}
sb.append('}');
return sb.toString();
}
}
class DynamicBeanFacade extends DynamicMapLikeFacade<String,Object> {
private Map <String, Method> keys = null;
private final Object backingObject;
DynamicBeanFacade(Object backingObject, ConvertingImpl convertingImpl) {
super(convertingImpl);
this.backingObject = backingObject;
}
@Override
public Object get(Object key) {
Method m = getKeys().get(key);
try {
return m.invoke(backingObject);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
public Set<String> keySet() {
return getKeys().keySet();
}
private Map<String, Method> getKeys() {
if (keys == null)
keys = Util.getBeanKeys(convertingImpl.sourceClass);
return keys;
}
}
class DynamicDictionaryFacade<K,V> extends DynamicMapLikeFacade<K,V> {
private final Dictionary<K, V> backingObject;
DynamicDictionaryFacade(Dictionary<K, V> backingObject, ConvertingImpl convertingImpl) {
super(convertingImpl);
this.backingObject = backingObject;
}
@Override
public V get(Object key) {
return backingObject.get(key);
}
@Override
public Set<K> keySet() {
return new HashSet<>(Collections.list(backingObject.keys()));
}
}
class DynamicMapFacade<K,V> extends DynamicMapLikeFacade<K,V> {
private final Map<K, V> backingObject;
DynamicMapFacade(Map<K,V> backingObject, ConvertingImpl convertingImpl) {
super(convertingImpl);
this.backingObject = backingObject;
}
@Override
public V get(Object key) {
return backingObject.get(key);
}
@Override
public Set<K> keySet() {
Map<K, V> m = backingObject;
return m.keySet();
}
}
class DynamicDTOFacade extends DynamicMapLikeFacade<String, Object> {
private Map <String, Field> keys = null;
private final Object backingObject;
DynamicDTOFacade(Object backingObject, ConvertingImpl converting) {
super(converting);
this.backingObject = backingObject;
}
@Override
public Object get(Object key) {
Field f = getKeys().get(key);
if (f == null)
return null;
try {
return f.get(backingObject);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
public Set<String> keySet() {
return getKeys().keySet();
}
private Map<String, Field> getKeys() {
if (keys == null)
keys = Util.getDTOKeys(convertingImpl.sourceClass);
return keys;
}
}
class DynamicInterfaceFacade extends DynamicMapLikeFacade<String, Object> {
private Map <String, Set<Method>> keys = null;
private final Object backingObject;
DynamicInterfaceFacade(Object backingObject, ConvertingImpl convertingImpl) {
super(convertingImpl);
this.backingObject = backingObject;
}
@Override
public Object get(Object key) {
Set<Method> set = getKeys().get(key);
for (Iterator<Method> iterator = set.iterator();iterator.hasNext();) {
Method m = iterator.next();
if (m.getParameterCount() > 0)
continue;
try {
return m.invoke(backingObject);
} catch (Exception e) {
if (RuntimeException.class.isAssignableFrom(e.getCause().getClass()))
throw ((RuntimeException) e.getCause());
throw new RuntimeException(e);
}
}
throw new ConversionException("Missing no-arg method for key: " + key);
}
@Override
public Set<String> keySet() {
return getKeys().keySet();
}
private Map<String, Set<Method>> getKeys() {
if (keys == null)
keys = Util.getInterfaceKeys(convertingImpl.sourceClass, backingObject);
return keys;
}
}