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/**
*
* 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 com.agfa.hap.sdo.mapper;
import java.lang.reflect.Constructor;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import com.agfa.hap.sdo.Property;
import com.agfa.hap.sdo.Type;
import com.agfa.hap.sdo.helper.TypeHelper;
/**
* Maps classes onto sdo Type instances.
* <P/>
* This implementation only on classes that are registered
* ({@see {@link #register(Class, String, String)}).
*
* <P />
* This class is thread safe and can be concurrently accessed by multiple threads.
* @author AMOCZ
*/
public class TypeMapper {
public TypeMapper() {
this(new BeanPropertyAccessorBuilder());
}
public TypeMapper(PropertyAccessorBuilder builder) {
this.propertyAccessorBuilder = builder;
}
/**
* Locates a property accessor
*/
public PropertyAccessor property(Class cls, Property property) {
PropertyAccessor[] properties = buildMap(cls);
PropertyAccessor propertyAccessor = properties[property.getIndex()];
if (propertyAccessor == null) {
throw new IllegalArgumentException("Can't access property " + property.getName() + " on " + cls.getName() + ".");
}
return propertyAccessor;
}
private PropertyAccessor[] buildMap(Class cls) {
String clsName = cls.getName();
PropertyAccessor[] props = keyedByPropertyNameCache.get(clsName);
if (props == null) {
// we don't care too much if it is computed more than once under some race conditions
props = propertyAccessorBuilder.buildMap(cls, getCorrespondingType(cls));
keyedByPropertyNameCache.put(clsName, props);
}
return props;
}
public Type getCorrespondingType(Class clazz) {
String[] exc = exceptions.get(clazz);
if (exc != null) {
return TypeHelper.INSTANCE.getType(exc[0], exc[1]);
}
return null;
}
public void register(Class<?> clazz, String uri, String typeName) {
exceptions.put(clazz, new String[] { uri, typeName });
try {
factories.put(typeName, clazz.getConstructor((Class[]) null));
} catch (SecurityException e) {
} catch (NoSuchMethodException e) {
}
}
public Constructor<?> getConstructor(Type type) {
return factories.get(type.getName());
}
private final Map<String, Constructor<?>> factories = new ConcurrentHashMap<String, Constructor<?>>();
private final Map<Class<?>, String[]> exceptions = new ConcurrentHashMap<Class<?>, String[]>();
private final Map<String, PropertyAccessor[]> keyedByPropertyNameCache =
new ConcurrentHashMap<String, PropertyAccessor[]>();
protected final PropertyAccessorBuilder propertyAccessorBuilder;
}
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