/*
 * 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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package org.apache.commons.configuration2.builder.combined;

import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;

import org.apache.commons.beanutils.DynaBean;
import org.apache.commons.beanutils.DynaClass;
import org.apache.commons.beanutils.DynaProperty;

An implementation of DynaClass which combines the properties of multiple other DynaClass instances.

Since:2.0
/** * <p> * An implementation of {@code DynaClass} which combines the properties of * multiple other {@code DynaClass} instances. * </p> * * @since 2.0 */
class MultiWrapDynaClass implements DynaClass {
An empty array for converting the properties collection to an array.
/** An empty array for converting the properties collection to an array. */
private static final DynaProperty[] EMPTY_PROPS = new DynaProperty[0];
A collection with all properties of this class.
/** A collection with all properties of this class. */
private final Collection<DynaProperty> properties;
A map for accessing properties by name.
/** A map for accessing properties by name. */
private final Map<String, DynaProperty> namedProperties;
Creates a new instance of MultiWrapDynaClass and initializes it with the collection of classes to be wrapped.
Params:
  • wrappedCls – the collection with wrapped classes
/** * Creates a new instance of {@code MultiWrapDynaClass} and initializes it * with the collection of classes to be wrapped. * * @param wrappedCls the collection with wrapped classes */
public MultiWrapDynaClass(final Collection<? extends DynaClass> wrappedCls) { properties = new LinkedList<>(); namedProperties = new HashMap<>(); initProperties(wrappedCls); }
{@inheritDoc} The name of this class is not relevant.
/** * {@inheritDoc} The name of this class is not relevant. */
@Override public String getName() { return null; } @Override public DynaProperty getDynaProperty(final String name) { return namedProperties.get(name); } @Override public DynaProperty[] getDynaProperties() { return properties.toArray(EMPTY_PROPS); }
{@inheritDoc} This implementation always throws an exception because it is not possible to instantiate a bean of multiple classes.
/** * {@inheritDoc} This implementation always throws an exception because it * is not possible to instantiate a bean of multiple classes. */
@Override public DynaBean newInstance() throws IllegalAccessException, InstantiationException { throw new UnsupportedOperationException( "Cannot create an instance of MultiWrapDynaBean!"); }
Initializes the members related to the properties of the wrapped classes.
Params:
  • wrappedCls – the collection with the wrapped classes
/** * Initializes the members related to the properties of the wrapped classes. * * @param wrappedCls the collection with the wrapped classes */
private void initProperties(final Collection<? extends DynaClass> wrappedCls) { for (final DynaClass cls : wrappedCls) { final DynaProperty[] props = cls.getDynaProperties(); for (final DynaProperty p : props) { properties.add(p); namedProperties.put(p.getName(), p); } } } }