core/runtime/src/main/java/org/qi4j/runtime/composite/TransientStateInstance.java

/*
 * 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.qi4j.runtime.composite;

import java.lang.reflect.AccessibleObject;
import java.util.Map;
import org.qi4j.api.property.Property;
import org.qi4j.api.property.StateHolder;

/**
 * TODO
 */
public final class TransientStateInstance
    implements StateHolder
{
    private final Map<AccessibleObject, Property<?>> properties;

    public TransientStateInstance( Map<AccessibleObject, Property<?>> properties
    )
    {
        this.properties = properties;
    }

    @Override
    @SuppressWarnings( "unchecked" )
    public <T> Property<T> propertyFor( AccessibleObject accessor )
        throws IllegalArgumentException
    {
        Property<T> property = (Property<T>) properties.get( accessor );

        if( property == null )
        {
            throw new IllegalArgumentException( "No such property:" + accessor );
        }

        return property;
    }

    @Override
    public Iterable<Property<?>> properties()
    {
        return properties.values();
    }
}