# PropertiesModel.java

    /*
     * Copyright (c) 2007-2011, Rickard Öberg. All Rights Reserved.
     *
     * Licensed  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.property;

    import java.lang.reflect.AccessibleObject;
    import java.lang.reflect.Member;
    import java.util.LinkedHashMap;
    import java.util.Map;
    import org.qi4j.api.common.QualifiedName;
    import org.qi4j.functional.HierarchicalVisitor;
    import org.qi4j.functional.VisitableHierarchy;

    /**
     * Base class for properties model
     */
    public class PropertiesModel
        implements VisitableHierarchy<Object, Object>
    {
        protected final Map<AccessibleObject, PropertyModel> mapAccessiblePropertyModel = new LinkedHashMap<>();

        public PropertiesModel()
        {
        }

        public void addProperty( PropertyModel property )
        {
            mapAccessiblePropertyModel.put( property.accessor(), property );
        }

        @Override
        public <ThrowableType extends Throwable> boolean accept( HierarchicalVisitor<? super Object, ? super Object, ThrowableType> visitor )
            throws ThrowableType
        {
            if( visitor.visitEnter( this ) )
            {
                for( PropertyModel propertyModel : mapAccessiblePropertyModel.values() )
                {
                    if( !propertyModel.accept( visitor ) )
                    {
                        break;
                    }
                }
            }

            return visitor.visitLeave( this );
        }

        public Iterable<PropertyModel> properties()
        {
            return mapAccessiblePropertyModel.values();
        }

        public PropertyModel getProperty( AccessibleObject accessor )
        {
            PropertyModel propertyModel = mapAccessiblePropertyModel.get( accessor );
            if( propertyModel == null )
            {
                throw new IllegalArgumentException( "No property found with name: " + ( (Member) accessor ).getName() );
            }

            return propertyModel;
        }

        public PropertyModel getPropertyByName( String name )
            throws IllegalArgumentException
        {
            for( PropertyModel propertyModel : mapAccessiblePropertyModel.values() )
            {
                if( propertyModel.qualifiedName().name().equals( name ) )
                {
                    return propertyModel;
                }
            }
            throw new IllegalArgumentException( "No property found with name: " + name );
        }

        public PropertyModel getPropertyByQualifiedName( QualifiedName name )
            throws IllegalArgumentException
        {
            for( PropertyModel propertyModel : mapAccessiblePropertyModel.values() )
            {
                if( propertyModel.qualifiedName().equals( name ) )
                {
                    return propertyModel;
                }
            }
            throw new IllegalArgumentException( "No property found with qualified name: " + name );
        }
    }