# InjectedParametersModel.java

    /*
     * Copyright (c) 2008, 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.injection;

    import java.util.ArrayList;
    import java.util.Collection;
    import java.util.List;
    import org.qi4j.api.composite.InjectedParametersDescriptor;
    import org.qi4j.functional.HierarchicalVisitor;
    import org.qi4j.functional.Specification;
    import org.qi4j.functional.VisitableHierarchy;

    /**
     * JAVADOC
     */
    public final class InjectedParametersModel
        implements InjectedParametersDescriptor, Dependencies, VisitableHierarchy<Object, Object>
    {
        private final List<DependencyModel> parameterDependencies;

        public InjectedParametersModel()
        {
            parameterDependencies = new ArrayList<DependencyModel>();
        }

        @Override
        public Iterable<DependencyModel> dependencies()
        {
            return parameterDependencies;
        }

        // Context
        public Object[] newParametersInstance( InjectionContext context )
        {
            Object[] parametersInstance = new Object[ parameterDependencies.size() ];

            // Inject parameterDependencies
            for( int j = 0; j < parameterDependencies.size(); j++ )
            {
                DependencyModel dependencyModel = parameterDependencies.get( j );
                Object parameter = dependencyModel.inject( context );
                parametersInstance[ j ] = parameter;
            }

            return parametersInstance;
        }

        public void addDependency( DependencyModel dependency )
        {
            parameterDependencies.add( dependency );
        }

        @Override
        public <ThrowableType extends Throwable> boolean accept( HierarchicalVisitor<? super Object, ? super Object, ThrowableType> visitor )
            throws ThrowableType
        {
            if( visitor.visitEnter( this ) )
            {
                for( DependencyModel parameterDependency : parameterDependencies )
                {
                    if( !visitor.visit( parameterDependency ) )
                    {
                        break;
                    }
                }
            }
            return visitor.visitLeave( this );
        }

        public Collection<DependencyModel> filter( Specification<DependencyModel> specification )
        {
            ArrayList<DependencyModel> result = new ArrayList<DependencyModel>();
            for( DependencyModel model : parameterDependencies )
            {
                if( specification.satisfiedBy( model ) )
                {
                    result.add( model );
                }
            }
            return result;
        }

        @Override
        public String toString()
        {
            return "InjectedParametersModel{" +
                   "parameterDependencies=" + parameterDependencies +
                   '}';
        }
    }