core/runtime/src/test/java/org/apache/polygene/runtime/objects/ObjectBuilderFactoryTest.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.apache.polygene.runtime.objects;

import org.apache.polygene.api.activation.ActivationException;
import org.apache.polygene.api.injection.scope.Structure;
import org.apache.polygene.api.injection.scope.Uses;
import org.apache.polygene.api.object.NoSuchObjectTypeException;
import org.apache.polygene.api.structure.Module;
import org.apache.polygene.bootstrap.SingletonAssembler;
import org.junit.Assert;
import org.junit.Test;

import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.notNullValue;

/**
 * Unit tests for ObjectBuilderFactory.
 */
public class ObjectBuilderFactoryTest
{

    /**
     * Tests that an object builder cannot be created for an unregistered object.
     *
     * @throws Exception expected
     */
    @Test( expected = NoSuchObjectTypeException.class )
    public void newBuilderForUnregisteredObject()
        throws Exception
    {
        SingletonAssembler assembler = new SingletonAssembler( module -> {} );
        assembler.module().newObject( AnyObject.class );
    }

    /**
     * Tests that an object builder cannot be created for a 'null' type.
     *
     * @throws Exception expected
     */
    @Test( expected = NullPointerException.class )
    public void newBuilderForNullType()
        throws Exception
    {
        SingletonAssembler assembler = new SingletonAssembler( module -> {} );
        assembler.module().newObject( null );
    }

    /**
     * Tests that an object builder cannot be created for a 'null' type.
     *
     * @throws Exception expected
     */
    @Test( expected = NullPointerException.class )
    public void newObjectInstanceForNullType()
        throws Exception
    {
        SingletonAssembler assembler = new SingletonAssembler( module -> {} );
        assembler.module().newObject( null );
    }

    /**
     * Tests that an object can be created for an registered object class.
     */
    @Test
    public void newInstanceForRegisteredObject()
        throws ActivationException
    {
        SingletonAssembler assembler = new SingletonAssembler( module -> module.objects( AnyObject.class ) );
        assembler.module().newObject( AnyObject.class );
    }

    @Test
    public void givenManyConstructorsWhenInstantiateThenChooseCorrectConstructor()
        throws ActivationException
    {
        SingletonAssembler assembler = new SingletonAssembler( module -> module.objects( ManyConstructorObject.class ) );

        ManyConstructorObject object = assembler.module().newObject( ManyConstructorObject.class );
        Assert.assertThat( "ref is not null", object.anyObject, notNullValue() );

        object = assembler.module()
            .newObject( ManyConstructorObject.class, new AnyObject() );

        Assert.assertThat( "ref is not null", object.anyObject, notNullValue() );
    }

    @Test
    public void givenClassWithInnerClassesWhenInstantiateThenInstantiateInnerClass()
        throws ActivationException
    {
        SingletonAssembler assembler = new SingletonAssembler( module -> module.objects( OuterClass.class ) );

        Assert.assertThat( "inner class has been injected", assembler.module()
            .newObject( OuterClass.class )
            .name(), equalTo( "Module 1" ) );
    }

    public static final class AnyObject
    {
    }

    public static final class ManyConstructorObject
    {
        AnyObject anyObject;
        Module module;

        public ManyConstructorObject( @Uses AnyObject anyObject, @Structure Module module )
        {
            this.anyObject = anyObject;
            this.module = module;
        }

        public ManyConstructorObject( @Structure Module module )
        {
            this.module = module;
        }
    }
}