ControllerModuleBuilder.java

/*****************************************************************************
 * Copyright 2011 Zdenko Vrabel
 *
 * 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.zdevra.guice.mvc;

import java.util.LinkedList;
import java.util.List;

import org.zdevra.guice.mvc.MvcModule.ControllerAndViewBindingBuilder;
import org.zdevra.guice.mvc.MvcModule.ControllerBindingBuilder;
import org.zdevra.guice.mvc.views.NamedView;

/** 
 * Builder provide building of controller. It's used
 * internally by {@link MvcModule}
 * 
 * @see MvcModule
 */
class ControllerModuleBuilder {

    private String actualUrlPattern;
    private ControllerDefinition actualControllersDefinition = null;
    private List<ServletDefinition> servletDefinitions = new LinkedList<ServletDefinition>();

    /**
     * builder for controller binding
     */
    private class ControllerBindingBuilderImpl implements ControllerBindingBuilder {

        @Override
        public final ControllerBindingBuilder withController(Class<?> controller) {
            actualControllersDefinition.addController(controller);
            return this;
        }

        @Override
        public ControllerBindingBuilder interceptor(Class<? extends InterceptorHandler> handlerClass) {
            actualControllersDefinition.addInterceptorHandler(handlerClass);
            return this;
        }
    }

    private class ControllerAndViewBindingBuilderImpl implements ControllerAndViewBindingBuilder {

        private ControllerDefinition.Factory definitionFactory;

        public ControllerAndViewBindingBuilderImpl(ControllerDefinition.Factory definitionFactory) {
            this.definitionFactory = definitionFactory;
        }

        @Override
        public ControllerBindingBuilder withController(Class<?> controller) {
            //store prev. controller definition
            if (actualControllersDefinition != null) {
                servletDefinitions.add(actualControllersDefinition);
            }

            //create new actual definition.
            actualControllersDefinition = definitionFactory.create(actualUrlPattern);
            actualControllersDefinition.addController(controller);

            return new ControllerBindingBuilderImpl();
        }

        @Override
        public void withView(String name) {
            ServletDefinition def = new DirectViewDefinition(actualUrlPattern, NamedView.create(name));
            servletDefinitions.add(def);
        }

        @Override
        public void withView(ViewPoint viewInstance) {
            ServletDefinition def = new DirectViewDefinition(actualUrlPattern, viewInstance);
            servletDefinitions.add(def);
        }
    }

// ------------------------------------------------------------------------
    public final ControllerAndViewBindingBuilder control(String urlPattern) {
        actualUrlPattern = urlPattern;
        return new ControllerAndViewBindingBuilderImpl(ControllerDefinition.FACTORY);
    }

    public List<ServletDefinition> getControllerDefinitions() {
        if (actualControllersDefinition != null) {
            servletDefinitions.add(actualControllersDefinition);
        }
        return servletDefinitions;
    }
// ------------------------------------------------------------------------
}