com.ocpsoft.pretty.faces.config.spi.AnnotationConfigurationProvider.java Source code

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Here is the source code for com.ocpsoft.pretty.faces.config.spi.AnnotationConfigurationProvider.java

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/*
 * Copyright 2010 Lincoln Baxter, III
 * 
 * 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 com.ocpsoft.pretty.faces.config.spi;

import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletContext;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.ocpsoft.pretty.faces.config.PrettyConfig;
import com.ocpsoft.pretty.faces.config.PrettyConfigBuilder;
import com.ocpsoft.pretty.faces.config.annotation.ClassFinder;
import com.ocpsoft.pretty.faces.config.annotation.PackageFilter;
import com.ocpsoft.pretty.faces.config.annotation.PrettyAnnotationHandler;
import com.ocpsoft.pretty.faces.config.annotation.WebClassesFinder;
import com.ocpsoft.pretty.faces.config.annotation.WebLibFinder;
import com.ocpsoft.pretty.faces.el.LazyBeanNameFinder;
import com.ocpsoft.pretty.faces.spi.ConfigurationProvider;

/**
 * @author <a href="mailto:lincolnbaxter@gmail.com">Lincoln Baxter, III</a>
 * 
 */
public class AnnotationConfigurationProvider implements ConfigurationProvider {
    private static final Log log = LogFactory.getLog(AnnotationConfigurationProvider.class);

    public static final String CONFIG_SCAN_LIB_DIR = "com.ocpsoft.pretty.SCAN_LIB_DIRECTORY";
    public static final String CONFIG_BASE_PACKAGES = "com.ocpsoft.pretty.BASE_PACKAGES";

    public PrettyConfig loadConfiguration(ServletContext servletContext) {
        String packageFilters = servletContext.getInitParameter(CONFIG_BASE_PACKAGES);

        if ((packageFilters != null) && packageFilters.trim().equalsIgnoreCase("none")) {
            log.debug("Annotation scanning has is disabled!");
            return null;
        }

        PackageFilter packageFilter = new PackageFilter(packageFilters);
        LazyBeanNameFinder beanNameFinder = new LazyBeanNameFinder(servletContext);
        PrettyAnnotationHandler annotationHandler = new PrettyAnnotationHandler(beanNameFinder);

        ClassLoader classloader = Thread.currentThread().getContextClassLoader();
        if (classloader == null) {
            classloader = this.getClass().getClassLoader();
        }

        List<ClassFinder> classFinders = new ArrayList<ClassFinder>();

        // we will always scan /WEB-INF/classes
        classFinders.add(new WebClassesFinder(servletContext, classloader, packageFilter));

        // does the user want to scan /WEB-INF/lib ?
        String jarConfig = servletContext.getInitParameter(CONFIG_SCAN_LIB_DIR);
        if ((jarConfig != null) && jarConfig.trim().equalsIgnoreCase("true")) {
            classFinders.add(new WebLibFinder(servletContext, classloader, packageFilter));
        }

        for (ClassFinder finder : classFinders) {
            finder.findClasses(annotationHandler);
        }

        PrettyConfigBuilder builder = new PrettyConfigBuilder();
        annotationHandler.build(builder);
        return builder.build();
    }
}