Package org.strecks.builder

Source Code of org.strecks.builder.InterceptorBuilderImpl

/*
* Copyright 2005-2006 the original author or authors.
*
* 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.strecks.builder;

import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Properties;
import java.util.Set;

import org.strecks.interceptor.AfterInterceptor;
import org.strecks.interceptor.BeforeInterceptor;
import org.strecks.util.Assert;
import org.strecks.util.ReflectHelper;

/**
* Reads implementation classes for interceptors from the
* <code>strecks.properties</code> file located on the class path
* @author Phil Zoio
*/
public class InterceptorBuilderImpl implements InterceptorBuilder
{

  private InterceptorConfig interceptorConfig;
 
  private Collection<BeforeInterceptor> beforeInterceptors = new LinkedHashSet<BeforeInterceptor>();

  private Collection<AfterInterceptor> afterInterceptors = new LinkedHashSet<AfterInterceptor>();

  public void build(String prefix)
  {
    String fileName = getFileName(prefix);
    Properties properties = ConfigUtils.loadProperties(fileName);
    this.interceptorConfig = getInterceptorConfig(properties);
    createInterceptors(this.interceptorConfig);
  }

  protected String getFileName(String prefix)
  {
    return ConfigUtils.getPropertiesFileName(prefix);
 
 
  public InterceptorConfig getInterceptorConfig(Properties properties)
  {
    InterceptorConfig config = new InterceptorConfig();
    int index = 1;
    String beforeInterceptor;

    while ((beforeInterceptor = properties.getProperty("before.interceptor." + index)) != null)
    {
      config.addBeforeInterceptor(beforeInterceptor);
      index++;
    }

    index = 1;
    String afterInterceptor;

    while ((afterInterceptor = properties.getProperty("after.interceptor." + index)) != null)
    {
      config.addAfterInterceptor(afterInterceptor);
      index++;
    }

    return config;
  }

  void createInterceptors(InterceptorConfig config)
  {
    Assert.notNull(config);

    Set<String> beforeNames = config.getBeforeInterceptors();
    for (String className : beforeNames)
    {
      BeforeInterceptor interceptor = ReflectHelper.createInstance(className, BeforeInterceptor.class);
      beforeInterceptors.add(interceptor);
    }

    Set<String> afterNames = config.getAfterInterceptors();
    for (String className : afterNames)
    {
      AfterInterceptor interceptor = ReflectHelper.createInstance(className, AfterInterceptor.class);
      afterInterceptors.add(interceptor);
    }
  }

  public Collection<BeforeInterceptor> getBeforeInterceptors()
  {
    return Collections.unmodifiableCollection(beforeInterceptors);
  }

  public Collection<AfterInterceptor> getAfterInterceptors()
  {
    return Collections.unmodifiableCollection(afterInterceptors);
  }
}
TOP

Related Classes of org.strecks.builder.InterceptorBuilderImpl

TOP
Copyright © 2018 www.massapi.com. All rights reserved.
All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.