com.curl.orb.context.Spring2_5ApplicationContext.java Source code

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Here is the source code for com.curl.orb.context.Spring2_5ApplicationContext.java

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// Copyright (C) 1998-2009, Sumisho Computer Systems Corp. 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 com.curl.orb.context;

import java.lang.reflect.InvocationTargetException;

import javax.servlet.ServletContext;

import org.apache.commons.beanutils.MethodUtils;

/**
 * Application context to integrate with spring framework. (http://www.springframework.org/)
 * 
 * @author Hitoshi Okada
 * @since 0.5
 */
public class Spring2_5ApplicationContext extends AbstractApplicationContext {
    // org.springframework.web.context.WebApplicationContext
    private Object context = null;

    /**
     * Create new Spring2_5ApplicationContext
     * 
     * @param context ServletContext
     * @throws ApplicationContextException
     */
    public Spring2_5ApplicationContext(ServletContext context) throws ApplicationContextException {
        try {
            // org.springframework.web.context.support.WebApplicationContextUtils.getRequiredWebApplicationContext(context);
            Class<?> cls = Class.forName("org.springframework.web.context.support.WebApplicationContextUtils");
            this.context = MethodUtils.invokeStaticMethod(cls, "getRequiredWebApplicationContext", context);
        } catch (ClassNotFoundException ex) {
            throw new ApplicationContextException(ex);
        } catch (NoSuchMethodException ex) {
            throw new ApplicationContextException(ex);
        } catch (IllegalAccessException ex) {
            throw new ApplicationContextException(ex);
        } catch (InvocationTargetException ex) {
            throw new ApplicationContextException(ex);
        }
    }

    /*
     * (non-Javadoc)
     * @see com.curl.orb.context.AbstractApplicationContext#getObject(java.lang.String)
     */
    @Override
    public Object getObject(String name) throws ApplicationContextException {
        try {
            // return context.getBean(name);
            return MethodUtils.invokeMethod(context, "getBean", new Object[] { name });
        } catch (NoSuchMethodException ex) {
            throw new ApplicationContextException(ex);
        } catch (IllegalAccessException ex) {
            throw new ApplicationContextException(ex);
        } catch (InvocationTargetException ex) {
            throw new ApplicationContextException(ex);
        }
    }

    /*
     * (non-Javadoc)
     * @see com.curl.orb.context.AbstractApplicationContext#setObject(java.lang.String, java.lang.Object)
     */
    @Override
    public void setObject(String name, Object value) throws ApplicationContextException {
        // do nothing (should throw exception?)
    }

    /*
     * (non-Javadoc)
     * @see com.curl.orb.context.AbstractApplicationContext#getObjectNames()
     */
    @Override
    public String[] getObjectNames() throws ApplicationContextException {
        try {
            // return ((ApplicationContext)this.context).getBeanDefinitionNames();
            return (String[]) MethodUtils.invokeMethod(context, "getBeanDefinitionNames", null);
        } catch (NoSuchMethodException ex) {
            throw new ApplicationContextException(ex);
        } catch (IllegalAccessException ex) {
            throw new ApplicationContextException(ex);
        } catch (InvocationTargetException ex) {
            throw new ApplicationContextException(ex);
        }
    }

    /*
     * (non-Javadoc)
     * @see com.curl.orb.context.AbstractApplicationContext#getObjectType(java.lang.String)
     */
    @Override
    public Class<?> getObjectType(String name) throws ApplicationContextException {
        try {
            // return ((ApplicationContext)this.context).getType();
            return (Class<?>) MethodUtils.invokeMethod(context, "getType", new String[] { name });
        } catch (NoSuchMethodException ex) {
            throw new ApplicationContextException(ex);
        } catch (IllegalAccessException ex) {
            throw new ApplicationContextException(ex);
        } catch (InvocationTargetException ex) {
            throw new ApplicationContextException(ex);
        }
    }

    /** 
     * NOTE:
     *  Spring framework would wrap org.springframework.aop.framework.Advised class as naming of "$ProxyNN"
     *  in the case of implementing interface and session object.
     *  The following method is to fix this spring framework issue.
     */
    @Override
    public Class<?> getProperType(Object obj) throws ApplicationContextException {
        // if (obj instanceof Advised) return ((Advised) obj).getTargetSource().getTargetClass();
        // NOTE: Instead of above remarked codes. (No dependency code on spring framework)
        try {
            Class<?> cls = Class.forName("org.springframework.aop.framework.Advised");
            if (cls.isAssignableFrom(obj.getClass())) {
                Object targetSource = MethodUtils.invokeMethod(obj, "getTargetSource", null);
                return (Class<?>) MethodUtils.invokeMethod(targetSource, "getTargetClass", null);
            }
        } catch (ClassNotFoundException ex) {
            throw new ApplicationContextException(ex);
        } catch (NoSuchMethodException ex) {
            throw new ApplicationContextException(ex);
        } catch (IllegalAccessException ex) {
            throw new ApplicationContextException(ex);
        } catch (InvocationTargetException ex) {
            throw new ApplicationContextException(ex);
        }
        return super.getProperType(obj);
    }
}