com.jaspersoft.jasperserver.api.common.service.impl.BeanForInterfaceFactoryImpl.java Source code

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Here is the source code for com.jaspersoft.jasperserver.api.common.service.impl.BeanForInterfaceFactoryImpl.java

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/*
 * Copyright (C) 2005 - 2014 TIBCO Software Inc. All rights reserved.
 * http://www.jaspersoft.com.
 *
 * Unless you have purchased  a commercial license agreement from Jaspersoft,
 * the following license terms  apply:
 *
 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero General Public License  as
 * published by the Free Software Foundation, either version 3 of  the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero  General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public  License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.jaspersoft.jasperserver.api.common.service.impl;

import java.util.Comparator;
import java.util.Iterator;
import java.util.Map;
import java.util.SortedSet;
import java.util.TreeSet;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

import com.jaspersoft.jasperserver.api.JSException;
import com.jaspersoft.jasperserver.api.JSExceptionWrapper;
import com.jaspersoft.jasperserver.api.common.service.BeanForInterfaceFactory;

/**
 * @author swood
 *
 */
public class BeanForInterfaceFactoryImpl implements BeanForInterfaceFactory, ApplicationContextAware {
    private static final Log log = LogFactory.getLog(BeanForInterfaceFactoryImpl.class);

    private ApplicationContext ctx;

    public void setApplicationContext(ApplicationContext ctx) {
        this.ctx = ctx;
    }

    private final Comparator itfComparator = new Comparator() {
        public int compare(Object o1, Object o2) {
            Class itf1 = (Class) o1;
            Class itf2 = (Class) o2;

            if (itf1.equals(itf2)) {
                return 0;
            } else if (itf2.isAssignableFrom(itf1)) {
                return -1;
            } else if (itf1.isAssignableFrom(itf2)) {
                return 1;
            } else {
                return itf1.getName().compareTo(itf2.getName());
            }
        }
    };

    /* (non-Javadoc)
     * @see com.jaspersoft.jasperserver.api.common.service.BeanForInterfaceFactory#getBean(java.util.Map, java.lang.Class)
     */
    public String getBeanName(Map interfaceToBeanMappings, Class itfClass) {
        if (interfaceToBeanMappings == null) {
            return null;
        }

        //TODO cache
        try {
            SortedSet interfaces = new TreeSet(itfComparator);

            for (Iterator it = interfaceToBeanMappings.keySet().iterator(); it.hasNext();) {
                String itfName = (String) it.next();
                Class itf = Class.forName(itfName, true, Thread.currentThread().getContextClassLoader());
                if (itf.isAssignableFrom(itfClass)) {
                    interfaces.add(itf);
                }
            }

            if (!interfaces.isEmpty()) {
                Class itf = (Class) interfaces.iterator().next();
                return (String) interfaceToBeanMappings.get(itf.getName());
            }
            return null;
        } catch (ClassNotFoundException e) {
            log.error(e, e);
            throw new JSExceptionWrapper(e);
        }
    }

    /* (non-Javadoc)
     * @see com.jaspersoft.jasperserver.api.common.service.BeanForInterfaceFactory#getBeanName(java.util.Map, java.lang.Class)
     */
    public Object getBean(Map classToBeanMappings, Class _class) {

        String beanName = getBeanName(classToBeanMappings, _class);

        /*
         * TODO Leave this to the caller to handle?
         */
        if (beanName == null) {
            throw new JSException("jsexception.bean.name.not.found.for.interface",
                    new Object[] { _class.getName() });
        }

        Object bean = ctx.getBean(beanName);

        /*
         * TODO Leave this to the caller to handle?
         */
        if (bean == null) {
            throw new JSException("jsexception.bean.no.name", new Object[] { beanName });
        }

        return bean;
    }

    /* (non-Javadoc)
     * @see com.jaspersoft.jasperserver.api.common.service.BeanForInterfaceFactory#hasMapping(java.util.Map, java.lang.Class)
     */
    public boolean hasMapping(Map classToBeanMappings, Class _class) {
        if (classToBeanMappings == null) {
            return false;
        }

        //TODO cache
        try {
            boolean found = false;
            for (Iterator it = classToBeanMappings.keySet().iterator(); it.hasNext();) {
                String itfName = (String) it.next();
                Class itf = Class.forName(itfName, true, Thread.currentThread().getContextClassLoader());
                if (itf.isAssignableFrom(_class)) {
                    found = true;
                    break;
                }
            }
            return found;
        } catch (ClassNotFoundException e) {
            log.error(e, e);
            throw new JSExceptionWrapper(e);
        }
    }

}