com.npower.dm.setup.task.ModelFamilyManager.java Source code

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Here is the source code for com.npower.dm.setup.task.ModelFamilyManager.java

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/**
  * $Header: /home/master/nWave-DM-Common/src/com/npower/dm/setup/task/ModelFamilyManager.java,v 1.1 2008/09/05 03:24:40 zhao Exp $
  * $Revision: 1.1 $
  * $Date: 2008/09/05 03:24:40 $
  *
  * ===============================================================================================
  * License, Version 1.1
  *
  * Copyright (c) 1994-2007 NPower Network Software Ltd.  All rights reserved.
  *
  * This SOURCE CODE FILE, which has been provided by NPower as part
  * of a NPower product for use ONLY by licensed users of the product,
  * includes CONFIDENTIAL and PROPRIETARY information of NPower.
  *
  * USE OF THIS SOFTWARE IS GOVERNED BY THE TERMS AND CONDITIONS
  * OF THE LICENSE STATEMENT AND LIMITED WARRANTY FURNISHED WITH
  * THE PRODUCT.
  *
  * IN PARTICULAR, YOU WILL INDEMNIFY AND HOLD NPower, ITS RELATED
  * COMPANIES AND ITS SUPPLIERS, HARMLESS FROM AND AGAINST ANY CLAIMS
  * OR LIABILITIES ARISING OUT OF THE USE, REPRODUCTION, OR DISTRIBUTION
  * OF YOUR PROGRAMS, INCLUDING ANY CLAIMS OR LIABILITIES ARISING OUT OF
  * OR RESULTING FROM THE USE, MODIFICATION, OR DISTRIBUTION OF PROGRAMS
  * OR FILES CREATED FROM, BASED ON, AND/OR DERIVED FROM THIS SOURCE
  * CODE FILE.
  * ===============================================================================================
  */
package com.npower.dm.setup.task;

import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.lang.StringUtils;

/**
 * @author Zhao DongLu
 * @version $Revision: 1.1 $ $Date: 2008/09/05 03:24:40 $
 */
public class ModelFamilyManager {

    private static ModelFamilyManager instance = null;

    private Map<String, ModelFamilyItem> families = new HashMap<String, ModelFamilyItem>();

    /**
     * Private constructor
     */
    private ModelFamilyManager() {
        super();
    }

    /**
     * Return a instance of ModelFamilyManager
     * @return
     */
    public static ModelFamilyManager getInstance() {
        synchronized (ModelFamilyManager.class) {
            if (instance == null) {
                instance = new ModelFamilyManager();
            }
            return instance;
        }
    }

    /**
     * Find family for the model
     * @param model
     * @return
     */
    public ModelFamilyItem findModelFamily(ModelItem model) {
        if (model == null) {
            return null;
        }
        return this.findModelFamily(model.getFamilyID());
    }

    /**
     * Get family of familyID
     * @param familyID
     * @return
     */
    public ModelFamilyItem findModelFamily(String familyID) {
        if (familyID == null) {
            return null;
        }
        return this.families.get(familyID.trim());
    }

    /**
     * Add a family into repository.
     * @param item
     */
    public void addModelFamily(ModelFamilyItem item) {
        if (item == null || StringUtils.isEmpty(item.getExternalID())) {
            return;
        }
        this.families.put(item.getExternalID().trim(), item);
    }

    /**
     * Copy family information into modelItem.
     * srcdestEmpty.
     * @param modelItem
     * @param familyItem
     * 
     * @throws IllegalAccessException
     * @throws InvocationTargetException
     * @throws NoSuchMethodException
     */
    @SuppressWarnings("unchecked")
    private void copy(Object src, Object dest)
            throws IllegalAccessException, InvocationTargetException, NoSuchMethodException {
        Map<String, ?> props = PropertyUtils.describe(dest);
        for (String name : props.keySet()) {
            Object value = PropertyUtils.getProperty(dest, name);
            try {
                if (value == null) {
                    Object valueOfFamily = PropertyUtils.getProperty(src, name);
                    PropertyUtils.setProperty(dest, name, valueOfFamily);
                } else if (value instanceof List) {
                    if (((List<?>) value).size() == 0) {
                        Object valueOfFamily = PropertyUtils.getProperty(src, name);
                        PropertyUtils.setProperty(dest, name, valueOfFamily);
                    }
                }
            } catch (NoSuchMethodException e) {

            }
        }
    }

    /**
     * Merge family informations into ModelItem
     * @param item
     * @throws IllegalAccessException
     * @throws InvocationTargetException
     * @throws NoSuchMethodException
     */
    public void merge(ModelItem item)
            throws IllegalAccessException, InvocationTargetException, NoSuchMethodException {
        ModelFamilyItem familyItem = this.findModelFamily(item);
        List<ModelFamilyItem> familyItems = new ArrayList<ModelFamilyItem>();
        while (familyItem != null) {
            familyItems.add(0, familyItem);
            familyItem = this.findModelFamily(familyItem.getParentID());
        }
        familyItem = new ModelFamilyItem();
        for (ModelFamilyItem family : familyItems) {
            PropertyUtils.copyProperties(familyItem, family);
        }
        this.copy(familyItem, item);
    }
}