taverna-wsdl-generic/src/main/java/net/sf/taverna/wsdl/soap/ObjectConverter.java

/*******************************************************************************
 * Copyright (C) 2007 The University of Manchester   
 * 
 *  Modifications to the initial code base are copyright of their
 *  respective authors, or their employers as appropriate.
 * 
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2.1 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
 *  Lesser General Public License for more details.
 *    
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 ******************************************************************************/
package net.sf.taverna.wsdl.soap;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

/**
 * <p>
 * This class replicates the behaviour of data conversion when using DataThingFactory.bake in Taverna 1.
 * </p>
 * <p>
 * In particular it deals with the conversion of arrays to ArrayList
 * </p>
 * @author Stuart Owen
 * 
 *
 */
public class ObjectConverter {

	/**
	 * Converts an Object into an appropriate type, in particular recursively converting [] arrays to List<?>'s.<br>
	 * 
	 * This method is a copy of convertObject in DataThingFactory from Taverna 1
	 * @param theObject
	 * @return
	 */
	public static Object convertObject(Object theObject) {

		if (theObject == null) {
			return null;
		}
		// If an array type...
		Class<?> theClass = theObject.getClass();
		if (theClass.isArray()) {
			// Special case for byte[]
			if (theObject instanceof byte[]) {
				// System.out.println("Found a byte[], returning it.");
				return theObject;
			} //extra primitive object checks for those fun edge cases!
			else if (theObject instanceof int[]){
				List<Object> l = new ArrayList<Object>();
				for (int i = 0; i<((int[])theObject).length;i++) {
					Object a = ((int[])theObject)[i];
					l.add(convertObject(a));
				}
				return l;
			} else if (theObject instanceof short[]){
				List<Object> l = new ArrayList<Object>();
				for (int i = 0; i<((short[])theObject).length;i++) {
					Object a = ((short[])theObject)[i];
					l.add(convertObject(a));
				}
				return l;
			} else if (theObject instanceof long[]){
				List<Object> l = new ArrayList<Object>();
				for (int i = 0; i<((long[])theObject).length;i++) {
					Object a = ((long[])theObject)[i];
					l.add(convertObject(a));
				}
				return l;
			} else if (theObject instanceof float[]){
				List<Object> l = new ArrayList<Object>();
				for (int i = 0; i<((float[])theObject).length;i++) {
					Object a = ((float[])theObject)[i];
					l.add(convertObject(a));
				}
				return l;
			} else if (theObject instanceof double[]){
				List<Object> l = new ArrayList<Object>();
				for (int i = 0; i<((double[])theObject).length;i++) {
					Object a = ((double[])theObject)[i];
					l.add(convertObject(a));
				}
				return l;
			} else if (theObject instanceof boolean[]){
				List<Object> l = new ArrayList<Object>();
				for (int i = 0; i<((boolean[])theObject).length;i++) {
					Object a = ((boolean[])theObject)[i];
					l.add(convertObject(a));
				}
				return l;
			} else if (theObject instanceof char[]){
				List<Object> l = new ArrayList<Object>();
				for (int i = 0; i<((char[])theObject).length;i++) {
					Object a = ((char[])theObject)[i];
					l.add(convertObject(a));
				}
				return l;
			} else {
				// For all other arrays, create a new
				// List and iterate over the array,
				// unpackaging the item and recursively
				// putting it into the new List after
				// conversion				
				
				// System.out.println("Found an array length
				// "+theArray.length+", repacking as List...");
				
				List<Object> l = new ArrayList<Object>();				
				Object[] theArray = (Object[]) theObject;
				for (int i = 0; i < theArray.length; i++) {
					l.add(convertObject(theArray[i]));
				}
				return l;
			}
		}
		// If a collection, iterate over it and copy
		if (theObject instanceof Collection) {
			if (theObject instanceof List) {
				// System.out.println("Re-packing a list...");
				List<Object> l = new ArrayList<Object>();
				for (Iterator<?> i = ((List<?>) theObject).iterator(); i.hasNext();) {
					l.add(convertObject(i.next()));
				}
				return l;
			} else if (theObject instanceof Set) {
				// System.out.println("Re-packing a set...");
				Set<Object> s = new HashSet<Object>();
				for (Iterator<?> i = ((Set<?>) theObject).iterator(); i.hasNext();) {
					s.add(convertObject(i.next()));
				}
				return s;
			}
		}
		// If a number then return the string representation for it
		if (theObject instanceof Number) {
			// System.out.println("Found a number, converting it to a
			// string...");
			return theObject.toString();
		}
		// Otherwise just return the object
		// System.out.println("Found a "+theObject.getClass().getName()+",
		// returning it");
		return theObject;
	}
}