parametertypelist.java

一个很好的LIBSVM的JAVA源码。对于要研究和改进SVM算法的学者。可以参考。来自数据挖掘工具YALE工具包。

/*
 *  YALE - Yet Another Learning Environment
 *  Copyright (C) 2001-2004
 *      Simon Fischer, Ralf Klinkenberg, Ingo Mierswa, 
 *          Katharina Morik, Oliver Ritthoff
 *      Artificial Intelligence Unit
 *      Computer Science Department
 *      University of Dortmund
 *      44221 Dortmund,  Germany
 *  email: [e-mail]
 *  web:   http://yale.cs.uni-dortmund.de/
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License as 
 *  published by the Free Software Foundation; either version 2 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
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU 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
 *  USA.
 */
package edu.udo.cs.yale.operator.parameter;

import java.util.List;
import java.util.LinkedList;
import java.util.Iterator;

public class ParameterTypeList extends ParameterType {

    private List defaultList = new LinkedList();
    private ParameterType valueType;

    public ParameterTypeList(String key, String description, ParameterType valueType) {
	this(key, description, valueType, new LinkedList());
    }

    public ParameterTypeList(String key, String description, ParameterType valueType, List defaultList) {
	super(key, description);
	this.defaultList = defaultList;
	this.valueType = valueType;
	if (valueType.getDescription() == null) valueType.setDescription(description);
    }

    public ParameterType getValueType() {
	return valueType;
    }

    public Object checkValue(Object value) { 
	Iterator i = ((List)value).iterator();
	List newList = new LinkedList();
	while (i.hasNext()) {
	    Object[] current = (Object[])i.next();
	    newList.add(new Object[] {
		(String)current[0],
		valueType.checkValue(current[1])});
	}
	return newList; 
    }

    public Object getDefaultValue() { 
	return defaultList;
    }

    public String getXML(String indent, String key, Object value) {
	StringBuffer result = new StringBuffer();
	result.append(indent+"<list key=\""+key+"\">\n");
	Iterator i = ((List)value).iterator();
	while (i.hasNext()) {
	    Object[] current = (Object[])i.next();
	    result.append(valueType.getXML(indent+"  ", (String)current[0], current[1]));
	} 	
	result.append(indent+"</list>\n");
	return result.toString();
    }

    public String getRange() {
	return "list";
    }
}