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/*--------------------------------------------------------------------------
 *  Copyright 2004 Taro L. Saito
 *
 *  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.
 *--------------------------------------------------------------------------*/
//--------------------------------------
// XerialJ Project
// 
// XMLAttribute.java 
// Since:  2004/05/04
//
// $URL$ 
// $Author$
//--------------------------------------
package org.xerial.xml;

import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

/**
 * XML Attribute
 * 
 * @author leo
 * 
 */
public class XMLAttribute {
    public XMLAttribute(String attributeName, String attributeValue) {
        add(attributeName, attributeValue);
    }

    public XMLAttribute(String attributeName, int attributeValue) {
        add(attributeName, attributeValue);
    }

    public XMLAttribute(String attributeName, double attributeValue) {
        add(attributeName, attributeValue);
    }

    public XMLAttribute(String attributeName, long attributeValue) {
        add(attributeName, attributeValue);
    }

    public XMLAttribute(String attributeName, float attributeValue) {
        add(attributeName, attributeValue);
    }

    public XMLAttribute(String attributeName, boolean attributeValue) {
        add(attributeName, attributeValue);
    }

    public XMLAttribute(String attributeName, Object attributeValue) {
        add(attributeName, attributeValue);
    }

    public XMLAttribute() {}

    public XMLAttribute add(String attributeName, String attributeValue) {
        String name = XMLGenerator.replaceWhiteSpaces(attributeName);
        _attributeNameList.add(name);
        _attributeValue.put(name, attributeValue);
        return this;
    }

    public XMLAttribute add(String attributeName, int attributeValue) {
        return this.add(attributeName, Integer.toString(attributeValue));
    }

    public XMLAttribute add(String attributeName, double attributeValue) {
        return this.add(attributeName, Double.toString(attributeValue));
    }

    public XMLAttribute add(String attributeName, long attributeValue) {
        return this.add(attributeName, Long.toString(attributeValue));
    }

    public XMLAttribute add(String attributeName, float attributeValue) {
        return this.add(attributeName, Float.toString(attributeValue));
    }

    public XMLAttribute add(String attributeName, boolean attributeValue) {
        return this.add(attributeName, Boolean.toString(attributeValue));
    }

    public XMLAttribute add(String attributeName, Object attributeValue) {
        return this.add(attributeName, attributeValue.toString());
    }

    public XMLAttribute(Properties properties) {
        Set< ? > keySet = properties.keySet();
        for (Object attributeObj : keySet) {
            String attribute = XMLGenerator.replaceWhiteSpaces(attributeObj.toString());
            String value = properties.getProperty(attribute);
            this.add(attribute, value);
        }
    }

    public XMLAttribute(Map< ? , ? > properties) {
        Set< ? > keySet = properties.keySet();
        for (Object attributeObj : keySet) {
            String attribute = XMLGenerator.replaceWhiteSpaces(attributeObj.toString());
            String value = properties.get(attribute).toString();
            this.add(attribute, value);
        }
    }

    /**
     * @param attributeName
     * @return attributeName
     */
    public String getValue(String attributeName) {
        return (String) _attributeValue.get(attributeName);
    }

    /**
     * @return
     */
    public List getAttributeNames() {
        return _attributeNameList;
    }

    public String getName(int index) {
        return _attributeNameList.get(index);
    }

    public String getValue(int index) {
        return _attributeValue.get(_attributeNameList.get(index));
    }

    /**
     * @return the number of attributes
     */
    public int length() {
        return _attributeNameList.size();
    }

    /**
     * @return
     */
    public String toXMLString() {
        String returnString = "";
        for (String attributeName : _attributeNameList) {
            String attributeValue = _attributeValue.get(attributeName);
            returnString += attributeName + "=\"" + attributeValue + "\" ";
        }
        if (!returnString.equals("")) {
            // remove the unnecessary white space
            return returnString.substring(0, returnString.length() - 1);
        }
        else
            return returnString;
    }

    protected LinkedList _attributeNameList = new LinkedList();
    protected HashMap _attributeValue = new HashMap();
}