configurationelementmodel.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 97 行

/*
 * $Id: ConfigurationElementModel.java,v 1.2 2003/12/21 07:49:02 epr Exp $
 */
package org.jnode.plugin.model;

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;

import nanoxml.XMLElement;

import org.jnode.plugin.ConfigurationElement;
import org.jnode.plugin.PluginException;

/**
 * @author epr
 */
public class ConfigurationElementModel extends PluginModelObject implements ConfigurationElement {

	private final String name;
	private final AttributeModel[] attributes;
	private final ConfigurationElement[] elements;

	/**
	 * Create a new instance
	 * @param e
	 */	
	public ConfigurationElementModel(PluginDescriptorModel plugin, XMLElement e) 
	throws PluginException { 
		super(plugin);
		name = e.getName();
		
		final Enumeration aI = e.enumerateAttributeNames();
		if (aI.hasMoreElements()) {
			final ArrayList list = new ArrayList();
			while (aI.hasMoreElements()) {
				final String name = (String)aI.nextElement();
				final String value = e.getStringAttribute(name);
				list.add(new AttributeModel(name, value));
				if (value == null) {
					throw new PluginException("Cannot find attribute value for attribute " + name);
				}
				//System.out.println("name[" + name + "] value[" + value + "]");
			}
			attributes = (AttributeModel[])list.toArray(new AttributeModel[list.size()]);
		} else {
			attributes = null;
		}

		final ArrayList list = new ArrayList();
		for (Iterator i = e.getChildren().iterator(); i.hasNext(); ) {
			final XMLElement ce = (XMLElement)i.next();
			list.add(new ConfigurationElementModel(plugin, ce));
		}
		elements = (ConfigurationElement[])list.toArray(new ConfigurationElement[list.size()]);
	}

	/**
	 * Gets the value of an attribute with a given name
	 * @param name
	 * @return The attribute value, or null if not found
	 */
	public String getAttribute(String name) {
		if (attributes != null) {
			final int max = attributes.length;
			for (int i = 0; i < max; i++) {
				if (attributes[i].getName().equals(name)) {
					return attributes[i].getValue();
				}
			}
		}
		return null;
	}

	/**
	 * Gets all child elements
	 */
	public ConfigurationElement[] getElements() {
		return elements;
	}

	/**
	 * Gets the name of this element
	 */
	public String getName() {
		return name;
	}

	
	/**
	 * Resolve all references to (elements of) other plugin descriptors
	 */
	protected void resolve() {
		// Do nothing 
	}
}