modelbinding.java

Novocode的 SWT 控件框架 丰富了MDI功能

/*******************************************************************************
 * Copyright (c) 2004 Stefan Zeiger and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.novocode.com/legal/epl-v10.html
 * 
 * Contributors:
 *     Stefan Zeiger ([e-mail]) - initial API and implementation
 *******************************************************************************/

package com.novocode.naf.data;

import java.util.*;
import java.util.Map;

import org.w3c.dom.*;

import com.novocode.naf.app.NAFException;


/**
 * A model binding with parameters.
 * 
 * @author Stefan Zeiger ([e-mail])
 * @since Jan 29, 2004
 */


public final class ModelBinding
{
  public enum Create { DEFAULT, NO, WIDGET };
  
  public final String id;
  public final String type;
  public final Create create;
  public final boolean persist;
  public final int widgetListIdx;

  private Map<String, String> attributes;


  public ModelBinding(Element modelE, int idx) throws NAFException
  {
    widgetListIdx = idx;
    id = modelE.getAttribute("id");
    if(id.length() == 0) throw new NAFException("No model ID given for a model binding");
    create = DataDecoder.decodeEnum(modelE.getAttributeNode("create"), Create.class, Create.DEFAULT);
    type = modelE.getAttribute("type");
    if(type.length() == 0) throw new NAFException("No model type given for a model binding");
    persist = DataDecoder.decodeBoolean(modelE.getAttributeNode("persist"), false);
    NamedNodeMap attrs = modelE.getAttributes();
    if(attrs != null)
    {
      int attrsLength = attrs.getLength();
      for(int i=0; i<attrsLength; i++)
      {
        Node attrN = attrs.item(i);
        String aname = attrN.getLocalName();
        String avalue = attrN.getNodeValue();
        //System.out.println(attrN.getLocalName()+" = "+attrN.getNodeValue());
        if(!"id".equals(aname) && !"type".equals(aname))
        {
          if(attributes == null) attributes = new HashMap<String, String>();
          attributes.put(aname, avalue);
        }
      }
    }
  }
  
  
  public ModelBinding(Attr modelA) throws NAFException
  {
    id = modelA.getValue();
    if(id.length() == 0) throw new NAFException("No model ID given for a model binding");
    type = modelA.getName().substring(2);
    if(type.length() == 0) throw new NAFException("No model type given for a model binding");
    widgetListIdx = 0;
    create = Create.DEFAULT;
    persist = false;
  }
  
  
  public String getAttribute(String key)
  {
    if(attributes == null) return null;
    else return attributes.get(key);
  }
  
  
  public String toString()
  {
    StringBuilder sb = new StringBuilder();
    sb.append("[ModelBinding: type="+type+" id="+id+" create="+create+" persist="+persist+" widgetListIdx="+widgetListIdx);
    if(attributes != null)
    {
      for(Map.Entry<String, String> me : attributes.entrySet())
        sb.append(' ').append(me.getKey()).append('=').append(me.getValue());
    }
    sb.append(']');
    return sb.toString();
  }
}