package org.opengroupware.jope.appserver;

public class WOResourceURLAssociation extends WOAssociation {
  
  protected String filename = null;
  
  public WOResourceURLAssociation(String _filename) {
    this.filename = _filename;
  }
  
  /* accessors */

  @Override public String keyPath() {
    return this.filename();
  }
  
  public String filename() {
    return this.filename;
  }

  /* reflection */
  
  public boolean isValueConstant() {
    return false;
  }
  
  public boolean isValueSettable() {
    return false;
  }
  
  public boolean isValueConstantInComponent(Object _cursor) {
    return false;
  }
  
  public boolean isValueSettableInComponent(Object _cursor) {
    return false;
  }
  
  /* values */

  public Object valueInComponent(Object _cursor) {
    return this.stringValueInComponent(_cursor);
  }

  /* specific values */
  
  public String stringValueInComponent(Object _cursor) {
    if (_cursor == null)
      return null;
    
    WOResourceManager rm = null;
    WOContext ctx = null;
    
    if (_cursor instanceof WOComponent) {
      rm  = ((WOComponent)_cursor).resourceManager();
      ctx = ((WOComponent)_cursor).context();
    }
    else if (_cursor instanceof WOContext) {
      ctx =  (WOContext)_cursor;
      rm  = ctx.component().resourceManager();
    }
    else if (_cursor instanceof WOApplication)
      rm = ((WOApplication)_cursor).resourceManager();
    else {
      // TODO: we might want to do reflection to retrieve the resourceManager?
      log.error("don't know how to find a resourcemanager " +
                "for object: " + _cursor);
      return null;
    }
    
    if (rm == null)
      return null;
    
    // TODO: implement me: retrieve URL from WOResourceManager
    return rm.urlForResourceNamed(this.filename, null /* framework */,
                                  ctx.languages(), ctx);
  }

  /* description */
  
  public void appendAttributesToDescription(StringBuffer _d) {
    super.appendAttributesToDescription(_d);
    _d.append(" filename=\"" + this.filename + "\"");
  }
}