JavaConstructorObject.java :  » Swing-Library » Lobo-Java-Web-Browser » org » lobobrowser » js » Java Open Source

/*
    GNU LESSER GENERAL PUBLIC LICENSE
    Copyright (C) 2006 The Lobo Project

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Contact info: lobochief@users.sourceforge.net
*/
package org.lobobrowser.js;

import org.mozilla.javascript.*;

public class JavaConstructorObject extends ScriptableObject implements Function {
  private final JavaClassWrapper classWrapper;
  private final JavaInstantiator instantiator;
  private final String name;
  
  public JavaConstructorObject(String name, JavaClassWrapper classWrapper) {
    this.name = name;
    this.classWrapper = classWrapper;
    this.instantiator = new SimpleInstantiator(classWrapper);
  }

  public JavaConstructorObject(String name, JavaClassWrapper classWrapper, JavaInstantiator instantiator) {
    this.name = name;
    this.classWrapper = classWrapper;
    this.instantiator = instantiator;
  }

  public String getClassName() {
    return this.name;
  }

  public Object call(Context cx, Scriptable scope, Scriptable thisObj, Object[] args) {
    throw new UnsupportedOperationException();
  }

  public Scriptable construct(Context cx, Scriptable scope, Object[] args) {
    try {
      Object javaObject = this.instantiator.newInstance();
      Scriptable newObject = new JavaObjectWrapper(this.classWrapper, javaObject);
      newObject.setParentScope(scope);
      return newObject;
    } catch(Exception err) {
      throw new IllegalStateException(err.getMessage());
    }
  }
  
  public java.lang.Object getDefaultValue(java.lang.Class hint) {
    if(String.class.equals(hint)) {
      return "function " + this.name;
    }
    else {
      return super.getDefaultValue(hint);
    }
  }
  
  public static class SimpleInstantiator implements JavaInstantiator {
    private final JavaClassWrapper classWrapper;

    public SimpleInstantiator(final JavaClassWrapper classWrapper) {
      super();
      this.classWrapper = classWrapper;
    }

    public Object newInstance() throws InstantiationException, IllegalAccessException  {
      return this.classWrapper.newInstance();
    }
  }
}