UIEEObjectRegistery.java

/*!
 * Copyright 2010 - 2015 Pentaho Corporation.  All rights reserved.
 *
 * 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.
 *
 */
package org.pentaho.di.ui.repository.pur.repositoryexplorer;

import java.lang.reflect.Constructor;

import org.pentaho.di.repository.pur.model.IRole;
import org.pentaho.di.ui.repository.pur.repositoryexplorer.model.UIRepositoryRole;
import org.pentaho.di.ui.repository.repositoryexplorer.model.UIObjectCreationException;

public class UIEEObjectRegistery implements java.io.Serializable {

  private static final long serialVersionUID = 1405941020109398651L; /* EESOURCE: UPDATE SERIALVERUID */

  public static final Class<?> DEFAULT_UIREPOSITORYROLE_CLASS = UIRepositoryRole.class;

  private static UIEEObjectRegistery instance;

  private Class<?> repositoryRoleClass;

  private UIEEObjectRegistery() {

  }

  public static UIEEObjectRegistery getInstance() {
    if ( instance == null ) {
      instance = new UIEEObjectRegistery();
    }
    return instance;
  }

  public void registerUIRepositoryRoleClass( Class<?> repositoryRoleClass ) {
    this.repositoryRoleClass = repositoryRoleClass;
  }

  public Class<?> getRegisteredUIRepositoryRoleClass() {
    return this.repositoryRoleClass;
  }

  public IUIRole constructUIRepositoryRole( IRole role ) throws UIObjectCreationException {
    try {
      if ( repositoryRoleClass == null ) {
        repositoryRoleClass = DEFAULT_UIREPOSITORYROLE_CLASS;
      }
      Constructor<?> constructor = repositoryRoleClass.getConstructor( IRole.class );
      if ( constructor != null ) {
        return (IUIRole) constructor.newInstance( role );
      } else {
        throw new UIObjectCreationException( "Unable to get the constructor for " + repositoryRoleClass );
      }
    } catch ( Exception e ) {
      throw new UIObjectCreationException( "Unable to instantiate object for " + repositoryRoleClass );
    }
  }
}