GETNoteCommand.java

package com.temenos.interaction.example.hateoas.dynamic;

/*
 * #%L
 * interaction-example-hateoas-simple
 * %%
 * Copyright (C) 2012 - 2013 Temenos Holdings N.V.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */


import javax.ws.rs.core.Response.Status;

import com.temenos.interaction.core.command.InteractionCommand;
import com.temenos.interaction.core.command.InteractionContext;
import com.temenos.interaction.core.command.InteractionException;
import com.temenos.interaction.core.resource.EntityResource;
import com.temenos.interaction.example.hateoas.dynamic.model.Note;

public class GETNoteCommand implements InteractionCommand {

	private Persistence persistence;
	
	public GETNoteCommand(Persistence p) {
		persistence = p;
	}

	/* Implement InteractionCommand interface */
	
	@Override
	public Result execute(InteractionContext ctx) throws InteractionException {
		assert(ctx != null);
		// retrieve from a database, etc.
		String id = ctx.getId();
		Note note = persistence.getNote(new Long(id));
		if (note != null) {
			ctx.setResource(new EntityResource<Note>(note));
			return Result.SUCCESS;
		} else {
			throw new InteractionException(Status.NOT_FOUND);
		}
	}

}