/*
* Copyright (c) 2014.
*
* BaasBox - info@baasbox.com
*
* 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 com.baasbox.commands;
import com.baasbox.commands.exceptions.CommandException;
import com.baasbox.commands.exceptions.CommandNotFoundException;
import com.baasbox.commands.exceptions.CommandParsingException;
import com.baasbox.service.scripting.base.JsonCallback;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.NullNode;
import java.util.Map;
/**
*
* Created by Andrea Tortorella on 30/06/14.
*/
abstract class Resource {
//todo discuss better naming this behaves more as a namespace
public abstract String name();
public abstract Map<String,ScriptCommand> commands();
public final JsonNode execute(JsonNode request, JsonCallback callback) throws CommandException {
if (request == null) throw new CommandParsingException(NullNode.getInstance(),"Invalid request: null");
JsonNode nameNode = request.get(ScriptCommand.NAME);
if (nameNode != null && nameNode.isTextual()) {
String name = nameNode.textValue();
if (name==null || name.length()==0){
throw new CommandParsingException(request,"Command name cannot be empty");
}
ScriptCommand command = commands().get(name);
if (command == null){
throw new CommandNotFoundException(request,"command not defined: "+name);
}
return command.execute(request,callback);
} else {
throw new CommandParsingException(request,"Missing command name");
}
}
}