/**
 * JBoss, Home of Professional Open Source
 * Copyright 2009, Red Hat, Inc. and/or its affiliates, and individual
 * contributors by the @authors tag. See the copyright.txt in the
 * distribution for a full listing of individual contributors.
 *
 * 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.jboss.weld.environment.se.beans;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.Vetoed;

import org.jboss.weld.environment.se.StartMain;
import org.jboss.weld.environment.se.bindings.Parameters;

/**
 * The simple bean that will hold the command line arguments and make them
 * available by injection (using the @Parameters binding). It's initialised by
 * the StartMain class before your main app is initialised.
 *
 * @author Peter Royle
 */
@Vetoed
@ApplicationScoped
public class ParametersFactory {
    private String[] args;
    private List<String> argsList;

    public ParametersFactory() {
        this.setArgs(StartMain.PARAMETERS);
    }

    /**
     * Producer method for the injectable command line args.
     *
     * @return The command line arguments.
     */
    @Produces
    @Parameters
    public List<String> getArgs() {
        return argsList;
    }

    /**
     * Producer method for the injectable command line args.
     *
     * @return The command line arguments.
     */
    @Produces
    @Parameters
    public String[] getArgsAsArray() {
        return this.args;
    }

    /**
     * StartMain passes in the command line args here.
     *
     * @param args The command line arguments. If null is given then an empty
     *             array will be used instead.
     */
    public void setArgs(String[] args) {
        if (args == null) {
            args = new String[]{};
        }
        this.args = args;
        this.argsList = Collections.unmodifiableList(new ArrayList<String>(Arrays.asList(args)));
    }

}