InputImpl.java

/*
 * $Id: InputImpl.java 536 2008-02-19 06:03:27Z weiju $
 * 
 * Created on 2006/02/14
 * Copyright 2005-2008 by Wei-ju Wu
 * This file is part of The Z-machine Preservation Project (ZMPP).
 *
 * ZMPP is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * ZMPP 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 General Public License
 * along with ZMPP.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.zmpp.vm;

import org.zmpp.io.InputStream;

public class InputImpl implements Input {

    /**
     * This is the array of input streams.
     */
    private InputStream[] inputStream;

    /**
     * The selected input stream.
     */
    private int selectedInputStreamIndex;

    /**
     * The machine object.
     */
    private Machine machine;

    public InputImpl(Machine machine) {

        this.inputStream = new InputStream[2];
        this.selectedInputStreamIndex = 0;
        this.machine = machine;
    }

    public void close() {

        if (inputStream != null) {

            for (int i = 0; i < inputStream.length; i++) {

                if (inputStream[i] != null) {

                    inputStream[i].close();
                }
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    public void setInputStream(final int streamnumber, final InputStream stream) {

        inputStream[streamnumber] = stream;
    }

    /**
     * {@inheritDoc}
     */
    public void selectInputStream(final int streamnumber) {

        selectedInputStreamIndex = streamnumber;
        machine.getScreen().setPaging(streamnumber != Input.INPUTSTREAM_FILE);
    }

    /**
     * {@inheritDoc}
     */
    public InputStream getSelectedInputStream() {

        return inputStream[selectedInputStreamIndex];
    }

}