TextViewer.java Source code

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Here is the source code for TextViewer.java

Source

/*
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import java.awt.*;
import java.io.*;
import java.beans.*;
import javax.activation.*;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;

/**
 * A very simple TextViewer Bean for the MIMEType "text/plain"
 *
 * @author   Christopher Cotton
 */

public class TextViewer extends JPanel implements CommandObject {

    private JTextArea text_area = null;
    private DataHandler dh = null;
    private String verb = null;

    /**
     * Constructor
     */
    public TextViewer() {
        super(new GridLayout(1, 1));

        // create the text area
        text_area = new JTextArea();
        text_area.setEditable(false);
        text_area.setLineWrap(true);

        // create a scroll pane for the JTextArea
        JScrollPane sp = new JScrollPane();
        sp.setPreferredSize(new Dimension(300, 300));
        sp.getViewport().add(text_area);

        add(sp);
    }

    public void setCommandContext(String verb, DataHandler dh) throws IOException {

        this.verb = verb;
        this.dh = dh;

        this.setInputStream(dh.getInputStream());
    }

    /**
     * set the data stream, component to assume it is ready to
     * be read.
     */
    public void setInputStream(InputStream ins) {

        int bytes_read = 0;
        // check that we can actually read
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte data[] = new byte[1024];

        try {
            while ((bytes_read = ins.read(data)) > 0)
                baos.write(data, 0, bytes_read);
            ins.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

        // convert the buffer into a string
        // place in the text area
        text_area.setText(baos.toString());

    }
}