writablefile.java

大名鼎鼎的java动态脚本语言。已经通过了sun的认证

/*
 * $Id: WritableFile.java,v 1.6 2006/06/09 11:22:20 dierk Exp $
 *
 * Copyright 2003 (C) John Wilson. All Rights Reserved.
 *
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided that the
 * following conditions are met:
 *  1. Redistributions of source code must retain copyright statements and
 * notices. Redistributions must also contain a copy of this document.
 *  2. 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.
 *  3. The name "groovy" must not be used to endorse or promote products
 * derived from this Software without prior written permission of The Codehaus.
 * For written permission, please contact [e-mail].
 *  4. Products derived from this Software may not be called "groovy" nor may
 * "groovy" appear in their names without prior written permission of The
 * Codehaus. "groovy" is a registered trademark of The Codehaus.
 *  5. Due credit should be given to The Codehaus - http://groovy.codehaus.org/
 *
 * THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESSED 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 CODEHAUS OR ITS 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.
 *
 */

package org.codehaus.groovy.runtime;

import groovy.lang.Writable;

import java.io.File;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;

/**
 * A Writable File.
 *
 * @author John Wilson
 *
 */
public class WritableFile extends File implements Writable {
    private final String encoding;

    public WritableFile(final File delegate) {
        this(delegate, null);
    }

    public WritableFile(final File delegate, final String encoding) {
        super(delegate.toURI());
        this.encoding = encoding;
    }

    public Writer writeTo(final Writer out) throws IOException {
        final Reader reader =
            (this.encoding == null)
                ? DefaultGroovyMethods.newReader(this)
                : DefaultGroovyMethods.newReader(this, this.encoding);

        try {
            int c = reader.read();

            while (c != -1) {
                out.write(c);
                c = reader.read();
            }
        }
        finally {
            reader.close();
        }
        return out;
    }
}