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Groovy example source code file (PlatformLineWriter.java)

This example Groovy source code file (PlatformLineWriter.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

bufferedwriter, bufferedwriter, io, ioexception, ioexception, platformlinewriter, platformlinewriter, writer, writer

The Groovy PlatformLineWriter.java source code

/*
 * Copyright 2003-2008 the original author or authors.
 *
 * 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 groovy.io;

import java.io.BufferedWriter;
import java.io.Writer;
import java.io.IOException;

/**
 * A buffered writer that gobbles any \r characters
 * and replaces every \n with a platform specific newline.
 * In many places Groovy normalises streams to only have \n
 * characters but when creating files that must be used
 * by other platform-aware tools, you sometimes want the
 * newlines to match what the platform expects.
 *
 * @author Paul King
 */
public class PlatformLineWriter extends Writer {
    private BufferedWriter writer;

    public PlatformLineWriter(Writer out) {
        writer = new BufferedWriter(out);
    }

    public PlatformLineWriter(Writer out, int sz) {
        writer = new BufferedWriter(out, sz);
    }

    public void write(char cbuf[], int off, int len) throws IOException {
        for (; len > 0; len--) {
            char c = cbuf[off++];
            if (c == '\n') {
                writer.newLine();
            } else if (c != '\r') {
                writer.write(c);
            }
        }
    }

    public void flush() throws IOException {
        writer.flush();
    }

    public void close() throws IOException {
        writer.close();
    }
}

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