/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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
 *
 *    https://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.grails.encoder;

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

import org.grails.charsequences.CharSequences;

/**
 * An EncodedAppender implementation that writes to a java.io.Writer.
 *
 * @author Lari Hotari
 * @since 2.3
 */
public class WriterEncodedAppender extends AbstractEncodedAppender {
    private Writer target;

    /**
     * Default constructor.
     *
     * @param target the target writer
     */
    public WriterEncodedAppender(Writer target) {
        this.target = target;
    }

    /* (non-Javadoc)
     * @see AbstractEncodedAppender#flush()
     */
    @Override
    public void flush() throws IOException {
        target.flush();
    }

    /* (non-Javadoc)
     * @see AbstractEncodedAppender#write(EncodingState, char[], int, int)
     */
    @Override
    protected void write(EncodingState encodingState, char[] b, int off, int len) throws IOException {
        target.write(b, off, len);
    }

    /* (non-Javadoc)
     * @see AbstractEncodedAppender#write(EncodingState, java.lang.String, int, int)
     */
    @Override
    protected void write(EncodingState encodingState, String str, int off, int len) throws IOException {
        target.write(str, off, len);
    }

    /* (non-Javadoc)
     * @see AbstractEncodedAppender#appendCharSequence(EncodingState, java.lang.CharSequence, int, int)
     */
    @Override
    protected void appendCharSequence(EncodingState encodingState, CharSequence csq, int start, int end) throws IOException {
        CharSequences.writeCharSequence(target, csq, start, end);
    }

    /* (non-Javadoc)
     * @see EncodedAppender#close()
     */
    public void close() throws IOException {
        target.close();
    }

    @Override
    protected EncodingState createNewEncodingState(Encoder encoder, EncodingState encodingState) {
        return null;
    }
}
