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a template-like script and engine, all writen with Java.
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// Copyright (c) 2013-2014, Webit Team. All Rights Reserved.
package webit.script.io.impl;

import java.io.IOException;
import java.io.Writer;
import webit.script.Engine;
import webit.script.exceptions.ScriptRuntimeException;
import webit.script.io.Buffers;
import webit.script.io.Out;
import webit.script.io.charset.CoderFactory;
import webit.script.io.charset.Decoder;

/**
 *
 * @author Zqq
 */
public final class WriterOut implements Out {

    private final Writer writer;
    private final String encoding;
    private final Decoder decoder;
    private final Buffers buffers;

    public WriterOut(Writer writer, String encoding, Decoder decoder, Buffers buffers) {
        this.writer = writer;
        this.encoding = encoding;
        this.decoder = decoder;
        this.buffers = buffers;
    }

    public WriterOut(Writer writer, final WriterOut writerOut) {
        this(writer, writerOut.encoding, writerOut.decoder, writerOut.buffers);
    }

    public WriterOut(Writer writer, final Engine engine) {
        this(writer, engine.getEncoding(), engine.getCoderFactory());
    }

    public WriterOut(Writer writer, String encoding, CoderFactory coderFactory) {
        this.writer = writer;
        this.encoding = encoding;
        this.decoder = coderFactory.newDecoder(encoding, this.buffers = Buffers.getMiniPeers());
    }

    public void write(final byte[] bytes, final int offset, final int length) {
        try {
            this.decoder.write(bytes, offset, length, this.writer);
        } catch (IOException ex) {
            throw new ScriptRuntimeException(ex);
        }
    }

    public void write(final byte[] bytes) {
        try {
            this.decoder.write(bytes, 0, bytes.length, this.writer);
        } catch (IOException ex) {
            throw new ScriptRuntimeException(ex);
        }
    }

    public void write(final char[] chars, final int offset, final int length) {
        try {
            this.writer.write(chars, offset, length);
        } catch (IOException ex) {
            throw new ScriptRuntimeException(ex);
        }
    }

    public void write(final char[] chars) {
        try {
            this.writer.write(chars);
        } catch (IOException ex) {
            throw new ScriptRuntimeException(ex);
        }
    }

    public void write(final String string, final int offset, final int length) {
        try {
            final char[] chars;
            string.getChars(offset, offset + length,
                    chars = this.buffers.getChars(length),
                    0);
            this.writer.write(chars, 0, length);
        } catch (IOException ex) {
            throw new ScriptRuntimeException(ex);
        }
    }

    public void write(final String string) {
        write(string, 0, string.length());
    }

    public String getEncoding() {
        return this.encoding;
    }

    public boolean isByteStream() {
        return false;
    }
}