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package jodd.io;
import java.io.Closeable;
import java.io.Flushable;
import java.io.IOException;
import java.io.Writer;
import java.nio.CharBuffer;
/**
* Appendable writer adapter.
*/
public class AppendableWriter extends Writer {
private final Appendable appendable;
private final boolean flushable;
private boolean closed;
public AppendableWriter(final Appendable appendable) {
this.appendable = appendable;
this.flushable = appendable instanceof Flushable;
this.closed = false;
}
@Override
public void write(final char[] cbuf, final int off, final int len) throws IOException {
checkNotClosed();
appendable.append(CharBuffer.wrap(cbuf), off, off + len);
}
@Override
public void write(final int c) throws IOException {
checkNotClosed();
appendable.append((char) c);
}
@Override
public Writer append(final char c) throws IOException {
checkNotClosed();
appendable.append(c);
return this;
}
@Override
public Writer append(final CharSequence csq, final int start, final int end) throws IOException {
checkNotClosed();
appendable.append(csq, start, end);
return this;
}
@Override
public Writer append(final CharSequence csq) throws IOException {
checkNotClosed();
appendable.append(csq);
return this;
}
@Override
public void write(final String str, final int off, final int len) throws IOException {
checkNotClosed();
appendable.append(str, off, off + len);
}
@Override
public void write(final String str) throws IOException {
appendable.append(str);
}
@Override
public void write(final char[] cbuf) throws IOException {
appendable.append(CharBuffer.wrap(cbuf));
}
@Override
public void flush() throws IOException {
checkNotClosed();
if (flushable) {
((Flushable) appendable).flush();
}
}
private void checkNotClosed() throws IOException {
if (closed) {
throw new IOException("Cannot write to closed writer " + this);
}
}
@Override
public void close() throws IOException {
if (!closed) {
flush();
if (appendable instanceof Closeable) {
((Closeable) appendable).close();
}
closed = true;
}
}
}