GifIOException.java

package pl.droidsonroids.gif;

import android.support.annotation.NonNull;

import java.io.IOException;

/**
 * Exception encapsulating {@link GifError}s.
 *
 * @author koral--
 */
public class GifIOException extends IOException {
	private static final long serialVersionUID = 13038402904505L;
	/**
	 * Reason which caused an exception
	 */
	@NonNull
	public final GifError reason;

	private final String mErrnoMessage;

	@Override
	public String getMessage() {
		if (mErrnoMessage == null) {
			return reason.getFormattedDescription();
		}
		return reason.getFormattedDescription() + ": " + mErrnoMessage;
	}

	private GifIOException(int errorCode, String errnoMessage) {
		reason = GifError.fromCode(errorCode);
		mErrnoMessage = errnoMessage;
	}

	static GifIOException fromCode(final int nativeErrorCode) {
		if (nativeErrorCode == GifError.NO_ERROR.errorCode) {
			return null;
		}
		return new GifIOException(nativeErrorCode, null);
	}
}