MaltChainedException.java

package org.maltparser.core.exception;

/**
 * MaltChainedException handles a chain of MaltParser specific exception.
 *
 * @author Johan Hall
*
 */
public class MaltChainedException extends Exception {

    public static final long serialVersionUID = 8045568022124816379L;
    private Throwable cause = null;

    /**
     * Creates a MaltChainedException instance
     */
    public MaltChainedException() {
        super();
    }

    /**
     * Creates a MaltChainedException instance with a message
     *
     * @param message a message string
     */
    public MaltChainedException(String message) {
        super(message);
    }

    /**
     * Creates a MaltChainedException instance with a message and keeps track of
     * the cause of the exception.
     *
     * @param message	a message string
     * @param cause	a cause
     */
    public MaltChainedException(String message, Throwable cause) {
        super(message);
        this.cause = cause;
    }

    /*
     * (non-Javadoc) @see java.lang.Throwable#getCause()
     */
    @Override
    public Throwable getCause() {
        return cause;
    }

    /**
     * Returns a string representation of the exception chain. Only MaltParser
     * specific exception is included.
     *
     * @return a string representation of the exception chain
     */
    public String getMessageChain() {
        final StringBuilder sb = new StringBuilder();
        Throwable t = this;

        while (t != null) {
            if (t.getMessage() != null && t instanceof MaltChainedException) {
                sb.append(t.getMessage()).append("\n");
            }
            t = t.getCause();
        }
        return sb.toString();
    }

    /*
     * (non-Javadoc) @see java.lang.Throwable#printStackTrace()
     */
    @Override
    public void printStackTrace() {
        super.printStackTrace();
        if (cause != null) {
            cause.printStackTrace();
        }
    }
}