exceptionconverter.java

来自「一个java操作pdf文件的开发包,很好用的.」· Java 代码 · 共 69 行

/*
 * ExceptionConverter.java
 *
 * Created on February 5, 2002, 3:47 PM
 */

package com.lowagie.text;

/**
 * The ExceptionConverter changes a checked exception into an
 * unchecked exception.
 */
public class ExceptionConverter extends RuntimeException {
    /** we keep a handle to the wrapped exception */
    private Exception ex;

    public ExceptionConverter(Exception ex) {
        this.ex = ex;
    }

    /** and allow the user of ExceptionConverter to get a handle to it. */
    public Exception getException() {
        return ex;
    }

    /** We print the message of the checked exception */
    public String getMessage() {
        return ex.getMessage();
    }

    /** and make sure we also produce a localized version */
    public String getLocalizedMessage() {
        return ex.getLocalizedMessage();
    }

    /** The toString() is changed to be prefixed with ExceptionConverter */
    public String toString() {
        return "ExceptionConverter: " + ex;
    }

    /** we have to override this as well */
    public void printStackTrace() {
        printStackTrace(System.err);
    }

    /** here we prefix, with s.print(), not s.println(), the stack
     * trace with "ExceptionConverter:" */
    public void printStackTrace(java.io.PrintStream s) {
        synchronized (s) {
            s.print("ExceptionConverter: ");
            ex.printStackTrace(s);
        }
    }

    /** Again, we prefix the stack trace with "ExceptionConverter:" */
    public void printStackTrace(java.io.PrintWriter s) {
        synchronized (s) {
            s.print("ExceptionConverter: ");
            ex.printStackTrace(s);
        }
    }

    /** requests to fill in the stack trace we will have to ignore.
     * We can't throw an exception here, because this method
     * is called by the constructor of Throwable */
    public Throwable fillInStackTrace() {
        return this;
    }
}