commons-bcel-master/src/main/java/org/apache/bcel/verifier/exc/AssertionViolatedException.java
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.apache.bcel.verifier.exc;

import java.util.Arrays;

/**
 * Instances of this class should never be thrown. When such an instance is thrown, this is due to an INTERNAL ERROR of
 * BCEL's class file verifier &quot;JustIce&quot;.
 */
public final class AssertionViolatedException extends RuntimeException {
    private static final long serialVersionUID = -129822266349567409L;

    /**
     * DO NOT USE. It's for experimental testing during development only.
     */
    public static void main(final String[] args) {
        final AssertionViolatedException ave = new AssertionViolatedException(Arrays.toString(args));
        ave.extendMessage("\nFOUND:\n\t", "\nExiting!!\n");
        throw ave;
    }

    /** The error message. */
    private String detailMessage;

    /** Constructs a new AssertionViolatedException with null as its error message string. */
    public AssertionViolatedException() {
    }

    /**
     * Constructs a new AssertionViolatedException with the specified error message preceded by &quot;INTERNAL ERROR:
     * &quot;.
     */
    public AssertionViolatedException(String message) {
        super(message = "INTERNAL ERROR: " + message); // Thanks to Java, the constructor call here must be first.
        detailMessage = message;
    }

    /**
     * Constructs a new AssertionViolationException with the specified error message and initial cause
     *
     * @since 6.0
     */
    public AssertionViolatedException(String message, final Throwable initCause) {
        super(message = "INTERNAL ERROR: " + message, initCause);
        detailMessage = message;
    }

    /**
     * Extends the error message with a string before ("pre") and after ("post") the 'old' error message. All of these three
     * strings are allowed to be null, and null is always replaced by the empty string (""). In particular, after invoking
     * this method, the error message of this object can no longer be null.
     */
    public void extendMessage(String pre, String post) {
        if (pre == null) {
            pre = "";
        }
        if (detailMessage == null) {
            detailMessage = "";
        }
        if (post == null) {
            post = "";
        }
        detailMessage = pre + detailMessage + post;
    }

    /**
     * Returns the error message string of this AssertionViolatedException object.
     *
     * @return the error message string of this AssertionViolatedException.
     */
    @Override
    public String getMessage() {
        return detailMessage;
    }

}
