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jCardSim is open-source library contains implementation of Java Card API

There is a newer version: 3.0.6.0

/*
 * Copyright 2015 Licel Corporation.
 *
 * Licensed 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 com.licel.jcardsim.framework;

/**
 * ProxyClass for CardException
 * @see javacard.framework.CardException
 */
public class CardExceptionProxy extends Exception {

    private short reason;

    /**
     * Construct a CardException instance with the specified reason.
     * To conserve on resources, use the throwIt() method
     * to use the Java Card runtime environment-owned instance of this class.
     * @param reason the reason for the exception
     */
    public CardExceptionProxy(short reason) {
        this.reason = reason;
    }

    /**
     * Get reason code
     * @return the reason for the exception
     */
    public short getReason() {
        return reason;
    }

    /**
     * Set reason code
     * @param reason the reason for the exception
     */
    public void setReason(short reason) {
        this.reason = reason;
    }

    /**
     * Throw the Java Card runtime environment-owned instance of CardException class with the
     * specified reason.
     * Java Card runtime environment-owned instances of exception classes are temporary Java Card runtime environment Entry Point Objects
     * and can be accessed from any applet context. References to these temporary objects
     * cannot be stored in class variables or instance variables or array components.
     * See Runtime Environment Specification for the Java Card Platform, section 6.2.1 for details.
     * @param reason  the reason for the exception
     * @throws CardExceptionProxy always
     */
    public static void throwIt(short reason)
            throws CardExceptionProxy {
        throw new CardExceptionProxy(reason);
    }
}