src/org/simalliance/openmobileapi/service/security/ApduFilter.java

/*
 * Copyright 2012 Giesecke & Devrient GmbH.
 * 
 * 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 org.simalliance.openmobileapi.service.security;

import org.simalliance.openmobileapi.service.Util;


public class ApduFilter {

    protected byte[] mApdu;

    protected byte[] mMask;

    public static final int LENGTH = 8;

    protected ApduFilter() {
    	
    }

    public ApduFilter(byte[] apdu, byte[] mask) {
        if (apdu.length != 4) {
            throw new IllegalArgumentException("apdu length must be 4 bytes");
        }
        if (mask.length != 4) {
            throw new IllegalArgumentException("mask length must be 4 bytes");
        }

        mApdu = apdu;
        mMask = mask;
    }
    
    public ApduFilter clone() {
    	ApduFilter apduFilter = new ApduFilter();
    	apduFilter.setApdu(mApdu.clone());
    	apduFilter.setMask(mMask.clone());
    	
    	return apduFilter;
    }

    public ApduFilter(byte[] apduAndMask) {
        if (apduAndMask.length != 8) {
            throw new IllegalArgumentException("filter length must be 8 bytes");
        }

        mApdu = Util.getMid(apduAndMask, 0, 4);
        mMask = Util.getMid(apduAndMask, 4, 4);
    }

    public byte[] getApdu() {
        return mApdu;
    }

    public void setApdu(byte[] apdu) {
        if (apdu.length != 4) {
            throw new IllegalArgumentException("apdu length must be 4 bytes");
        }
        mApdu = apdu;
    }

    public byte[] getMask() {
        return mMask;
    }

    public void setMask(byte[] mask) {
        if (mask.length != 4) {
            throw new IllegalArgumentException("mask length must be 4 bytes");
        }
        mMask = mask;
    }

    public byte[] toBytes() {
        return Util.mergeBytes(mApdu, mMask);
    }

    @Override
    public String toString() {
        return "APDU Filter [apdu=" + Util.bytesToString(mApdu) + ", mask="
                + Util.bytesToString(mMask) + "]";
    }

    public int getLength() {
        return 8;
    }

}