org.jbpm.designer.util.Base64Backport.java Source code

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Here is the source code for org.jbpm.designer.util.Base64Backport.java

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/*
 * Copyright 2015 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * 
 *      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.jbpm.designer.util;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.StringUtils;

/**
 * Backports the commons-codec isBase64(String) method from commons-codec 1.5
 * because EAP requires us to use commons-codec 1.4.
 */
// TODO Remove this class when we upgrade to commons-codec 1.5.
public class Base64Backport extends Base64 {

    public static boolean isBase64(final String base64) {
        return base64 == null ? false : isBase64(StringUtils.getBytesUtf8(base64));
    }

    private static boolean isBase64(final byte[] arrayOctet) {
        for (int i = 0; i < arrayOctet.length; i++) {
            if (!isBase64(arrayOctet[i]) && !isWhiteSpace(arrayOctet[i])) {
                return false;
            }
        }
        return true;
    }

    private static boolean isWhiteSpace(byte byteToCheck) {
        switch (byteToCheck) {
        case ' ':
        case '\n':
        case '\r':
        case '\t':
            return true;
        default:
            return false;
        }
    }

}