acscommons.io.jsonwebtoken.io.ExceptionPropagatingDecoder Maven / Gradle / Ivy

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Core ACS AEM Commons OSGi Bundle. Includes commons utilities.

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/*
 * Copyright (C) 2014 jsonwebtoken.io
 *
 * 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 acscommons.io.jsonwebtoken.io;

import acscommons.io.jsonwebtoken.lang.Assert;

/**
 * @since 0.10.0
 */
class ExceptionPropagatingDecoder implements Decoder {

    private final Decoder decoder;

    ExceptionPropagatingDecoder(Decoder decoder) {
        Assert.notNull(decoder, "Decoder cannot be null.");
        this.decoder = decoder;
    }

    @Override
    public R decode(T t) throws DecodingException {
        Assert.notNull(t, "Decode argument cannot be null.");
        try {
            return decoder.decode(t);
        } catch (DecodingException e) {
            throw e; //propagate
        } catch (Exception e) {
            String msg = "Unable to decode input: " + e.getMessage();
            throw new DecodingException(msg, e);
        }
    }
}