at.gv.egiz.bku.slcommands.impl.cms.ReferencedHashDataInput.java Source code

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Here is the source code for at.gv.egiz.bku.slcommands.impl.cms.ReferencedHashDataInput.java

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/*
 * Copyright 2015 Datentechnik Innovation GmbH and Prime Sign GmbH, Austria
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */

package at.gv.egiz.bku.slcommands.impl.cms;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.ArrayUtils;

import at.buergerkarte.namespaces.securitylayer._1_2_3.ExcludedByteRangeType;
import at.gv.egiz.bku.utils.urldereferencer.URLDereferencer;

public class ReferencedHashDataInput extends CMSHashDataInput {

    private String urlReference;
    private URLDereferencer urlDereferencer;
    private ExcludedByteRangeType excludedByteRange;

    public ReferencedHashDataInput(String mimeType, URLDereferencer urlDereferencer, String urlReference,
            ExcludedByteRangeType excludedByteRange) {
        super(null, mimeType);
        this.urlDereferencer = urlDereferencer;
        this.urlReference = urlReference;
        this.excludedByteRange = excludedByteRange;
    }

    public URLDereferencer getUrlDereferencer() {
        return urlDereferencer;
    }

    public void setUrlDereferencer(URLDereferencer urlDereferencer) {
        this.urlDereferencer = urlDereferencer;
    }

    public InputStream getHashDataInput() throws IOException {

        InputStream hashDataInputStream = urlDereferencer.dereference(urlReference).getStream();

        try {
            byte[] content = IOUtils.toByteArray(hashDataInputStream);

            if (excludedByteRange != null) {

                int from = excludedByteRange.getFrom().intValue();
                int to = excludedByteRange.getTo().intValue();

                byte[] signedContent = ArrayUtils.addAll(ArrayUtils.subarray(content, 0, from),
                        ArrayUtils.subarray(content, to, content.length));

                return new ByteArrayInputStream(signedContent);

            } else {
                return new ByteArrayInputStream(content);
            }

        } finally {
            hashDataInputStream.close();
        }
    }
}