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authortknall <tknall@7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c>2013-01-09 15:41:29 +0000
committertknall <tknall@7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c>2013-01-09 15:41:29 +0000
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tree0804f301c1a9ceb303a8441b7b29244fc8eb7ff0 /src/main/java/at/gv/egiz/pdfas/api/io/DataSource.java
parent1efaf6fd5619dfa95c9d7e8c71eda4c2ffba4998 (diff)
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git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/pdf-as/trunk@926 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c
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-/**
- * <copyright> Copyright 2006 by Know-Center, Graz, Austria </copyright>
- * PDF-AS has been contracted by the E-Government Innovation Center EGIZ, a
- * joint initiative of the Federal Chancellery Austria and Graz University of
- * Technology.
- *
- * 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.pdfas.api.io;
-
-import java.io.InputStream;
-
-/**
- * Input document data source.
- *
- * <p>
- * This allows the holder of the data to decide how the data is to be stored (e.g. in a File or in a byte array).
- * </p>
- *
- * @author wprinz
- *
- */
-public interface DataSource
-{
- /**
- * Creates a new InputStream that allows to read out the document's binary
- * data from the beginning.
- *
- * @return Returns the InputStream with the binary data.
- */
- public InputStream createInputStream();
-
- /**
- * Returns the length (number of bytes) of the stream.
- *
- * @return Returns the length (number of bytes) of the stream.
- */
- public int getLength();
-
- /**
- * Returns the data of this DataSource as a byte array for random read only access.
- *
- * <p>
- * Calling this method indicates that you need a byte array for random
- * <strong>read only</strong> access. The DataSource implementation should of
- * course cache this byte array to avoid too much memory usage.
- * </p>
- * <p>
- * Performance analysis has shown that the libraries internally convert the
- * streams to byte arrays and that file system access is very slow.
- * </p>
- * <p>
- * Never write to this byte array!
- * </p>
- *
- * @return Returns the data of this DataSource as a byte array for random read only access.
- */
- public byte[] getAsByteArray();
-
- /**
- * Returns the mime type of the data.
- *
- * @return Returns the mime type of the data.
- */
- public String getMimeType();
-
- /**
- * Returns the character encoding of the data.
- *
- * <p>
- * This makes only sense for character based mime types.
- * </p>
- *
- * @return Returns the character encoding of the data or null if no encoding
- * is applicable (e.g. if the data is binary).
- */
- public String getCharacterEncoding();
-
-}