pdf-as-lib maven project files moved to pdf-as-lib

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/pdf-as/trunk@926 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c

1 files changed, 0 insertions, 572 deletions

diff --git a/src/main/java/at/knowcenter/wag/egov/egiz/pdf/Placeholder.java b/src/main/java/at/knowcenter/wag/egov/egiz/pdf/Placeholder.java
deleted file mode 100644
index 9249985..0000000
--- a/src/main/java/at/knowcenter/wag/egov/egiz/pdf/Placeholder.java
+++ /dev/null
@@ -1,572 +0,0 @@
-/**

- * <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.

- *

- * $Id: Placeholder.java,v 1.5 2006/10/31 08:17:50 wprinz Exp $

- */

-package at.knowcenter.wag.egov.egiz.pdf;

-

-import java.io.ByteArrayOutputStream;

-import java.io.IOException;

-import java.io.UnsupportedEncodingException;

-import java.util.ArrayList;

-import java.util.Iterator;

-import java.util.List;

-

-import javax.sound.midi.SysexMessage;

-

-import org.apache.commons.codec.net.URLCodec;

-import org.apache.log4j.Logger;

-

-import at.knowcenter.wag.egov.egiz.cfg.ConfigLogger;

-import at.knowcenter.wag.egov.egiz.exceptions.PDFDocumentException;

-import at.knowcenter.wag.egov.egiz.exceptions.PlaceholderException;

-import at.knowcenter.wag.exactparser.ByteArrayUtils;

-

-/**

- * Helper class that provides functionality for dealing with placeholders and

- * replacements in pdf.

- * 

- * @author wprinz

- */

-public abstract class Placeholder

-{

-  /**

-   * The logger definition.

-   */

-  private static final Logger logger_ = ConfigLogger.getLogger(Placeholder.class);

-

-  /**

-   * Escapes the String to be a suitable Literal String..

-   * 

-   * @param data

-   *          The String to be escaped.

-   * @return Returns the escaped PDF String.

-   */

-  public static byte[] escapePDFString(byte[] data)

-  {

-    try

-    {

-      ByteArrayOutputStream baos = new ByteArrayOutputStream();

-      for (int i = 0; i < data.length; i++)

-      {

-        byte[] escaped_bytes = escapeByte(data[i]);

-        baos.write(escaped_bytes);

-      }

-      return baos.toByteArray();

-    }

-    catch (IOException e)

-    {

-      logger_.error(e.getMessage(), e);

-      return null;

-    }

-  }

-

-  /**

-   * Unescapes the PDF String.

-   * 

-   * @param data

-   *          The escaped String.

-   * @return Returns the unescaped String.

-   */

-  public static byte[] unescapePDFString(byte[] data)

-  {

-    ByteArrayOutputStream baos = new ByteArrayOutputStream();

-    for (int i = 0; i < data.length; i++)

-    {

-      if (data[i] == '\\' && data[i + 1] == '\\')

-      {

-        baos.write('\\');

-        i++;

-        continue;

-      }

-      if (data[i] == '\\' && data[i + 1] == '(')

-

-      {

-        baos.write('(');

-        i++;

-        continue;

-      }

-      if (data[i] == '\\' && data[i + 1] == ')')

-      {

-        baos.write(')');

-        i++;

-        continue;

-      }

-      baos.write(data[i]);

-    }

-    return baos.toByteArray();

-  }

-

-  /**

-   * Reconstructs the string from a partition of placeholders.

-   * 

-   * @param pdf

-   *          The PDF to read the string from.

-   * @param sis

-   *          The list of StringInfo objects that specify the bytes of the

-   *          string in the pdf.

-   * @return Returns the extracted and reconverted string.

-   * @throws IOException

-   *           Forwarded exception.

-   */

-  public static String reconstructStringFromPartition(byte[] pdf, List sis,

-      byte[] enc) throws IOException

-  {

-    ByteArrayOutputStream baos = new ByteArrayOutputStream();

-

-    Iterator it = sis.iterator();

-    while (it.hasNext())

-    {

-      StringInfo si = (StringInfo) it.next();

-

-      for (int i = si.string_start; i < si.string_start + si.string_length; i++)

-      {

-        if (pdf[i] != 0)

-        {

-          baos.write(pdf[i]);

-        }

-      }

-    }

-

-    baos.close();

-    byte[] bytes = baos.toByteArray();

-

-    byte[] unescaped_bytes = unescapePDFString(bytes);

-

-    if (!ByteArrayUtils.compareByteArrays(enc, 0, BinarySignature.ENCODING_WIN) && !ByteArrayUtils.compareByteArrays(enc, 0, BinarySignature.ENCODING_URL))

-    {

-      String enc_str = new String(enc, "US-ASCII");

-      logger_.warn("The encoding " + enc_str + " is not known by this application - trying to proceed anyways.");

-    }

-

-    String text = new String(unescaped_bytes, "windows-1252");

-

-    String str = text;

-    if (ByteArrayUtils.compareByteArrays(enc, 0, BinarySignature.ENCODING_URL))

-    {

-      str = unapplyURLEncoding(str);

-    }

-

-    return str;

-  }

-

-  /**

-   * Prepares the given String to a byte array that can be substituted into the

-   * placeholder.

-   * 

-   * @param text

-   *          The text to be prepared for substitution.

-   * @return Returns the prepared byte array.

-   */

-  public static byte[] applyWinAnsiEncoding(String text)

-  {

-    // text = text.replace("\\", "\\\\");

-    // text = text.replace("(", "\\(");

-    // text = text.replace(")", "\\)");

-

-    byte[] replace_bytes;

-    try

-    {

-      replace_bytes = text.getBytes("windows-1252");// CP1252 = WinAnsiEncoding

-

-      // test the opposite way:

-      // String restored_string = new String (replace_bytes, "windows-1252");

-      // if (!restored_string.equals(text))

-      // {

-      // String url_encoded = URLEncoder.encode(text);

-      // replace_bytes = url_encoded.getBytes("windows-1252");

-      // }

-    }

-    catch (UnsupportedEncodingException e)

-    {

-      logger_.error(e.getMessage(), e);

-      return null;

-    }

-    return replace_bytes;

-  }

-

-  /**

-   * Unapplies the WinAnsi encoding.

-   * 

-   * @param replace_bytes

-   *          The bytes.

-   * @return Returns the decoded String.

-   */

-  public static String unapplyWinAnsiEncoding(byte[] replace_bytes)

-  {

-    try

-    {

-      String text = new String(replace_bytes, "windows-1252");

-

-      return text;

-    }

-    catch (UnsupportedEncodingException e)

-    {

-      logger_.error(e.getMessage(), e);

-      return null;

-    }

-

-  }

-

-  /**

-   * Applies the URL encoding to the text.

-   * 

-   * @param text

-   *          The text

-   * @return Returns the URL and WinAnsi encoded text.

-   */

-  public static byte[] applyURLEncoding(String text)

-  {

-    URLCodec utf8_url_codec = new URLCodec("UTF-8");

-    String url_encoded = null;

-    try

-    {

-      url_encoded = utf8_url_codec.encode(text, "UTF-8");

-    }

-    catch (UnsupportedEncodingException e)

-    {

-      throw new RuntimeException("Couldn't url encode : " + text, e);

-    }

-    // String url_encoded = URLEncoder.encode(text);

-    return applyWinAnsiEncoding(url_encoded);

-  }

-

-  /**

-   * Unapplies the WinAnsi and URL encoding.

-   * 

-   * @param winansi_str

-   *          The Winansi and URL text.

-   * @return Returns the decoded text.

-   */

-  public static String unapplyURLEncoding(String winansi_str)

-  {

-    URLCodec utf8_url_codec = new URLCodec("UTF-8");

-    String url_decoded = null;

-    try

-    {

-      url_decoded = utf8_url_codec.decode(winansi_str, "UTF-8");

-    }

-    catch (Exception e)

-    {

-      throw new RuntimeException("Couldn't url decode : " + winansi_str, e);

-    }

-    // String url_decoded = URLDecoder.decode(winansi_str);

-    return url_decoded;

-  }

-

-  /**

-   * Restores the String from a previously prepared byte array.

-   * 

-   * @param pdf_string

-   *          The byte array.

-   * @return Returns the unprepared String.

-   */

-  public static String unprepareAndUnescapeString(byte[] pdf_string)

-  {

-    try

-    {

-      String text = new String(pdf_string, "windows-1252");

-

-      // This makes problems when "+" appears.

-      // if (isURLEncoded(text))

-      // {

-      // text = URLDecoder.decode(text);

-      // }

-

-//      text = text.replace("\\)", ")");

-//      text = text.replace("\\(", "(");

-//      text = text.replace("\\\\", "\\");

-      

-      // TODO: replace jdk1.5-code with jdf1.4-code (should be tested)

-      /* */

-      text = text.replaceAll("\\\\\\)", ")");

-      text = text.replaceAll("\\\\\\(", "(");

-      text = text.replaceAll("\\\\\\\\", "\\\\");

-      

-

-      return text;

-    }

-    catch (UnsupportedEncodingException e)

-    {

-      logger_.error(e.getMessage(), e);

-      return null;

-    }

-  }

-

-  /**

-   * Checks the presence of typical URL encoded characters to tell if the string

-   * is URL encoded.

-   * 

-   * <p>

-   * This heuristic checks if there are any non URL encoded characters in the

-   * String, like ASCII control characters, which aren't allowed in the

-   * URLEncoding characterset.

-   * </p>

-   * 

-   * @param text

-   *          The text under suspicion.

-   * @return Returns true if the String is URL encoded, false otherwise.

-   */

-  protected static boolean isURLEncoded(String text)

-  {

-    if (text.indexOf(' ') >= 0)

-    {

-      return false;

-    }

-    for (int i = 0; i < text.length(); i++)

-    {

-      char c = text.charAt(i);

-      if (0x00 <= c && c <= 0x1f)

-      {

-        return false;

-      }

-      if (c == 0x7F)

-      {

-        return false;

-      }

-      if (0x80 <= c)

-      {

-        return false;

-      }

-    }

-    return true;

-  }

-

-  /**

-   * Tells, if a break can occur behind the given character.

-   * 

-   * @param character

-   *          The character.

-   * @return Returns true, if a break may occur behind the character, false

-   *         otherwise.

-   */

-  protected static boolean canBreakAfter(byte character)

-  {

-     return (character == ' ' || character == '.' || character == ',' || character == ';' || character == '-' || character == '\n') ;

-  }

-

-  /**

-   * Scans the given PDF content stream for literal PDF strings.

-   * 

-   * @param pdf

-   *          The PDF.

-   * @param stream_start

-   *          The start of the content stream to be scanned.

-   * @param stream_next

-   *          The end of the content stream.

-   * @return Returns a list of StringInfo objects specifying the strings that

-   *         could be found.

-   */

-  public static List parseStrings(byte[] pdf, int stream_start, int stream_next)

-  {

-    List strings = new ArrayList();

-    StringInfo cur_string = null;

-    for (int i = stream_start; i < stream_next; i++)

-    {

-      byte cur_byte = pdf[i];

-

-      if (cur_byte == '(' && pdf[i - 1] != '\\')

-      {

-        cur_string = new StringInfo();

-        cur_string.pdf = pdf;

-        cur_string.string_start = i + 1;

-        cur_string.string_length = -1;

-        // logger_.debug("String start = " + cur_string.string_start);

-        continue;

-      }

-      if (cur_byte == ')' && pdf[i - 1] != '\\')

-      {

-        cur_string.string_length = i - cur_string.string_start;

-        // logger_.debug("String length = " + cur_string.string_length);

-        strings.add(cur_string);

-

-        cur_string = null;

-        continue;

-      }

-    }

-

-    return strings;

-  }

-

-  /**

-   * Escapes the data byte if necessary.

-   * 

-   * <p>

-   * Before bytes can be written into the pdf Strings, they have to be escaped.

-   * Special care has to be taken that escaped sequences are not split due to

-   * line breaks. This could have fatal consequences and usually renders the

-   * whole document invalid.

-   * </p>

-   * 

-   * @param data

-   *          The data byte to be escaped.

-   * @return Returns a new byte array escaping the data byte. If the byte needs

-   *         not to be escaped, this new array will contain only the original

-   *         data byte.

-   */

-  public static byte[] escapeByte(byte data)

-  {

-    if (data == '\\')

-    {

-      return new byte[] { '\\', '\\' };

-    }

-    if (data == '(')

-    {

-      return new byte[] { '\\', '(' };

-    }

-    if (data == ')')

-    {

-      return new byte[] { '\\', ')' };

-    }

-    return new byte[] { data };

-  }

-

-  /**

-   * Replaces the placeholder with the given String breaking lines with a given

-   * tolerance.

-   * 

-   * @param pdf

-   *          The PDF.

-   * @param sis

-   *          The list of StringInfo objects describing the positions where the

-   *          String should be filled in.

-   * @param replace_bytes

-   *          The unescaped bytes to be filled in. Escaping is performed by this

-   *          method.

-   * @param tolerance

-   *          The tolerance for line wrapping. The tolerance counts from the end

-   *          of a StringInfo backwards to its start. If a word that starts

-   *          within the tolerance doesn't fit, it is wrapped into the next

-   *          line.

-   * @throws PDFDocumentException

-   *           Forwarded exception.

-   */

-  public static void replacePlaceholderWithTolerance(byte[] pdf, List sis,

-      byte[] replace_bytes, int tolerance) throws PDFDocumentException

-  {

-    try

-    {

-      // String rep_str = new String(replace_bytes);

-

-      SplitStrings ss = new SplitStrings(pdf, sis);

-

-      int read_index = 0;

-      while (read_index < replace_bytes.length)

-      {

-        if (!ss.isValidLine())

-        {

-          break;

-        }

-

-        byte[] token = readToken(replace_bytes, read_index);

-        // String token_str = new String(token);

-        byte[] escaped_token = escapeToken(token);

-

-        if (ss.fits(escaped_token))

-        {

-          ss.write(escaped_token);

-          read_index += token.length;

-          continue;

-        }

-        else

-        {

-          if (ss.getAvailable() < tolerance)

-          {

-            ss.newline();

-            continue;

-          }

-          else

-          {

-            // break the token

-            for (; read_index < replace_bytes.length; read_index++)

-            {

-              byte data = replace_bytes[read_index];

-

-              byte[] escaped_data = escapeByte(data);

-

-              if (ss.fits(escaped_data))

-              {

-                ss.write(escaped_data);

-              }

-              else

-              {

-                ss.newline();

-                break;

-              }

-            }

-            continue;

-

-          }

-        }

-      }

-      ss.fillRest();

-

-      if (read_index < replace_bytes.length)

-      {

-        logger_.error("The replace string was longer than the reserved placeholder.");

-        throw new PlaceholderException(null, replace_bytes.length - read_index);

-      }

-

-    }

-    catch (IOException e)

-    {

-      throw new PDFDocumentException(201, e);

-    }

-

-  }

-

-  protected static byte[] readToken(byte[] bytes, int index)

-  {

-    ByteArrayOutputStream baos = new ByteArrayOutputStream();

-    for (; index < bytes.length; index++)

-    {

-      byte data = bytes[index];

-

-     

-      // byte [] escaped_data = escapeByte(data);

-      baos.write(data);

-

-      if (canBreakAfter(data))

-      {

-        break;

-      }

-    }

-

-    return baos.toByteArray();

-  }

-

-

-

-protected static byte[] escapeToken(byte[] token) throws IOException

-  {

-    ByteArrayOutputStream baos = new ByteArrayOutputStream();

-

-    for (int i = 0; i < token.length; i++)

-    {

-      byte[] escaped_data = escapeByte(token[i]);

-      baos.write(escaped_data);

-    }

-

-    return baos.toByteArray();

-  }

-}