aboutsummaryrefslogtreecommitdiff
path: root/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/utils/CsvUtils.java
diff options
context:
space:
mode:
Diffstat (limited to 'pdf-as-lib/src/main/java/at/gv/egiz/pdfas/utils/CsvUtils.java')
-rw-r--r--pdf-as-lib/src/main/java/at/gv/egiz/pdfas/utils/CsvUtils.java82
1 files changed, 82 insertions, 0 deletions
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/utils/CsvUtils.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/utils/CsvUtils.java
new file mode 100644
index 0000000..a78da93
--- /dev/null
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/utils/CsvUtils.java
@@ -0,0 +1,82 @@
+/**
+ * <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.utils;
+
+import org.apache.commons.lang.StringUtils;
+
+/**
+ * Methods in order to create valid delimiter separated data, where the semicolon as used as delimiter, also known as
+ * the German version of CSV.
+ *
+ * @author Datentechnik Innovation GmbH
+ * @see <a href="http://tools.ietf.org/html/rfc4180">RFC 4180</a>
+ */
+public class CsvUtils {
+
+ /**
+ * The delimiter char used instead of COMMA.
+ */
+ public static final char DEFAULT_DELIMITER = ';';
+
+ private static final char QUOTE_CHAR = '"';
+ private static final char LF_CHAR = '\n';
+ private static final char CR_CHAR = '\r';
+
+ private static final char[] SHOULD_BE_QUOTED = { LF_CHAR, CR_CHAR, DEFAULT_DELIMITER, QUOTE_CHAR };
+ private static final String CSV_QUOTE = String.valueOf(QUOTE_CHAR);
+
+ /**
+ * Returns an DSV escapted representation of the given object using the default delimiter character (
+ * {@link #DEFAULT_DELIMITER}).
+ *
+ * @param obj
+ * The object.
+ * @return An escapted representation of the given object.
+ */
+ public static String escapeCsvValue(Object obj) {
+ // null value should be printed as empty column
+ if (obj == null) {
+ return "";
+ }
+ // get String representation of object
+ String asString = String.valueOf(obj);
+ // do we need to escape anything?
+ if (StringUtils.containsNone(asString, SHOULD_BE_QUOTED)) {
+ return asString;
+ }
+
+ // RFC 4180 (7): If double-quotes are used to enclose fields, then a double-quote
+ // appearing inside a field must be escaped by preceding it with
+ // another double quote.
+ asString = StringUtils.replace(asString, CSV_QUOTE, CSV_QUOTE + CSV_QUOTE);
+
+ // RFC 4180 (6): Fields containing line breaks (CRLF), double quotes, and commas
+ // should be enclosed in double-quotes.
+ if (StringUtils.containsAny(asString, SHOULD_BE_QUOTED)) {
+ return QUOTE_CHAR + asString + QUOTE_CHAR;
+ }
+ return asString;
+ }
+
+}