Add thread-safety Javadoc

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1333397 13f79535-47bb-0310-9956-ffa450edef68

Author: sebbASF

src/main/java/org/apache/commons/codec/CharEncoding.java

@@ -47,6 +47,8 @@
  * This perhaps would best belong in the [lang] project. Even if a similar interface is defined in [lang], it is not
  * foreseen that [codec] would be made to depend on [lang].
  * 
+ * This class is immutable and thread-safe.
+ * 
  * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
  * @since 1.4
  * @version $Id$

src/main/java/org/apache/commons/codec/Charsets.java

@@ -49,6 +49,8 @@
  * This perhaps would best belong in the Commons Lang project. Even if a similar class is defined in Commons Lang, it is
  * not foreseen that Commons Codec would be made to depend on Commons Lang.
  * 
+ * This class is immutable and thread-safe.
+ * 
  * @see <a href="http://docs.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
  * @since 1.7
  * @version $Id: CharEncoding.java 1173287 2011-09-20 18:16:19Z ggregory $

src/main/java/org/apache/commons/codec/StringEncoderComparator.java

@@ -24,6 +24,8 @@
  * Soundex, Metaphone, etc. This class can come in handy if one need to sort Strings by an encoded form of a name such
  * as Soundex.
  * 
+ * This class is immutable and thread-safe.
+ * 
  * @version $Id$
  */
 public class StringEncoderComparator implements Comparator {

src/main/java/org/apache/commons/codec/binary/BinaryCodec.java

@@ -25,6 +25,8 @@
 /**
  * Converts between byte arrays and strings of "0"s and "1"s.
  * 
+ * This class is immutable and thread-safe.
+ * 
  * TODO: may want to add more bit vector functions like and/or/xor/nand 
  * TODO: also might be good to generate boolean[] from byte[] et cetera.
  * 

src/main/java/org/apache/commons/codec/binary/Hex.java

@@ -31,6 +31,8 @@
  * Converts hexadecimal Strings. The charset used for certain operation can be set, the default is set in
  * {@link #DEFAULT_CHARSET_NAME}
  * 
+ * This class is thread-safe.
+ * 
  * @since 1.1
  * @version $Id$
  */

src/main/java/org/apache/commons/codec/binary/StringUtils.java

@@ -27,6 +27,8 @@
  * Converts String to and from bytes using the encodings required by the Java specification. These encodings are specified in <a
  * href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
  * 
+ * This class is immutable and thread-safe.
+ *
  * @see CharEncoding
  * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
  * @version $Id$

src/main/java/org/apache/commons/codec/digest/B64.java

@@ -23,6 +23,8 @@
  * 
  * TODO: Can Base64 be reused?
  * 
+ * This class is immutable and thread-safe.
+ * 
  * @version $Id$
  * @since 1.7
  */

src/main/java/org/apache/commons/codec/digest/Crypt.java

@@ -23,6 +23,8 @@
  * 
  * See {@link #crypt(String, String)} for further details.
  * 
+ * This class is immutable and thread-safe.
+ * 
  * @version $Id$
  * @since 1.7
  */

src/main/java/org/apache/commons/codec/digest/Md5Crypt.java

@@ -39,6 +39,8 @@
  * The C style comments are from the original C code, the ones with "//" from the port.
  * </p>
  * 
+ * This class is immutable and thread-safe.
+ * 
  * @version $Id$
  * @since 1.7
  */

src/main/java/org/apache/commons/codec/digest/Sha2Crypt.java

@@ -34,6 +34,8 @@
  * into the Public Domain.
  * </p>
  * 
+ * This class is immutable and thread-safe.
+ * 
  * @version $Id$
  * @since 1.7
  */