Revision 8ab5e47c
Added by Andreas Müller almost 4 years ago
| cdmlib-commons/src/main/java/eu/etaxonomy/cdm/common/CdmUtils.java | ||
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/** |
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* Concatenates an array of strings using the defined separator.<BR> |
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* <code>Null</code> values are interpreted as empty strings.<BR> |
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* <code>Null</code> values and empty strings are handled as if they |
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* do not exist. So <BR><BR> |
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* |
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* concat(":", "a", "", null, "b") results in "a:b"<BR><BR>
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* |
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* If all strings are <code>null</code> then <code>null</code> is returned. |
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* @param strings |
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* @param seperator |
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* @return String |
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* |
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* @deprecated Use `String.join()` or one of the <code>org.apache.commons.lang3.StringUtils.join(..)</code> methods instead. These methods |
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* are making explicit use of the <code>StringBuffer</code> class. This method here can not be optimized by the jit, so |
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* the for each item the new String object needs to be extended to new length, which is known to be a performance penalty. |
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* @see #concat(CharSequence, String, String) |
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* @param strings the strings to concatenate |
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* @param seperator the separator for concatenation |
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* @return String the concatenation result |
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*/ |
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@Deprecated |
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static public String concat(CharSequence separator, String... strings){
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String result = "";
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StringBuffer result = new StringBuffer();
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boolean allNull = true; |
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for (String string : strings){
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if (string != null){
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if (result.length() > 0 && string.length() > 0){
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result += separator;
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result.append(separator);
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} |
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result += string;
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result.append(string);
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allNull = false; |
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} |
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} |
| ... | ... | |
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if (allNull){
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return null; |
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}else {
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return result; |
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return result.toString();
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} |
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} |
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/** |
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* Concatenates two strings, using the defined seperator.<BR> |
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* <code>Null</code> values are interpreted as empty Strings.<BR> |
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* Concatenates two strings, using the defined separator.<BR> |
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* <code>Null</code> values are interpreted as empty strings.<BR> |
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* Empty strings are not included in concatenation so concat(":", "a", "")
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* results in "a", not "a:".<BR> |
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* |
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* If both strings are <code>null</code> then <code>null</code> is returned. |
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* @see #concat(CharSequence, String[]) |
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* @param seperator |
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* @param string1 |
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* @param string2 |
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* @return String |
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* |
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* @deprecated Use `String.join()` or one of the <code>org.apache.commons.lang3.StringUtils.join(..)</code> methods instead. These methods |
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* are making explicit use of the <code>StringBuffer</code> class. This method here can not be optimized by the jit, so |
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* the for each item the new String object needs to be extended to new length, which is known to be a performance penalty. |
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* @see #concat(CharSequence, String[]) |
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* @param sepearator the separator |
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* @param string1 first string to concatenate |
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* @param string2 second string to concatenate |
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* @return String the concatenated string |
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*/ |
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@Deprecated |
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static public String concat(CharSequence separator, String string1, String string2){
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String[] strings = {string1, string2};
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return concat(separator, strings); |
Also available in: Unified diff
fix #9147 use StringBuffer in concat()