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Hibernate's entity version (audit/history) support
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.envers.internal.tools;
import java.util.Iterator;
import java.util.Locale;
/**
* @author Adam Warski (adam at warski dot org)
* @author Lukasz Zuchowski (author at zuchos dot com)
*/
public abstract class StringTools {
public static boolean isEmpty(String s) {
return s == null || s.isEmpty();
}
public static boolean isEmpty(Object o) {
return o == null || "".equals( o );
}
/**
* @param s String, from which to get the last component.
*
* @return The last component of the dot-separated string s. For example, for a string
* "a.b.c", the result is "c".
*/
public static String getLastComponent(String s) {
if ( s == null ) {
return null;
}
final int lastDot = s.lastIndexOf( '.' );
if ( lastDot == -1 ) {
return s;
}
else {
return s.substring( lastDot + 1 );
}
}
/**
* To the given string builder, appends all strings in the given iterator, separating them with the given
* separator. For example, for an interator "a" "b" "c" and separator ":" the output is "a:b:c".
*
* @param sb String builder, to which to append.
* @param contents Strings to be appended.
* @param separator Separator between subsequent content.
*/
public static void append(StringBuilder sb, Iterator contents, String separator) {
boolean isFirst = true;
while ( contents.hasNext() ) {
if ( !isFirst ) {
sb.append( separator );
}
sb.append( contents.next() );
isFirst = false;
}
}
/**
* Capitalizes first letter of the string
*
* @param fieldName field name
*
* @return capitalized string
*/
public static String capitalizeFirst(String fieldName) {
return fieldName.substring( 0, 1 ).toUpperCase( Locale.ROOT ) + fieldName.substring( 1 );
}
}