ohair@286: /*
mkos@397:  * Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.
ohair@286:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ohair@286:  *
ohair@286:  * This code is free software; you can redistribute it and/or modify it
ohair@286:  * under the terms of the GNU General Public License version 2 only, as
ohair@286:  * published by the Free Software Foundation.  Oracle designates this
ohair@286:  * particular file as subject to the "Classpath" exception as provided
ohair@286:  * by Oracle in the LICENSE file that accompanied this code.
ohair@286:  *
ohair@286:  * This code is distributed in the hope that it will be useful, but WITHOUT
ohair@286:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ohair@286:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ohair@286:  * version 2 for more details (a copy is included in the LICENSE file that
ohair@286:  * accompanied this code).
ohair@286:  *
ohair@286:  * You should have received a copy of the GNU General Public License version
ohair@286:  * 2 along with this work; if not, write to the Free Software Foundation,
ohair@286:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ohair@286:  *
ohair@286:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@286:  * or visit www.oracle.com if you need additional information or have any
ohair@286:  * questions.
ohair@286:  */
ohair@286: 
ohair@286: package javax.xml.bind.annotation.adapters;
ohair@286: 
ohair@286: 
ohair@286: 
ohair@286: /**
ohair@286:  * {@link XmlAdapter} to handle <tt>xs:normalizedString</tt>.
ohair@286:  *
ohair@286:  * <p>
ohair@286:  * Replaces any tab, CR, and LF by a whitespace character ' ',
ohair@286:  * as specified in <a href="http://www.w3.org/TR/xmlschema-2/#rf-whiteSpace">the whitespace facet 'replace'</a>
ohair@286:  *
ohair@286:  * @author Kohsuke Kawaguchi, Martin Grebac
ohair@286:  * @since JAXB 2.0
ohair@286:  */
ohair@286: public final class NormalizedStringAdapter extends XmlAdapter<String,String> {
ohair@286:     /**
ohair@286:      * Replace any tab, CR, and LF by a whitespace character ' ',
ohair@286:      * as specified in <a href="http://www.w3.org/TR/xmlschema-2/#rf-whiteSpace">the whitespace facet 'replace'</a>
ohair@286:      */
ohair@286:     public String unmarshal(String text) {
ohair@286:         if(text==null)      return null;    // be defensive
ohair@286: 
ohair@286:         int i=text.length()-1;
ohair@286: 
ohair@286:         // look for the first whitespace char.
ohair@286:         while( i>=0 && !isWhiteSpaceExceptSpace(text.charAt(i)) )
ohair@286:             i--;
ohair@286: 
ohair@286:         if( i<0 )
ohair@286:             // no such whitespace. replace(text)==text.
ohair@286:             return text;
ohair@286: 
ohair@286:         // we now know that we need to modify the text.
ohair@286:         // allocate a char array to do it.
ohair@286:         char[] buf = text.toCharArray();
ohair@286: 
ohair@286:         buf[i--] = ' ';
ohair@286:         for( ; i>=0; i-- )
ohair@286:             if( isWhiteSpaceExceptSpace(buf[i]))
ohair@286:                 buf[i] = ' ';
ohair@286: 
ohair@286:         return new String(buf);
ohair@286:     }
ohair@286: 
ohair@286:     /**
ohair@286:      * No-op.
ohair@286:      *
ohair@286:      * Just return the same string given as the parameter.
ohair@286:      */
ohair@286:         public String marshal(String s) {
ohair@286:             return s;
ohair@286:         }
ohair@286: 
ohair@286: 
ohair@286:     /**
ohair@286:      * Returns true if the specified char is a white space character
ohair@286:      * but not 0x20.
ohair@286:      */
ohair@286:     protected static boolean isWhiteSpaceExceptSpace(char ch) {
ohair@286:         // most of the characters are non-control characters.
ohair@286:         // so check that first to quickly return false for most of the cases.
ohair@286:         if( ch>=0x20 )   return false;
ohair@286: 
ohair@286:         // other than we have to do four comparisons.
ohair@286:         return ch == 0x9 || ch == 0xA || ch == 0xD;
ohair@286:     }
ohair@286: }