jdk8-mips64-public/jaxws: src/share/jaxws_classes/javax/xml/bind/annotation/adapters/CollapsedStringAdapter.java@b0610cd08440

     1 /*

     2  * Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package javax.xml.bind.annotation.adapters;

    30 /**

    31  * Built-in {@link XmlAdapter} to handle <tt>xs:token</tt> and its derived types.

    32  *

    33  * <p>

    34  * This adapter removes leading and trailing whitespaces, then truncate any

    35  * sequnce of tab, CR, LF, and SP by a single whitespace character ' '.

    36  *

    37  * @author Kohsuke Kawaguchi

    38  * @since JAXB 2.0

    39  */

    40 public class CollapsedStringAdapter extends XmlAdapter<String,String> {

    41     /**

    42      * Removes leading and trailing whitespaces of the string

    43      * given as the parameter, then truncate any

    44      * sequnce of tab, CR, LF, and SP by a single whitespace character ' '.

    45      */

    46     public String unmarshal(String text) {

    47         if(text==null)  return null;        // be defensive

    49         int len = text.length();

    51         // most of the texts are already in the collapsed form.

    52         // so look for the first whitespace in the hope that we will

    53         // never see it.

    54         int s=0;

    55         while(s<len) {

    56             if(isWhiteSpace(text.charAt(s)))

    57                 break;

    58             s++;

    59         }

    60         if(s==len)

    61             // the input happens to be already collapsed.

    62             return text;

    64         // we now know that the input contains spaces.

    65         // let's sit down and do the collapsing normally.

    67         StringBuilder result = new StringBuilder(len /*allocate enough size to avoid re-allocation*/ );

    69         if(s!=0) {

    70             for( int i=0; i<s; i++ )

    71                 result.append(text.charAt(i));

    72             result.append(' ');

    73         }

    75         boolean inStripMode = true;

    76         for (int i = s+1; i < len; i++) {

    77             char ch = text.charAt(i);

    78             boolean b = isWhiteSpace(ch);

    79             if (inStripMode && b)

    80                 continue; // skip this character

    82             inStripMode = b;

    83             if (inStripMode)

    84                 result.append(' ');

    85             else

    86                 result.append(ch);

    87         }

    89         // remove trailing whitespaces

    90         len = result.length();

    91         if (len > 0 && result.charAt(len - 1) == ' ')

    92             result.setLength(len - 1);

    93         // whitespaces are already collapsed,

    94         // so all we have to do is to remove the last one character

    95         // if it's a whitespace.

    97         return result.toString();

    98     }

   100     /**

   101      * No-op.

   102      *

   103      * Just return the same string given as the parameter.

   104      */

   105     public String marshal(String s) {

   106         return s;

   107     }

   110     /** returns true if the specified char is a white space character. */

   111     protected static boolean isWhiteSpace(char ch) {

   112         // most of the characters are non-control characters.

   113         // so check that first to quickly return false for most of the cases.

   114         if( ch>0x20 )   return false;

   116         // other than we have to do four comparisons.

   117         return ch == 0x9 || ch == 0xA || ch == 0xD || ch == 0x20;

   118     }

   119 }

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