| /* |
| * Copyright (c) 2004, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.xml.bind.annotation.adapters; |
| |
| |
| |
| /** |
| * Built-in {@link XmlAdapter} to handle {@code xs:token} and its derived types. |
| * |
| * <p> |
| * This adapter removes leading and trailing whitespaces, then truncate any |
| * sequence of tab, CR, LF, and SP by a single whitespace character ' '. |
| * |
| * @author Kohsuke Kawaguchi |
| * @since 1.6, JAXB 2.0 |
| */ |
| public class CollapsedStringAdapter extends XmlAdapter<String,String> { |
| /** |
| * Removes leading and trailing whitespaces of the string |
| * given as the parameter, then truncate any |
| * sequence of tab, CR, LF, and SP by a single whitespace character ' '. |
| */ |
| public String unmarshal(String text) { |
| if(text==null) return null; // be defensive |
| |
| int len = text.length(); |
| |
| // most of the texts are already in the collapsed form. |
| // so look for the first whitespace in the hope that we will |
| // never see it. |
| int s=0; |
| while(s<len) { |
| if(isWhiteSpace(text.charAt(s))) |
| break; |
| s++; |
| } |
| if(s==len) |
| // the input happens to be already collapsed. |
| return text; |
| |
| // we now know that the input contains spaces. |
| // let's sit down and do the collapsing normally. |
| |
| StringBuilder result = new StringBuilder(len /*allocate enough size to avoid re-allocation*/ ); |
| |
| if(s!=0) { |
| for( int i=0; i<s; i++ ) |
| result.append(text.charAt(i)); |
| result.append(' '); |
| } |
| |
| boolean inStripMode = true; |
| for (int i = s+1; i < len; i++) { |
| char ch = text.charAt(i); |
| boolean b = isWhiteSpace(ch); |
| if (inStripMode && b) |
| continue; // skip this character |
| |
| inStripMode = b; |
| if (inStripMode) |
| result.append(' '); |
| else |
| result.append(ch); |
| } |
| |
| // remove trailing whitespaces |
| len = result.length(); |
| if (len > 0 && result.charAt(len - 1) == ' ') |
| result.setLength(len - 1); |
| // whitespaces are already collapsed, |
| // so all we have to do is to remove the last one character |
| // if it's a whitespace. |
| |
| return result.toString(); |
| } |
| |
| /** |
| * No-op. |
| * |
| * Just return the same string given as the parameter. |
| */ |
| public String marshal(String s) { |
| return s; |
| } |
| |
| |
| /** returns true if the specified char is a white space character. */ |
| protected static boolean isWhiteSpace(char ch) { |
| // most of the characters are non-control characters. |
| // so check that first to quickly return false for most of the cases. |
| if( ch>0x20 ) return false; |
| |
| // other than we have to do four comparisons. |
| return ch == 0x9 || ch == 0xA || ch == 0xD || ch == 0x20; |
| } |
| } |