1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/jaxws_classes/javax/xml/bind/WhiteSpaceProcessor.java Tue Mar 06 16:09:35 2012 -0800
1.3 @@ -0,0 +1,198 @@
1.4 +/*
1.5 + * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package javax.xml.bind;
1.30 +
1.31 +/**
1.32 + * Processes white space normalization.
1.33 + *
1.34 + * @since 1.0
1.35 + */
1.36 +abstract class WhiteSpaceProcessor {
1.37 +
1.38 +// benchmarking (see test/src/ReplaceTest.java in the CVS Attic)
1.39 +// showed that this code is slower than the current code.
1.40 +//
1.41 +// public static String replace(String text) {
1.42 +// final int len = text.length();
1.43 +// StringBuffer result = new StringBuffer(len);
1.44 +//
1.45 +// for (int i = 0; i < len; i++) {
1.46 +// char ch = text.charAt(i);
1.47 +// if (isWhiteSpace(ch))
1.48 +// result.append(' ');
1.49 +// else
1.50 +// result.append(ch);
1.51 +// }
1.52 +//
1.53 +// return result.toString();
1.54 +// }
1.55 +
1.56 + public static String replace(String text) {
1.57 + return replace( (CharSequence)text ).toString();
1.58 + }
1.59 +
1.60 + /**
1.61 + * @since 2.0
1.62 + */
1.63 + public static CharSequence replace(CharSequence text) {
1.64 + int i=text.length()-1;
1.65 +
1.66 + // look for the first whitespace char.
1.67 + while( i>=0 && !isWhiteSpaceExceptSpace(text.charAt(i)) )
1.68 + i--;
1.69 +
1.70 + if( i<0 )
1.71 + // no such whitespace. replace(text)==text.
1.72 + return text;
1.73 +
1.74 + // we now know that we need to modify the text.
1.75 + // allocate a char array to do it.
1.76 + StringBuilder buf = new StringBuilder(text);
1.77 +
1.78 + buf.setCharAt(i--,' ');
1.79 + for( ; i>=0; i-- )
1.80 + if( isWhiteSpaceExceptSpace(buf.charAt(i)))
1.81 + buf.setCharAt(i,' ');
1.82 +
1.83 + return new String(buf);
1.84 + }
1.85 +
1.86 + /**
1.87 + * Equivalent of {@link String#trim()}.
1.88 + * @since 2.0
1.89 + */
1.90 + public static CharSequence trim(CharSequence text) {
1.91 + int len = text.length();
1.92 + int start = 0;
1.93 +
1.94 + while( start<len && isWhiteSpace(text.charAt(start)) )
1.95 + start++;
1.96 +
1.97 + int end = len-1;
1.98 +
1.99 + while( end>start && isWhiteSpace(text.charAt(end)) )
1.100 + end--;
1.101 +
1.102 + if(start==0 && end==len-1)
1.103 + return text; // no change
1.104 + else
1.105 + return text.subSequence(start,end+1);
1.106 + }
1.107 +
1.108 + public static String collapse(String text) {
1.109 + return collapse( (CharSequence)text ).toString();
1.110 + }
1.111 +
1.112 + /**
1.113 + * This is usually the biggest processing bottleneck.
1.114 + *
1.115 + * @since 2.0
1.116 + */
1.117 + public static CharSequence collapse(CharSequence text) {
1.118 + int len = text.length();
1.119 +
1.120 + // most of the texts are already in the collapsed form.
1.121 + // so look for the first whitespace in the hope that we will
1.122 + // never see it.
1.123 + int s=0;
1.124 + while(s<len) {
1.125 + if(isWhiteSpace(text.charAt(s)))
1.126 + break;
1.127 + s++;
1.128 + }
1.129 + if(s==len)
1.130 + // the input happens to be already collapsed.
1.131 + return text;
1.132 +
1.133 + // we now know that the input contains spaces.
1.134 + // let's sit down and do the collapsing normally.
1.135 +
1.136 + StringBuilder result = new StringBuilder(len /*allocate enough size to avoid re-allocation*/ );
1.137 +
1.138 + if(s!=0) {
1.139 + for( int i=0; i<s; i++ )
1.140 + result.append(text.charAt(i));
1.141 + result.append(' ');
1.142 + }
1.143 +
1.144 + boolean inStripMode = true;
1.145 + for (int i = s+1; i < len; i++) {
1.146 + char ch = text.charAt(i);
1.147 + boolean b = isWhiteSpace(ch);
1.148 + if (inStripMode && b)
1.149 + continue; // skip this character
1.150 +
1.151 + inStripMode = b;
1.152 + if (inStripMode)
1.153 + result.append(' ');
1.154 + else
1.155 + result.append(ch);
1.156 + }
1.157 +
1.158 + // remove trailing whitespaces
1.159 + len = result.length();
1.160 + if (len > 0 && result.charAt(len - 1) == ' ')
1.161 + result.setLength(len - 1);
1.162 + // whitespaces are already collapsed,
1.163 + // so all we have to do is to remove the last one character
1.164 + // if it's a whitespace.
1.165 +
1.166 + return result;
1.167 + }
1.168 +
1.169 + /**
1.170 + * Returns true if the specified string is all whitespace.
1.171 + */
1.172 + public static final boolean isWhiteSpace(CharSequence s) {
1.173 + for( int i=s.length()-1; i>=0; i-- )
1.174 + if(!isWhiteSpace(s.charAt(i)))
1.175 + return false;
1.176 + return true;
1.177 + }
1.178 +
1.179 + /** returns true if the specified char is a white space character. */
1.180 + public static final boolean isWhiteSpace(char ch) {
1.181 + // most of the characters are non-control characters.
1.182 + // so check that first to quickly return false for most of the cases.
1.183 + if( ch>0x20 ) return false;
1.184 +
1.185 + // other than we have to do four comparisons.
1.186 + return ch == 0x9 || ch == 0xA || ch == 0xD || ch == 0x20;
1.187 + }
1.188 +
1.189 + /**
1.190 + * Returns true if the specified char is a white space character
1.191 + * but not 0x20.
1.192 + */
1.193 + protected static final boolean isWhiteSpaceExceptSpace(char ch) {
1.194 + // most of the characters are non-control characters.
1.195 + // so check that first to quickly return false for most of the cases.
1.196 + if( ch>=0x20 ) return false;
1.197 +
1.198 + // other than we have to do four comparisons.
1.199 + return ch == 0x9 || ch == 0xA || ch == 0xD;
1.200 + }
1.201 +}
