+++ /dev/null
-package net.sourceforge.phpdt.internal.ui.util;
-
-import java.util.Vector;
-
-
-/**
- * A string pattern matcher, suppporting * and ? wildcards.
- */
-public class StringMatcher {
- protected String fPattern;
- protected int fLength; // pattern length
- protected boolean fIgnoreWildCards;
- protected boolean fIgnoreCase;
- protected boolean fHasLeadingStar;
- protected boolean fHasTrailingStar;
- protected String fSegments[]; //the given pattern is split into * separated segments
-
- /* boundary value beyond which we don't need to search in the text */
- protected int fBound= 0;
-
-
- protected static final char fSingleWildCard= '\u0000';
-
- public static class Position {
- int start; //inclusive
- int end; //exclusive
- public Position(int start, int end) {
- this.start= start;
- this.end= end;
- }
- public int getStart() {
- return start;
- }
- public int getEnd() {
- return end;
- }
- }
- /**
- * StringMatcher constructor takes in a String object that is a simple
- * pattern which may contain * for 0 and many characters and
- * ? for exactly one character.
- *
- * Literal '*' and '?' characters must be escaped in the pattern
- * e.g., "\*" means literal "*", etc.
- *
- * Escaping any other character (including the escape character itself),
- * just results in that character in the pattern.
- * e.g., "\a" means "a" and "\\" means "\"
- *
- * If invoking the StringMatcher with string literals in Java, don't forget
- * escape characters are represented by "\\".
- *
- * @param pattern the pattern to match text against
- * @param ignoreCase if true, case is ignored
- * @param ignoreWildCards if true, wild cards and their escape sequences are ignored
- * (everything is taken literally).
- */
- public StringMatcher(String pattern, boolean ignoreCase, boolean ignoreWildCards) {
- if (pattern == null)
- throw new IllegalArgumentException();
- fIgnoreCase= ignoreCase;
- fIgnoreWildCards= ignoreWildCards;
- fPattern= pattern;
- fLength= pattern.length();
-
- if (fIgnoreWildCards) {
- parseNoWildCards();
- } else {
- parseWildCards();
- }
- }
- /**
- * Find the first occurrence of the pattern between <code>start</code)(inclusive)
- * and <code>end</code>(exclusive).
- * @param <code>text</code>, the String object to search in
- * @param <code>start</code>, the starting index of the search range, inclusive
- * @param <code>end</code>, the ending index of the search range, exclusive
- * @return an <code>StringMatcher.Position</code> object that keeps the starting
- * (inclusive) and ending positions (exclusive) of the first occurrence of the
- * pattern in the specified range of the text; return null if not found or subtext
- * is empty (start==end). A pair of zeros is returned if pattern is empty string
- * Note that for pattern like "*abc*" with leading and trailing stars, position of "abc"
- * is returned. For a pattern like"*??*" in text "abcdf", (1,3) is returned
- */
- public StringMatcher.Position find(String text, int start, int end) {
- if (text == null)
- throw new IllegalArgumentException();
-
- int tlen= text.length();
- if (start < 0)
- start= 0;
- if (end > tlen)
- end= tlen;
- if (end < 0 ||start >= end )
- return null;
- if (fLength == 0)
- return new Position(start, start);
- if (fIgnoreWildCards) {
- int x= posIn(text, start, end);
- if (x < 0)
- return null;
- return new Position(x, x+fLength);
- }
-
- int segCount= fSegments.length;
- if (segCount == 0)//pattern contains only '*'(s)
- return new Position (start, end);
-
- int curPos= start;
- int matchStart= -1;
- int i;
- for (i= 0; i < segCount && curPos < end; ++i) {
- String current= fSegments[i];
- int nextMatch= regExpPosIn(text, curPos, end, current);
- if (nextMatch < 0 )
- return null;
- if(i == 0)
- matchStart= nextMatch;
- curPos= nextMatch + current.length();
- }
- if (i < segCount)
- return null;
- return new Position(matchStart, curPos);
- }
- /**
- * match the given <code>text</code> with the pattern
- * @return true if matched eitherwise false
- * @param <code>text</code>, a String object
- */
- public boolean match(String text) {
- return match(text, 0, text.length());
- }
- /**
- * Given the starting (inclusive) and the ending (exclusive) positions in the
- * <code>text</code>, determine if the given substring matches with aPattern
- * @return true if the specified portion of the text matches the pattern
- * @param String <code>text</code>, a String object that contains the substring to match
- * @param int <code>start<code> marks the starting position (inclusive) of the substring
- * @param int <code>end<code> marks the ending index (exclusive) of the substring
- */
- public boolean match(String text, int start, int end) {
- if (null == text)
- throw new IllegalArgumentException();
-
- if (start > end)
- return false;
-
- if (fIgnoreWildCards)
- return (end - start == fLength) && fPattern.regionMatches(fIgnoreCase, 0, text, start, fLength);
- int segCount= fSegments.length;
- if (segCount == 0 && (fHasLeadingStar || fHasTrailingStar)) // pattern contains only '*'(s)
- return true;
- if (start == end)
- return fLength == 0;
- if (fLength == 0)
- return start == end;
-
- int tlen= text.length();
- if (start < 0)
- start= 0;
- if (end > tlen)
- end= tlen;
-
- int tCurPos= start;
- int bound= end - fBound;
- if ( bound < 0)
- return false;
- int i=0;
- String current= fSegments[i];
- int segLength= current.length();
-
- /* process first segment */
- if (!fHasLeadingStar){
- if(!regExpRegionMatches(text, start, current, 0, segLength)) {
- return false;
- } else {
- ++i;
- tCurPos= tCurPos + segLength;
- }
- }
-
- /* process middle segments */
- while (i < segCount) {
- current= fSegments[i];
- int currentMatch;
- int k= current.indexOf(fSingleWildCard);
- if (k < 0) {
- currentMatch= textPosIn(text, tCurPos, end, current);
- if (currentMatch < 0)
- return false;
- } else {
- currentMatch= regExpPosIn(text, tCurPos, end, current);
- if (currentMatch < 0)
- return false;
- }
- tCurPos= currentMatch + current.length();
- i++;
- }
-
- /* process final segment */
- if (!fHasTrailingStar && tCurPos != end) {
- int clen= current.length();
- return regExpRegionMatches(text, end - clen, current, 0, clen);
- }
- return i == segCount ;
- }
- /**
- * This method parses the given pattern into segments seperated by wildcard '*' characters.
- * Since wildcards are not being used in this case, the pattern consists of a single segment.
- */
- private void parseNoWildCards() {
- fSegments= new String[1];
- fSegments[0]= fPattern;
- fBound= fLength;
- }
- /**
- * Parses the given pattern into segments seperated by wildcard '*' characters.
- * @param p, a String object that is a simple regular expression with * and/or ?
- */
- private void parseWildCards() {
- if(fPattern.startsWith("*"))//$NON-NLS-1$
- fHasLeadingStar= true;
- if(fPattern.endsWith("*")) {//$NON-NLS-1$
- /* make sure it's not an escaped wildcard */
- if (fLength > 1 && fPattern.charAt(fLength - 2) != '\\') {
- fHasTrailingStar= true;
- }
- }
-
- Vector temp= new Vector();
-
- int pos= 0;
- StringBuffer buf= new StringBuffer();
- while (pos < fLength) {
- char c= fPattern.charAt(pos++);
- switch (c) {
- case '\\':
- if (pos >= fLength) {
- buf.append(c);
- } else {
- char next= fPattern.charAt(pos++);
- /* if it's an escape sequence */
- if (next == '*' || next == '?' || next == '\\') {
- buf.append(next);
- } else {
- /* not an escape sequence, just insert literally */
- buf.append(c);
- buf.append(next);
- }
- }
- break;
- case '*':
- if (buf.length() > 0) {
- /* new segment */
- temp.addElement(buf.toString());
- fBound += buf.length();
- buf.setLength(0);
- }
- break;
- case '?':
- /* append special character representing single match wildcard */
- buf.append(fSingleWildCard);
- break;
- default:
- buf.append(c);
- }
- }
-
- /* add last buffer to segment list */
- if (buf.length() > 0) {
- temp.addElement(buf.toString());
- fBound += buf.length();
- }
-
- fSegments= new String[temp.size()];
- temp.copyInto(fSegments);
- }
- /**
- * @param <code>text</code>, a string which contains no wildcard
- * @param <code>start</code>, the starting index in the text for search, inclusive
- * @param <code>end</code>, the stopping point of search, exclusive
- * @return the starting index in the text of the pattern , or -1 if not found
- */
- protected int posIn(String text, int start, int end) {//no wild card in pattern
- int max= end - fLength;
-
- if (!fIgnoreCase) {
- int i= text.indexOf(fPattern, start);
- if (i == -1 || i > max)
- return -1;
- return i;
- }
-
- for (int i= start; i <= max; ++i) {
- if (text.regionMatches(true, i, fPattern, 0, fLength))
- return i;
- }
-
- return -1;
- }
- /**
- * @param <code>text</code>, a simple regular expression that may only contain '?'(s)
- * @param <code>start</code>, the starting index in the text for search, inclusive
- * @param <code>end</code>, the stopping point of search, exclusive
- * @param <code>p</code>, a simple regular expression that may contains '?'
- * @param <code>caseIgnored</code>, wether the pattern is not casesensitive
- * @return the starting index in the text of the pattern , or -1 if not found
- */
- protected int regExpPosIn(String text, int start, int end, String p) {
- int plen= p.length();
-
- int max= end - plen;
- for (int i= start; i <= max; ++i) {
- if (regExpRegionMatches(text, i, p, 0, plen))
- return i;
- }
- return -1;
- }
- /**
- *
- * @return boolean
- * @param <code>text</code>, a String to match
- * @param <code>start</code>, int that indicates the starting index of match, inclusive
- * @param <code>end</code> int that indicates the ending index of match, exclusive
- * @param <code>p</code>, String, String, a simple regular expression that may contain '?'
- * @param <code>ignoreCase</code>, boolean indicating wether code>p</code> is case sensitive
- */
- protected boolean regExpRegionMatches(String text, int tStart, String p, int pStart, int plen) {
- while (plen-- > 0) {
- char tchar= text.charAt(tStart++);
- char pchar= p.charAt(pStart++);
-
- /* process wild cards */
- if (!fIgnoreWildCards) {
- /* skip single wild cards */
- if (pchar == fSingleWildCard) {
- continue;
- }
- }
- if (pchar == tchar)
- continue;
- if (fIgnoreCase) {
- if (Character.toUpperCase(tchar) == Character.toUpperCase(pchar))
- continue;
- // comparing after converting to upper case doesn't handle all cases;
- // also compare after converting to lower case
- if (Character.toLowerCase(tchar) == Character.toLowerCase(pchar))
- continue;
- }
- return false;
- }
- return true;
- }
- /**
- * @param <code>text</code>, the string to match
- * @param <code>start</code>, the starting index in the text for search, inclusive
- * @param <code>end</code>, the stopping point of search, exclusive
- * @param code>p</code>, a string that has no wildcard
- * @param <code>ignoreCase</code>, boolean indicating wether code>p</code> is case sensitive
- * @return the starting index in the text of the pattern , or -1 if not found
- */
- protected int textPosIn(String text, int start, int end, String p) {
-
- int plen= p.length();
- int max= end - plen;
-
- if (!fIgnoreCase) {
- int i= text.indexOf(p, start);
- if (i == -1 || i > max)
- return -1;
- return i;
- }
-
- for (int i= start; i <= max; ++i) {
- if (text.regionMatches(true, i, p, 0, plen))
- return i;
- }
-
- return -1;
- }
-}
\ No newline at end of file
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