com.avaje.ebeaninternal.server.el.CharMatch Maven / Gradle / Ivy
package com.avaje.ebeaninternal.server.el;
/**
* Case insensitive string matching.
*
* Provides an alternative to using regular expressions.
*
*/
public final class CharMatch {
private final char[] upperChars;
private final int maxLength;
public CharMatch(String s) {
this.upperChars = s.toUpperCase().toCharArray();
this.maxLength = upperChars.length;
}
public boolean startsWith(String other) {
if (other == null || other.length() < maxLength) {
return false;
}
char ta[] = other.toCharArray();
int pos = -1;
while (++pos < maxLength) {
char c1 = upperChars[pos];
char c2 = Character.toUpperCase(ta[pos]);
if (c1 != c2) {
return false;
}
}
return true;
}
public boolean endsWith(String other) {
if (other == null || other.length() < maxLength) {
return false;
}
char ta[] = other.toCharArray();
int offset = ta.length - maxLength;
int pos = maxLength;
while (--pos >= 0) {
char c1 = upperChars[pos];
char c2 = Character.toUpperCase(ta[offset + pos]);
if (c1 != c2) {
return false;
}
}
return true;
}
}