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- /*
- @ITMillApache2LicenseForJavaFiles@
- */
- package com.vaadin.data.validator;
-
- import java.util.regex.Matcher;
- import java.util.regex.Pattern;
-
- /**
- * String validator comparing the string against a Java regular expression. Both
- * complete matches and substring matches are supported.
- *
- * <p>
- * For the Java regular expression syntax, see
- * {@link java.util.regex.Pattern#sum}
- * </p>
- * <p>
- * See {@link com.vaadin.data.validator.AbstractStringValidator} for more
- * information.
- * </p>
- *
- * @author IT Mill Ltd.
- * @version
- * @VERSION@
- * @since 5.4
- */
- @SuppressWarnings("serial")
- public class RegexpValidator extends AbstractStringValidator {
-
- private Pattern pattern;
- private boolean complete;
- private transient Matcher matcher = null;
-
- /**
- * Creates a validator for checking that the regular expression matches the
- * complete string to validate.
- *
- * @param regexp
- * a Java regular expression
- * @param errorMessage
- * the message to display in case the value does not validate.
- */
- public RegexpValidator(String regexp, String errorMessage) {
- this(regexp, true, errorMessage);
- }
-
- /**
- * Creates a validator for checking that the regular expression matches the
- * string to validate.
- *
- * @param regexp
- * a Java regular expression
- * @param complete
- * true to use check for a complete match, false to look for a
- * matching substring
- * @param errorMessage
- * the message to display in case the value does not validate.
- */
- public RegexpValidator(String regexp, boolean complete, String errorMessage) {
- super(errorMessage);
- pattern = Pattern.compile(regexp);
- this.complete = complete;
- }
-
- @Override
- protected boolean isValidString(String value) {
- if (complete) {
- return getMatcher(value).matches();
- } else {
- return getMatcher(value).find();
- }
- }
-
- /**
- * Get a new or reused matcher for the pattern
- *
- * @param value
- * the string to find matches in
- * @return Matcher for the string
- */
- private Matcher getMatcher(String value) {
- if (matcher == null) {
- matcher = pattern.matcher(value);
- } else {
- matcher.reset(value);
- }
- return matcher;
- }
-
- }
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