com.google.i18n.phonenumbers.internal.RegexBasedMatcher Maven / Gradle / Ivy
/*
* Copyright (C) 2014 The Libphonenumber Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.i18n.phonenumbers.internal;
import com.google.i18n.phonenumbers.Phonemetadata.PhoneNumberDesc;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Implementation of the matcher API using the regular expressions in the PhoneNumberDesc
* proto message to match numbers.
*/
public final class RegexBasedMatcher implements MatcherApi {
public static MatcherApi create() {
return new RegexBasedMatcher();
}
private final RegexCache regexCache = new RegexCache(100);
private RegexBasedMatcher() {}
// @Override
public boolean matchNationalNumber(CharSequence number, PhoneNumberDesc numberDesc,
boolean allowPrefixMatch) {
String nationalNumberPattern = numberDesc.getNationalNumberPattern();
// We don't want to consider it a prefix match when matching non-empty input against an empty
// pattern.
if (nationalNumberPattern.length() == 0) {
return false;
}
return match(number, regexCache.getPatternForRegex(nationalNumberPattern), allowPrefixMatch);
}
private static boolean match(CharSequence number, Pattern pattern, boolean allowPrefixMatch) {
Matcher matcher = pattern.matcher(number);
if (!matcher.lookingAt()) {
return false;
} else {
return (matcher.matches()) ? true : allowPrefixMatch;
}
}
}