/* * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com) * * 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 org.traccar.helper; import java.util.ArrayList; import java.util.regex.Pattern; public class PatternBuilder { private final ArrayList<String> fragments = new ArrayList<>(); public PatternBuilder optional() { return optional(1); } public PatternBuilder optional(int count) { fragments.add(fragments.size() - count, "(?:"); fragments.add(")?"); return this; } public PatternBuilder expression(String s) { s = s.replaceAll("\\|$", "\\\\|"); // special case for delimiter fragments.add(s); return this; } public PatternBuilder text(String s) { fragments.add(s.replaceAll("([\\\\\\.\\[\\{\\(\\)\\*\\+\\?\\^\\$\\|])", "\\\\$1")); return this; } public PatternBuilder number(String s) { s = s.replace("dddd", "d{4}").replace("ddd", "d{3}").replace("dd", "d{2}"); s = s.replace("xxxx", "x{4}").replace("xxx", "x{3}").replace("xx", "x{2}"); s = s.replace("d", "\\d").replace("x", "[0-9a-fA-F]").replaceAll("([\\.])", "\\\\$1"); s = s.replaceAll("\\|$", "\\\\|").replaceAll("^\\|", "\\\\|"); // special case for delimiter fragments.add(s); return this; } public PatternBuilder any() { fragments.add(".*?"); return this; } public PatternBuilder binary(String s) { fragments.add(s.replaceAll("(\\p{XDigit}{2})", "\\\\$1")); return this; } public PatternBuilder or() { fragments.add("|"); return this; } public PatternBuilder groupBegin() { return expression("(?:"); } public PatternBuilder groupEnd() { return expression(")"); } public PatternBuilder groupEnd(String s) { return expression(")" + s); } public Pattern compile() { return Pattern.compile(toString(), Pattern.DOTALL); } @Override public String toString() { StringBuilder builder = new StringBuilder(); for (String fragment : fragments) { builder.append(fragment); } return builder.toString(); } }