| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.netbeans.modules.php.editor.index; |
| |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import org.netbeans.api.annotations.common.NonNull; |
| |
| /** |
| * |
| * @author Marek Fukala |
| */ |
| public final class Signature { |
| public static final char ITEM_DELIMITER = ';'; |
| public static final String ITEM_DELIMITER_ALTERNATIVE = "**NB_SEMI**"; //NOI18N |
| private static final Logger LOGGER = Logger.getLogger(Signature.class.getName()); |
| private static final Pattern DECODE_PATTERN = Pattern.compile("\\*\\*NB_SEMI\\*\\*"); //NOI18N |
| private static final Pattern ENCODE_PATTERN = Pattern.compile(";"); //NOI18N |
| //shared array for better performance, |
| //access is supposed from one thread so perf |
| //shouldn't degrade due to synchronization |
| private static final int[] SHARED; |
| static { |
| SHARED = new int[50]; //hopefully noone will use more items in the signature |
| SHARED[0] = 0; |
| } |
| private final String signature; |
| private final int[] positions; |
| |
| public static Signature get(String signature) { |
| return new Signature(signature); |
| } |
| |
| private Signature(String signature) { |
| this.signature = signature; |
| this.positions = parseSignature(signature); |
| } |
| |
| @NonNull |
| public String string(int index) { |
| assert index >= 0 && index < positions.length; |
| String subString = signature.substring(positions[index], index == positions.length - 1 ? signature.length() : positions[index + 1] - 1); |
| return decodeItem(subString); |
| } |
| |
| public int integer(int index) { |
| String item = string(index); |
| if (item != null && item.length() > 0) { |
| try { |
| return Integer.parseInt(item); |
| } catch (NumberFormatException ex) { |
| LOGGER.log(Level.WARNING, "Can't parse item ''{0}'' as integer.", item); |
| return -1; |
| } |
| } else { |
| return -1; |
| } |
| } |
| |
| private static int[] parseSignature(String signature) { |
| synchronized (SHARED) { |
| int count = 0; |
| for (int i = 0; i < signature.length(); i++) { |
| if (signature.charAt(i) == ITEM_DELIMITER) { |
| SHARED[++count] = i + 1; |
| } |
| } |
| count++; //include the first zero |
| int[] a = new int[count]; |
| System.arraycopy(SHARED, 0, a, 0, count); |
| return a; |
| } |
| } |
| |
| public static String encodeItem(final String item) { |
| String result = null; |
| if (item != null) { |
| Matcher matcher = ENCODE_PATTERN.matcher(item); |
| result = matcher.replaceAll(ITEM_DELIMITER_ALTERNATIVE); |
| } |
| return result; |
| } |
| |
| private static String decodeItem(final String item) { |
| String result = null; |
| if (item != null) { |
| Matcher matcher = DECODE_PATTERN.matcher(item); |
| result = matcher.replaceAll(String.valueOf(ITEM_DELIMITER)); |
| } |
| return result; |
| } |
| |
| } |
| |