1 /* 2 * ==================================================================== 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * ==================================================================== 20 * 21 * This software consists of voluntary contributions made by many 22 * individuals on behalf of the Apache Software Foundation. For more 23 * information on the Apache Software Foundation, please see 24 * <http://www.apache.org/>. 25 * 26 */ 27 28 package org.apache.hc.core5.http.message; 29 30 import java.util.BitSet; 31 import java.util.Iterator; 32 33 import org.apache.hc.core5.http.Header; 34 import org.apache.hc.core5.util.TextUtils; 35 36 /** 37 * {@link java.util.Iterator} of {@link org.apache.hc.core5.http.Header} tokens.. 38 * 39 * @since 4.0 40 */ 41 public class BasicTokenIterator extends AbstractHeaderElementIterator<String> { 42 43 private static final BitSet COMMA = TokenParser.INIT_BITSET(','); 44 45 private final TokenParser parser; 46 47 /** 48 * Creates a new instance of {@link BasicTokenIterator}. 49 * 50 * @param headerIterator the iterator for the headers to tokenize 51 */ 52 public BasicTokenIterator(final Iterator<Header> headerIterator) { 53 super(headerIterator); 54 this.parser = TokenParser.INSTANCE; 55 } 56 57 @Override 58 String parseHeaderElement(final CharSequence buf, final ParserCursor cursor) { 59 final String token = this.parser.parseToken(buf, cursor, COMMA); 60 if (!cursor.atEnd()) { 61 final int pos = cursor.getPos(); 62 if (buf.charAt(pos) == ',') { 63 cursor.updatePos(pos + 1); 64 } 65 } 66 return !TextUtils.isBlank(token) ? token : null; 67 } 68 69 } 70