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 import org.apache.hc.core5.util.Tokenizer; 36 37 /** 38 * {@link java.util.Iterator} of {@link org.apache.hc.core5.http.Header} tokens.. 39 * 40 * @since 4.0 41 */ 42 public class BasicTokenIterator extends AbstractHeaderElementIterator<String> { 43 44 private static final BitSet COMMA = Tokenizer.INIT_BITSET(','); 45 46 private final Tokenizer tokenizer; 47 48 /** 49 * Creates a new instance of {@link BasicTokenIterator}. 50 * 51 * @param headerIterator the iterator for the headers to tokenize 52 */ 53 public BasicTokenIterator(final Iterator<Header> headerIterator) { 54 super(headerIterator); 55 this.tokenizer = Tokenizer.INSTANCE; 56 } 57 58 @Override 59 String parseHeaderElement(final CharSequence buf, final ParserCursor cursor) { 60 final String token = this.tokenizer.parseToken(buf, cursor, COMMA); 61 if (!cursor.atEnd()) { 62 final int pos = cursor.getPos(); 63 if (buf.charAt(pos) == ',') { 64 cursor.updatePos(pos + 1); 65 } 66 } 67 return !TextUtils.isBlank(token) ? token : null; 68 } 69 70 } 71