/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* .
*
*/
package org.apache.hc.core5.http.message;
import java.util.BitSet;
import java.util.Iterator;
import org.apache.hc.core5.http.Header;
import org.apache.hc.core5.util.TextUtils;
/**
* {@link java.util.Iterator} of {@link org.apache.hc.core5.http.Header} tokens..
*
* @since 4.0
*/
public class BasicTokenIterator extends AbstractHeaderElementIterator {
private static final BitSet COMMA = TokenParser.INIT_BITSET(',');
private final TokenParser parser;
/**
* Creates a new instance of {@link BasicTokenIterator}.
*
* @param headerIterator the iterator for the headers to tokenize
*/
public BasicTokenIterator(final Iterator headerIterator) {
super(headerIterator);
this.parser = TokenParser.INSTANCE;
}
@Override
String parseHeaderElement(final CharSequence buf, final ParserCursor cursor) {
final String token = this.parser.parseToken(buf, cursor, COMMA);
if (!cursor.atEnd()) {
final int pos = cursor.getPos();
if (buf.charAt(pos) == ',') {
cursor.updatePos(pos + 1);
}
}
return !TextUtils.isBlank(token) ? token : null;
}
}