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Diffstat (limited to 'src/org/apache/http/message/BasicListHeaderIterator.java')
| -rw-r--r-- | src/org/apache/http/message/BasicListHeaderIterator.java | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/src/org/apache/http/message/BasicListHeaderIterator.java b/src/org/apache/http/message/BasicListHeaderIterator.java deleted file mode 100644 index 69b8c06..0000000 --- a/src/org/apache/http/message/BasicListHeaderIterator.java +++ /dev/null @@ -1,196 +0,0 @@ -/* - * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/message/BasicListHeaderIterator.java $ - * $Revision: 584542 $ - * $Date: 2007-10-14 06:29:34 -0700 (Sun, 14 Oct 2007) $ - * - * ==================================================================== - * 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 - * <http://www.apache.org/>. - * - */ - -package org.apache.http.message; - - -import java.util.List; -import java.util.NoSuchElementException; - -import org.apache.http.Header; -import org.apache.http.HeaderIterator; - - -/** - * Implementation of a {@link HeaderIterator} based on a {@link List}. - * For use by {@link HeaderGroup}. - * - * @version $Revision: 584542 $ - */ -public class BasicListHeaderIterator implements HeaderIterator { - - /** - * A list of headers to iterate over. - * Not all elements of this array are necessarily part of the iteration. - */ - protected final List allHeaders; - - - /** - * The position of the next header in {@link #allHeaders allHeaders}. - * Negative if the iteration is over. - */ - protected int currentIndex; - - - /** - * The position of the last returned header. - * Negative if none has been returned so far. - */ - protected int lastIndex; - - - /** - * The header name to filter by. - * <code>null</code> to iterate over all headers in the array. - */ - protected String headerName; - - - - /** - * Creates a new header iterator. - * - * @param headers a list of headers over which to iterate - * @param name the name of the headers over which to iterate, or - * <code>null</code> for any - */ - public BasicListHeaderIterator(List headers, String name) { - if (headers == null) { - throw new IllegalArgumentException - ("Header list must not be null."); - } - - this.allHeaders = headers; - this.headerName = name; - this.currentIndex = findNext(-1); - this.lastIndex = -1; - } - - - /** - * Determines the index of the next header. - * - * @param from one less than the index to consider first, - * -1 to search for the first header - * - * @return the index of the next header that matches the filter name, - * or negative if there are no more headers - */ - protected int findNext(int from) { - if (from < -1) - return -1; - - final int to = this.allHeaders.size()-1; - boolean found = false; - while (!found && (from < to)) { - from++; - found = filterHeader(from); - } - return found ? from : -1; - } - - - /** - * Checks whether a header is part of the iteration. - * - * @param index the index of the header to check - * - * @return <code>true</code> if the header should be part of the - * iteration, <code>false</code> to skip - */ - protected boolean filterHeader(int index) { - if (this.headerName == null) - return true; - - // non-header elements, including null, will trigger exceptions - final String name = ((Header)this.allHeaders.get(index)).getName(); - - return this.headerName.equalsIgnoreCase(name); - } - - - // non-javadoc, see interface HeaderIterator - public boolean hasNext() { - return (this.currentIndex >= 0); - } - - - /** - * Obtains the next header from this iteration. - * - * @return the next header in this iteration - * - * @throws NoSuchElementException if there are no more headers - */ - public Header nextHeader() - throws NoSuchElementException { - - final int current = this.currentIndex; - if (current < 0) { - throw new NoSuchElementException("Iteration already finished."); - } - - this.lastIndex = current; - this.currentIndex = findNext(current); - - return (Header) this.allHeaders.get(current); - } - - - /** - * Returns the next header. - * Same as {@link #nextHeader nextHeader}, but not type-safe. - * - * @return the next header in this iteration - * - * @throws NoSuchElementException if there are no more headers - */ - public final Object next() - throws NoSuchElementException { - return nextHeader(); - } - - - /** - * Removes the header that was returned last. - */ - public void remove() - throws UnsupportedOperationException { - - if (this.lastIndex < 0) { - throw new IllegalStateException("No header to remove."); - } - this.allHeaders.remove(this.lastIndex); - this.lastIndex = -1; - this.currentIndex--; // adjust for the removed element - } -} |