File	Doc	Category	Size	Date	Package
BasicListHeaderIterator.java	API Doc	Android 1.5 API	5763	Wed May 06 22:41:10 BST 2009	org.apache.http.message

BasicListHeaderIterator

• java.lang.Object

Fields Summary
protected final List	allHeaders A list of headers to iterate over. Not all elements of this array are necessarily part of the iteration.
protected int	currentIndex The position of the next header in {@link #allHeaders allHeaders}. Negative if the iteration is over.
protected int	lastIndex The position of the last returned header. Negative if none has been returned so far.
protected String	headerName The header name to filter by. null to iterate over all headers in the array.

Constructors Summary

public BasicListHeaderIterator(List headers, String name) 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 null for any 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;

Methods Summary
protected boolean	filterHeader(int index) Checks whether a header is part of the iteration. param index the index of the header to check return true if the header should be part of the iteration, false to skip 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);
protected int	findNext(int from) 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 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;
public boolean	hasNext() return (this.currentIndex >= 0);
public final java.lang.Object	next() 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 return nextHeader();
public org.apache.http.Header	nextHeader() Obtains the next header from this iteration. return the next header in this iteration throws NoSuchElementException if there are no more headers 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);
public void	remove() Removes the header that was returned last. 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