import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
-import java.util.Set;
/**
* A collection of HTTP header names and associated values. The
{
/**
* A list of HeaderElements
- *
*/
private final ArrayList headers = new ArrayList();
- static final DateFormat dateFormat = new HTTPDateFormat();
+ /**
+ * The HTTP dateformat used to parse date header fields.
+ */
+ private static final DateFormat dateFormat = new HTTPDateFormat();
+ /**
+ * Class for a Header element consisting of
+ * a name and value String.
+ */
static class HeaderElement
{
String name;
}
}
+ /**
+ * Default constructor.
+ */
public Headers()
{
+ // nothing to do
}
/**
}
/**
- * Returns the value of the specified header as a string. If
+ * Returns the value of the specified header as a string. If
* multiple values are present, the last one is returned.
+ *
+ * @param header the header name (case insensitive search)
+ * @return The header value or <code>null</code> if not found.
*/
public String getValue(String header)
{
}
/**
- * Returns the value of the specified header as an integer,
- * or -1 if the header is not present or not an integer.
+ * Returns the value of the specified header as an integer. If
+ * multiple values are present, the last one is returned.
+ *
+ * @param header the header name (case insensitive search)
+ * @return The header value or <code>-1</code> if not present or
+ * not an integer value.
*/
public int getIntValue(String header)
{
}
catch (NumberFormatException e)
{
+ // fall through
}
return -1;
}
/**
- * Returns the value of the specified header as a long, or -1 if the
- * header is not present or cannot be parsed as a long.
+ * Returns the value of the specified header as a long. If
+ * multiple values are present, the last one is returned.
+ *
+ * @param header the header name (case insensitive search)
+ * @return The header value or <code>-1</code> if not present or
+ * not a long value.
*/
public long getLongValue(String header)
{
}
catch (NumberFormatException e)
{
+ // fall through
}
return -1;
}
/**
- * Returns the value of the specified header as a date,
- * or <code>null</code> if the header is not present or not a date.
+ * Returns the value of the specified header as a date. If
+ * multiple values are present, the last one is returned.
+ *
+ * @param header the header name (case insensitive search)
+ * @return The header value or <code>null</code> if not present or
+ * not a date value.
*/
public Date getDateValue(String header)
{
/**
* Add a header to this set of headers. If there is an existing
- * header with the same name, it is discarded.
+ * header with the same name it's value is replaced with the new value.
+ * If multiple headers of the same name exist only the last one's value
+ * is replaced.
*
* @param name the header name
* @param value the header value
*
- * @see #addValue
+ * @see #addValue(String, String)
*/
public void put(String name, String value)
- {
- remove(name);
- headers.add(headers.size(), new HeaderElement(name, value));
+ {
+ for (int i = headers.size() - 1; i >= 0; i--)
+ {
+ HeaderElement e = (HeaderElement)headers.get(i);
+ if (e.name.equalsIgnoreCase(name))
+ {
+ e.value = value;
+ return;
+ }
+ }
+
+ // nothing was replaced so add it as new HeaderElement
+ addValue(name, value);
}
-
+
/**
- * Add all headers from a set of headers to this set. If any of the
- * headers to be added have the same name as existing headers, the
- * existing headers will be discarded.
+ * Add all headers from a set of headers to this set. Any existing header
+ * with the same (case insensitive) name as one of the new headers will
+ * be overridden.
*
* @param o the headers to be added
*/
{
HeaderElement e = (HeaderElement)it.next();
remove(e.name);
- }
- for (Iterator it = o.iterator(); it.hasNext(); )
- {
- HeaderElement e = (HeaderElement)it.next();
addValue(e.name, e.value);
}
}
* Parse the specified InputStream, adding headers to this collection.
*
* @param in the InputStream.
+ * @throws IOException if I/O error occured.
*/
public void parse(InputStream in)
throws IOException
* @param name the header name
* @param value the header value
*
- * @see #put
+ * @see #put(String, String)
*/
public void addValue(String name, String value)
{
/**
* Get a new Map containing all the headers. The keys of the Map
- * are Strings (the header names). The values of the Map are
+ * are Strings (the header names). The headers will be included
+ * case-sensitive in the map so that querying must be done with the
+ * correct case of the needed header name. The values of the Map are
* unmodifiable Lists containing Strings (the header values).
*
- * <p>
- *
- * The returned map is modifiable. Changing it will not effect this
- * collection of Headers in any way.
+ * <p>
+ * The returned map is modifiable. Changing it will not effect this
+ * collection of Headers in any way.</p>
*
* @return a Map containing all the headers.
*/
*
* @param i the header index.
*
- * @return the header name.
+ * @return The header name, or <code>null</code> if index outside of range.
*
- * @see #getHeaderValue
+ * @see #getHeaderValue(int)
*/
public String getHeaderName(int i)
{
*
* @param i the header index.
*
- * @return the header value.
+ * @return the header value, or <code>null</code> if index outside of range.
*
- * @see #getHeaderName
+ * @see #getHeaderName(int)
*/
public String getHeaderValue(int i)
{
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