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package com.sun.jersey.core.header;
import com.sun.jersey.core.header.reader.HttpHeaderReader;
import com.sun.jersey.core.header.reader.HttpHeaderReader.Event;
import java.text.ParseException;
import java.util.Collections;
import java.util.Set;
import javax.ws.rs.core.EntityTag;
/**
* A matching entity tag.
* <p>
* Note that this type and it's super type cannot be used to create request
* header values for <code>If-Match</code> and <code>If-None-Match</code>
* of the form <code>If-Match: *</code> or <code>If-None-Match: *</code> as
* <code>*</code> is not a valid entity tag.
*
* @author Paul.Sandoz@Sun.Com
*/
public class MatchingEntityTag extends EntityTag {
/**
* An empty set that corresponds to <code>If-Match: *</code> or
* <code>If-None-Match: *</code>.
*/
public static final Set<MatchingEntityTag> ANY_MATCH = Collections.emptySet();
public MatchingEntityTag(String value) {
super(value, false);
}
public MatchingEntityTag(String value, boolean weak) {
super(value, weak);
}
public static MatchingEntityTag valueOf(HttpHeaderReader reader) throws ParseException {
Event e = reader.next(false);
if (e == Event.QuotedString) {
return new MatchingEntityTag(reader.getEventValue());
} else if (e == Event.Token) {
String v = reader.getEventValue();
if (v.equals("W")) {
reader.nextSeparator('/');
return new MatchingEntityTag(reader.nextQuotedString(), true);
}
}
throw new ParseException("Error parsing entity tag", reader.getIndex());
}
}