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/*
* Copyright (c) 2010, 2019 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.jersey.message.internal;
import java.text.ParseException;
import java.util.Collections;
import java.util.Set;
import javax.ws.rs.core.EntityTag;
import org.glassfish.jersey.internal.LocalizationMessages;
/**
* A matching entity tag.
*
* Note that this type and it's super type cannot be used to create request
* header values for {@code If-Match} and {@code If-None-Match}
* of the form {@code If-Match: *} or {@code If-None-Match: *} as
* {@code *} is not a valid entity tag.
*
* @author Paul Sandoz
* @author Marek Potociar
*/
public class MatchingEntityTag extends EntityTag {
/**
* An empty set that corresponds to {@code If-Match: *} or {@code If-None-Match: *}.
*/
public static final Set ANY_MATCH = Collections.emptySet();
/**
* Create new strongly validating entity tag.
*
* @param value ETag header value.
*/
public MatchingEntityTag(String value) {
super(value, false);
}
/**
* Create new matching entity tag.
*
* @param value ETag header value.
* @param weak should be set to false, if strong validation is required,
* otherwise should be set to true.
*/
public MatchingEntityTag(String value, boolean weak) {
super(value, weak);
}
/**
* Create new matching entity tag out of provided header reader.
*
* @param reader HTTP header content reader.
* @return a new matching entity tag.
* @throws ParseException in case the header could not be parsed.
*/
public static MatchingEntityTag valueOf(HttpHeaderReader reader) throws ParseException {
final CharSequence tagString = reader.getRemainder();
HttpHeaderReader.Event e = reader.next(false);
if (e == HttpHeaderReader.Event.QuotedString) {
return new MatchingEntityTag(reader.getEventValue().toString());
} else if (e == HttpHeaderReader.Event.Token) {
CharSequence ev = reader.getEventValue();
if (ev != null && ev.length() == 1 && 'W' == ev.charAt(0)) {
reader.nextSeparator('/');
return new MatchingEntityTag(reader.nextQuotedString().toString(), true);
}
}
throw new ParseException(LocalizationMessages.ERROR_PARSING_ENTITY_TAG(tagString), reader.getIndex());
}
}