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package com.sun.jersey.core.impl.provider.header;
import com.sun.jersey.core.header.reader.HttpHeaderReader;
import com.sun.jersey.core.header.reader.HttpHeaderReader.Event;
import com.sun.jersey.spi.HeaderDelegateProvider;
import java.text.ParseException;
import javax.ws.rs.core.EntityTag;
/**
*
* @author Marc.Hadley@Sun.Com
*/
public class EntityTagProvider implements HeaderDelegateProvider<EntityTag> {
public boolean supports(Class<?> type) {
return type == EntityTag.class;
}
public String toString(EntityTag header) {
StringBuilder b = new StringBuilder();
if (header.isWeak())
b.append("W/");
WriterUtil.appendQuoted(b,header.getValue());
return b.toString();
}
public EntityTag fromString(String header) {
if (header == null)
throw new IllegalArgumentException("Entity tag is null");
try {
HttpHeaderReader reader = HttpHeaderReader.newInstance(header);
Event e = reader.next(false);
if (e == Event.QuotedString) {
return new EntityTag(reader.getEventValue());
} else if (e == Event.Token) {
if (reader.getEventValue().equals("W")) {
reader.nextSeparator('/');
return new EntityTag(reader.nextQuotedString(), true);
}
}
} catch (ParseException ex) {
throw new IllegalArgumentException(
"Error parsing entity tag '" + header + "'", ex);
}
throw new IllegalArgumentException(
"Error parsing entity tag '" + header + "'");
}
}