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package org.glassfish.jersey.message.internal;
import java.text.ParseException;
import java.util.Comparator;
import java.util.Map;
import javax.ws.rs.core.MediaType;
/**
* A quality source media type.
*
* @author Paul Sandoz
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public class QualitySourceMediaType extends MediaType implements Qualified {
/**
* Comparator for lists of quality source media types.
*/
public static final Comparator COMPARATOR =
new Comparator() {
@Override
public int compare(QualitySourceMediaType o1, QualitySourceMediaType o2) {
int i = Quality.QUALIFIED_COMPARATOR.compare(o1, o2);
if (i != 0) {
return i;
}
return MediaTypes.PARTIAL_ORDER_COMPARATOR.compare(o1, o2);
}
};
private final int qs;
/**
* Create new quality source media type instance with a {@link Quality#DEFAULT
* default quality factor} value.
*
* @param type the primary type, {@code null} is equivalent to
* {@link #MEDIA_TYPE_WILDCARD}
* @param subtype the subtype, {@code null} is equivalent to
* {@link #MEDIA_TYPE_WILDCARD}
*/
public QualitySourceMediaType(String type, String subtype) {
super(type, subtype); // no need to add default quality parameter.
qs = Quality.DEFAULT;
}
/**
* Create new quality source media type instance.
*
* @param type the primary type, {@code null} is equivalent to
* {@link #MEDIA_TYPE_WILDCARD}
* @param subtype the subtype, {@code null} is equivalent to
* {@link #MEDIA_TYPE_WILDCARD}
* @param quality quality source factor value in [ppt]. See {@link Qualified}.
* @param parameters a map of media type parameters, {@code null} is the same as an
* empty map.
*/
public QualitySourceMediaType(String type, String subtype, int quality, Map parameters) {
super(type, subtype, Quality.enhanceWithQualityParameter(parameters, Quality.QUALITY_SOURCE_PARAMETER_NAME, quality));
this.qs = quality;
}
// used by QualitySourceMediaType.valueOf method; no need to fix parameter map
private QualitySourceMediaType(String type, String subtype, Map parameters, int quality) {
super(type, subtype, parameters);
this.qs = quality;
}
/**
* Get quality source factor value (in [ppt]).
*
* @return quality source factor value.
*/
@Override
public int getQuality() {
return qs;
}
/**
* Create new quality source media type instance from the supplied
* {@link HttpHeaderReader HTTP header reader}.
*
* @param reader HTTP header reader.
* @return new acceptable media type instance.
*
* @throws ParseException in case the input data parsing failed.
*/
public static QualitySourceMediaType valueOf(HttpHeaderReader reader) throws ParseException {
// Skip any white space
reader.hasNext();
// Get the type
String type = reader.nextToken().toString();
reader.nextSeparator('/');
// Get the subtype
String subType = reader.nextToken().toString();
int qs = Quality.DEFAULT;
Map parameters = null;
if (reader.hasNext()) {
parameters = HttpHeaderReader.readParameters(reader);
if (parameters != null) {
qs = getQs(parameters.get(Quality.QUALITY_SOURCE_PARAMETER_NAME));
}
}
// use private constructor to skip quality value validation step
return new QualitySourceMediaType(type, subType, parameters, qs);
}
/**
* Extract quality source information from the supplied {@link MediaType} value.
*
* If no quality source parameter is present in the media type, {@link Quality#DEFAULT
* default quality} is returned.
*
* @param mediaType media type.
* @return quality source parameter value or {@link Quality#DEFAULT default quality},
* if no quality source parameter is present.
*
* @throws IllegalArgumentException in case the quality source parameter value could not be parsed.
*/
public static int getQualitySource(final MediaType mediaType) throws IllegalArgumentException {
if (mediaType instanceof QualitySourceMediaType) {
return ((QualitySourceMediaType) mediaType).getQuality();
} else {
return getQs(mediaType);
}
}
private static int getQs(MediaType mt) throws IllegalArgumentException {
try {
return getQs(mt.getParameters().get(Quality.QUALITY_SOURCE_PARAMETER_NAME));
} catch (ParseException ex) {
throw new IllegalArgumentException(ex);
}
}
private static int getQs(String v) throws ParseException {
if (v == null) {
return Quality.DEFAULT;
}
return HttpHeaderReader.readQualityFactor(v);
}
@Override
public boolean equals(Object obj) {
if (!super.equals(obj)) {
return false;
}
if (obj instanceof QualitySourceMediaType) {
final QualitySourceMediaType other = (QualitySourceMediaType) obj;
return this.qs == other.qs;
} else {
// obj is a plain MediaType instance
// with a quality source factor set to default (1.0)
return this.qs == Quality.DEFAULT;
}
}
@Override
public int hashCode() {
int hash = super.hashCode();
return (this.qs == Quality.DEFAULT) ? hash : 47 * hash + this.qs;
}
@Override
public String toString() {
return "{" + super.toString() + ", qs=" + qs + "}";
}
}