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package org.glassfish.jersey.message.internal;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
/**
* Common media types and functionality.
*
* @author Paul Sandoz
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public class MediaTypes {
/**
* WADL Media type.
*/
public final static MediaType WADL = MediaType.valueOf("application/vnd.sun.wadl+xml");
/**
* Fast infoset media type.
*/
public final static MediaType FAST_INFOSET = MediaType.valueOf("application/fastinfoset");
/**
* Comparator for lists of media types.
*
* The least specific content type of each list is obtained and then compared
* using {@link #MEDIA_TYPE_COMPARATOR}.
*
* Assumes each list is already ordered according to {@link #MEDIA_TYPE_COMPARATOR}
* and therefore the least specific media type is at the end of the list.
*/
public static final Comparator> MEDIA_TYPE_LIST_COMPARATOR =
new Comparator>() {
@Override
public int compare(List o1, List o2) {
return MEDIA_TYPE_COMPARATOR.compare(getLeastSpecific(o1), getLeastSpecific(o2));
}
public MediaType getLeastSpecific(List l) {
return l.get(l.size() - 1);
}
};
/**
* The general media type corresponding to *\\/*.
*
*/
public static final MediaType GENERAL_MEDIA_TYPE = new MediaType("*", "*");
/**
* A singleton list containing the general media type.
*/
public static final List GENERAL_MEDIA_TYPE_LIST = createMediaTypeList();
/**
* The general acceptable media type corresponding to *\\/*.
*
*/
static final AcceptableMediaType GENERAL_ACCEPT_MEDIA_TYPE = new AcceptableMediaType("*", "*");
/**
* A singleton list containing the general acceptable media type.
*/
static final List GENERAL_ACCEPT_MEDIA_TYPE_LIST = createAcceptMediaTypeList();
/**
* A singleton list containing the general media type.
*/
public static final List GENERAL_QUALITY_SOURCE_MEDIA_TYPE_LIST = createQualitySourceMediaTypeList();
/**
* Comparator for lists of quality source media types.
*/
public static final Comparator QUALITY_SOURCE_MEDIA_TYPE_COMPARATOR = new Comparator() {
@Override
public int compare(QualitySourceMediaType o1, QualitySourceMediaType o2) {
int i = o2.getQualitySource() - o1.getQualitySource();
if (i != 0) {
return i;
}
return MediaTypes.MEDIA_TYPE_COMPARATOR.compare(o1, o2);
}
};
/**
* Comparator for media types. The more specific media types are preferred over
* the less specific ones:
*
* m/n < m/* < */*
*
* The actual media type values are ignored, i.e. the different media types are
* considered equal if they are comparably specific:
*
* compare(m/n, x/y) == 0
* compare(m/*, x/*) == 0
*/
public static final Comparator MEDIA_TYPE_COMPARATOR = new Comparator() {
@Override
public int compare(MediaType o1, MediaType o2) {
if (o1.isWildcardType() && !o2.isWildcardType()) {
return 1;
}
if (o2.isWildcardType() && !o1.isWildcardType()) {
return -1;
}
if (o1.isWildcardSubtype() && !o2.isWildcardSubtype()) {
return 1;
}
if (o2.isWildcardSubtype() && !o1.isWildcardSubtype()) {
return -1;
}
return 0;
}
};
/**
* Cache containing frequently requested media type values with a wildcard subtype.
*/
private static Map wildcardSubtypeCache = new HashMap() {
private static final long serialVersionUID = 3109256773218160485L;
{
put("application", new MediaType("application", MediaType.MEDIA_TYPE_WILDCARD));
put("multipart", new MediaType("multipart", MediaType.MEDIA_TYPE_WILDCARD));
put("text", new MediaType("text", MediaType.MEDIA_TYPE_WILDCARD));
}
};
/**
* Prevents initialization.
*/
private MediaTypes() {
}
/**
* Determine if the two media types are type-equal (their {@link MediaType#getType() type}
* and {@link MediaType#getSubtype() subtype} are equal). For example:
*
* m/n == m/n
* m/n;p1 == m/n;p2
*
* m/n != m/y
* m/n != x/n
* m/n != x/y
*
* @param m1 first media type.
* @param m2 second media type.
* @return {@code true} if the two media types are of the same type and subtype,
* {@code false} otherwise.
*/
public static boolean typeEqual(MediaType m1, MediaType m2) {
if (m1 == null || m2 == null) {
return false;
}
return m1.getSubtype().equalsIgnoreCase(m2.getSubtype()) && m1.getType().equalsIgnoreCase(m2.getType());
}
/**
* Determine if the two list of media types share a common
* {@link #typeEqual(javax.ws.rs.core.MediaType, javax.ws.rs.core.MediaType) type-equal}
* sub-list.
*
* @param ml1 first media type list.
* @param ml2 second media type list.
* @return {@code true} if the two media type lists intersect by sharing a
* common type-equal sub-list, {@code false} otherwise.
*/
public static boolean intersect(List ml1, List ml2) {
for (MediaType m1 : ml1) {
for (MediaType m2 : ml2) {
if (MediaTypes.typeEqual(m1, m2)) {
return true;
}
}
}
return false;
}
/**
* Get the most specific media type from a pair of media types. The most
* specific media type is the media type from the pair that has least
* wild cards present.
*
* @param m1 the first media type
* @param m2 the second media type
* @return the most specific media type. If the media types are equally
* specific then the first media type is returned.
*/
public static MediaType mostSpecific(MediaType m1, MediaType m2) {
if (m1.isWildcardSubtype() && !m2.isWildcardSubtype()) {
return m2;
}
if (m1.isWildcardType() && !m2.isWildcardType()) {
return m2;
}
return m1;
}
private static List createMediaTypeList() {
return Collections.singletonList(GENERAL_MEDIA_TYPE);
}
private static List createAcceptMediaTypeList() {
return Collections.singletonList(GENERAL_ACCEPT_MEDIA_TYPE);
}
/**
* Create the list of media types from the values declared in the {@link Consumes}
* annotation.
*
* @param annotation the Consumes annotation.
* @return the list of {@link MediaType}, ordered according to {@link #MEDIA_TYPE_COMPARATOR}.
*/
public static List createFrom(Consumes annotation) {
if (annotation == null) {
return GENERAL_MEDIA_TYPE_LIST;
}
return createFrom(annotation.value());
}
/**
* Create the list of media types from the values declared in the {@link Produces}
* annotation.
*
* @param annotation the Produces annotation.
* @return the list of {@link MediaType}, ordered according to {@link #MEDIA_TYPE_COMPARATOR}.
*/
public static List createFrom(Produces annotation) {
if (annotation == null) {
return GENERAL_MEDIA_TYPE_LIST;
}
return createFrom(annotation.value());
}
/**
* Create a list of media type from a string array of media types.
*
* @param mediaTypes the string array of media types.
* @return the list of {@link MediaType}, ordered according to {@link #MEDIA_TYPE_COMPARATOR}.
*/
public static List createFrom(String[] mediaTypes) {
List l = new ArrayList();
try {
for (String mediaType : mediaTypes) {
HttpHeaderReader.readMediaTypes(l, mediaType);
}
Collections.sort(l, MEDIA_TYPE_COMPARATOR);
return l;
} catch (ParseException ex) {
throw new IllegalArgumentException(ex);
}
}
private static List createQualitySourceMediaTypeList() {
return Collections.singletonList(new QualitySourceMediaType("*", "*"));
}
/**
* Create a list of quality source media type from the Produces annotation.
*
* @param mime the Produces annotation.
* @return the list of {@link QualitySourceMediaType}, ordered according to
* {@link #QUALITY_SOURCE_MEDIA_TYPE_COMPARATOR}.
*/
public static List createQualitySourceMediaTypes(Produces mime) {
if (mime == null) {
return GENERAL_QUALITY_SOURCE_MEDIA_TYPE_LIST;
}
return new ArrayList(createQualitySourceMediaTypes(mime.value()));
}
/**
* Create a list of quality source media type from an array of media types.
*
* @param mediaTypes the array of meda types.
* @return the list of {@link QualitySourceMediaType}, ordered according to
* the quality source as the primary key and {@link #MEDIA_TYPE_COMPARATOR}
* as the secondary key.
*/
public static List createQualitySourceMediaTypes(String[] mediaTypes) {
try {
return HttpHeaderReader.readQualitySourceMediaType(mediaTypes);
} catch (ParseException ex) {
throw new IllegalArgumentException(ex);
}
}
/**
* Reads quality factor from given media type.
* @param mt media type to read quality parameter from
* @return quality factor of input media type
*/
public static int getQuality(MediaType mt) {
final String qParam = mt.getParameters().get(QualityFactor.QUALITY_FACTOR);
return readQualityFactor(qParam);
}
private static int readQualityFactor(final String qParam) throws IllegalArgumentException {
if (qParam == null) {
return QualityFactor.DEFAULT_QUALITY_FACTOR;
} else {
try {
return HttpHeaderReader.readQualityFactor(qParam);
} catch (ParseException ex) {
throw new IllegalArgumentException(ex);
}
}
}
/**
* Strips any quality parameters, i.e. q and qs from given media type.
*
* @param mediaType type to strip quality parameters from
* @return media type instance corresponding to the given one with quality parameters stripped off
* or the original instance if no such parameters are present
*/
public static MediaType stripQualityParams(MediaType mediaType) {
final Map oldParameters = mediaType.getParameters();
if (oldParameters.isEmpty()) {
return mediaType;
}
Map newParameters = new HashMap();
for (Map.Entry e : oldParameters.entrySet()) {
final boolean isQs = e.getKey().equals(QualitySourceMediaType.QUALITY_SOURCE_FACTOR);
final boolean isQ = e.getKey().equals(QualityFactor.QUALITY_FACTOR);
if (!isQ && !isQs) {
newParameters.put(e.getKey(), e.getValue());
}
}
return new MediaType(mediaType.getType(), mediaType.getSubtype(), newParameters);
}
/**
* Returns MediaType with wildcard in subtype.
*
* @param mediaType original MediaType.
* @return MediaType with wildcard in subtype.
*/
public static MediaType getTypeWildCart(MediaType mediaType) {
MediaType mt = wildcardSubtypeCache.get(mediaType.getType());
if (mt == null) {
mt = new MediaType(mediaType.getType(), MediaType.MEDIA_TYPE_WILDCARD);
}
return mt;
}
}