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package com.sun.jersey.core.spi.factory;
import com.sun.jersey.core.header.OutBoundHeaders;
import java.lang.reflect.Type;
import java.net.URI;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import javax.ws.rs.core.CacheControl;
import javax.ws.rs.core.EntityTag;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.NewCookie;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.core.Response.StatusType;
import javax.ws.rs.core.Variant;
/**
* An implementation of {@link ResponseBuilder}.
*
* @author [email protected]
*/
public final class ResponseBuilderImpl extends Response.ResponseBuilder {
private StatusType statusType = Status.NO_CONTENT;
private OutBoundHeaders headers;
private Object entity;
private Type entityType;
public ResponseBuilderImpl() { }
private ResponseBuilderImpl(ResponseBuilderImpl that) {
this.statusType = that.statusType;
this.entity = that.entity;
if (that.headers != null) {
this.headers = new OutBoundHeaders(that.headers);
} else {
this.headers = null;
}
this.entityType = that.entityType;
}
public Response.ResponseBuilder entityWithType(Object entity, Type entityType) {
this.entity = entity;
this.entityType = entityType;
return this;
}
private OutBoundHeaders getHeaders() {
if (headers == null)
headers = new OutBoundHeaders();
return headers;
}
// Response.Builder
public Response build() {
final Response r = new ResponseImpl(
statusType,
getHeaders(),
entity,
entityType);
reset();
return r;
}
private void reset() {
statusType = Status.NO_CONTENT;
headers = null;
entity = null;
entityType = null;
}
@Override
public ResponseBuilder clone() {
return new ResponseBuilderImpl(this);
}
public Response.ResponseBuilder status(StatusType status) {
if (status == null)
throw new IllegalArgumentException();
this.statusType = status;
return this;
};
public Response.ResponseBuilder status(int status) {
return status(ResponseImpl.toStatusType(status));
}
public Response.ResponseBuilder entity(Object entity) {
this.entity = entity;
this.entityType = (entity != null) ? entity.getClass() : null;
return this;
}
public Response.ResponseBuilder type(MediaType type) {
headerSingle(HttpHeaders.CONTENT_TYPE, type);
return this;
}
public Response.ResponseBuilder type(String type) {
return type(type == null ? null : MediaType.valueOf(type));
}
public Response.ResponseBuilder variant(Variant variant) {
if (variant == null) {
type((MediaType)null);
language((String)null);
encoding(null);
return this;
}
type(variant.getMediaType());
// TODO set charset
language(variant.getLanguage());
encoding(variant.getEncoding());
return this;
}
public Response.ResponseBuilder variants(List variants) {
if (variants == null) {
header(HttpHeaders.VARY, null);
return this;
}
if (variants.isEmpty())
return this;
MediaType accept = variants.get(0).getMediaType();
boolean vAccept = false;
Locale acceptLanguage = variants.get(0).getLanguage();
boolean vAcceptLanguage = false;
String acceptEncoding = variants.get(0).getEncoding();
boolean vAcceptEncoding = false;
for (Variant v : variants) {
vAccept |= !vAccept && vary(v.getMediaType(), accept);
vAcceptLanguage |= !vAcceptLanguage && vary(v.getLanguage(), acceptLanguage);
vAcceptEncoding |= !vAcceptEncoding && vary(v.getEncoding(), acceptEncoding);
}
StringBuilder vary = new StringBuilder();
append(vary, vAccept, HttpHeaders.ACCEPT);
append(vary, vAcceptLanguage, HttpHeaders.ACCEPT_LANGUAGE);
append(vary, vAcceptEncoding, HttpHeaders.ACCEPT_ENCODING);
if (vary.length() > 0)
header(HttpHeaders.VARY, vary.toString());
return this;
}
private boolean vary(MediaType v, MediaType vary) {
return v != null && !v.equals(vary);
}
private boolean vary(Locale v, Locale vary) {
return v != null && !v.equals(vary);
}
private boolean vary(String v, String vary) {
return v != null && !v.equalsIgnoreCase(vary);
}
private void append(StringBuilder sb, boolean v, String s) {
if (v) {
if (sb.length() > 0)
sb.append(',');
sb.append(s);
}
}
public Response.ResponseBuilder language(String language) {
headerSingle(HttpHeaders.CONTENT_LANGUAGE, language);
return this;
}
public Response.ResponseBuilder language(Locale language) {
headerSingle(HttpHeaders.CONTENT_LANGUAGE, language);
return this;
}
public Response.ResponseBuilder location(URI location) {
headerSingle(HttpHeaders.LOCATION, location);
return this;
}
public Response.ResponseBuilder contentLocation(URI location) {
headerSingle(HttpHeaders.CONTENT_LOCATION, location);
return this;
}
public Response.ResponseBuilder encoding(String encoding) {
headerSingle(HttpHeaders.CONTENT_ENCODING, encoding);
return this;
}
public Response.ResponseBuilder tag(EntityTag tag) {
headerSingle(HttpHeaders.ETAG, tag);
return this;
}
public Response.ResponseBuilder tag(String tag) {
return tag(tag == null ? null : new EntityTag(tag));
}
public Response.ResponseBuilder lastModified(Date lastModified) {
headerSingle(HttpHeaders.LAST_MODIFIED, lastModified);
return this;
}
public Response.ResponseBuilder cacheControl(CacheControl cacheControl) {
headerSingle(HttpHeaders.CACHE_CONTROL, cacheControl);
return this;
}
public Response.ResponseBuilder expires(Date expires) {
headerSingle(HttpHeaders.EXPIRES, expires);
return this;
}
public Response.ResponseBuilder cookie(NewCookie... cookies) {
if (cookies != null) {
for (NewCookie cookie : cookies)
header(HttpHeaders.SET_COOKIE, cookie);
} else {
header(HttpHeaders.SET_COOKIE, null);
}
return this;
}
public Response.ResponseBuilder header(String name, Object value) {
return header(name, value, false);
}
public Response.ResponseBuilder headerSingle(String name, Object value) {
return header(name, value, true);
}
public Response.ResponseBuilder header(String name, Object value, boolean single) {
if (value != null) {
if (single) {
getHeaders().putSingle(name, value);
} else {
getHeaders().add(name, value);
}
} else {
getHeaders().remove(name);
}
return this;
}
}
