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package com.sun.jersey.server.impl.template;
import com.sun.jersey.spi.template.ResolvedViewable;
import com.sun.jersey.spi.template.TemplateContext;
import com.sun.jersey.api.core.HttpRequestContext;
import com.sun.jersey.api.core.HttpResponseContext;
import com.sun.jersey.api.view.Viewable;
import com.sun.jersey.core.header.QualitySourceMediaType;
import com.sun.jersey.core.reflection.ReflectionHelper;
import com.sun.jersey.server.impl.application.WebApplicationContext;
import com.sun.jersey.server.impl.uri.rules.HttpMethodRule;
import com.sun.jersey.server.probes.UriRuleProbeProvider;
import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ContainerRequestFilter;
import com.sun.jersey.spi.container.ContainerResponseFilter;
import com.sun.jersey.spi.uri.rules.UriRule;
import com.sun.jersey.spi.uri.rules.UriRuleContext;
import java.util.List;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
/**
* A viewable rule that defers the request to a template. If a template
* is not available then the rule is not accepted.
*
* @author [email protected]
*/
public class ViewableRule implements UriRule {
private final List priorityMediaTypes;
private final List requestFilters;
private final List responseFilters;
@Context TemplateContext tc;
public ViewableRule(
List priorityMediaTypes,
List requestFilters,
List responseFilters) {
this.priorityMediaTypes = priorityMediaTypes;
this.requestFilters = requestFilters;
this.responseFilters = responseFilters;
}
public final boolean accept(CharSequence path, Object resource, UriRuleContext context) {
UriRuleProbeProvider.ruleAccept(ViewableRule.class.getSimpleName(), path,
resource);
final HttpRequestContext request = context.getRequest();
// Only accept GET requests and internal matching requests
if (request.getMethod().equals("GET") ||
request.getMethod().equals(WebApplicationContext.HTTP_METHOD_MATCH_RESOURCE)) {
// Obtain the template path
final String templatePath = (path.length() > 0) ?
context.getMatchResult().group(1) :
"";
// Resolve the viewable
Viewable v = new Viewable(templatePath, resource);
ResolvedViewable rv = tc.resolveViewable(v);
if (rv == null) {
return false;
}
// If an internal match resource request then always return true
if (request.getMethod().equals(WebApplicationContext.HTTP_METHOD_MATCH_RESOURCE)) {
return true;
}
if (context.isTracingEnabled()) {
context.trace(String.format("accept implicit view: \"%s\" -> %s, %s",
templatePath,
ReflectionHelper.objectToString(resource),
rv.getTemplateName()));
}
// Push the response filters
context.pushContainerResponseFilters(responseFilters);
// Process the request filter
if (!requestFilters.isEmpty()) {
ContainerRequest containerRequest = context.getContainerRequest();
for (ContainerRequestFilter f : requestFilters) {
containerRequest = f.filter(containerRequest);
context.setContainerRequest(containerRequest);
}
}
final HttpResponseContext response = context.getResponse();
response.setStatus(200);
response.setEntity(rv);
if (!response.getHttpHeaders().containsKey("Content-Type")) {
MediaType contentType = getContentType(request, response);
response.getHttpHeaders().putSingle("Content-Type", contentType);
}
return true;
} else {
return false;
}
}
private MediaType getContentType(HttpRequestContext request, HttpResponseContext response) {
List accept = (priorityMediaTypes == null)
? request.getAcceptableMediaTypes()
: HttpMethodRule.getSpecificAcceptableMediaTypes(request.getAcceptableMediaTypes(),
priorityMediaTypes);
if (!accept.isEmpty()) {
MediaType contentType = accept.get(0);
if (!contentType.isWildcardType() && !contentType.isWildcardSubtype()) {
return contentType;
}
}
return null;
}
}