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package org.glassfish.jersey.server.internal.inject;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import org.glassfish.jersey.server.model.Parameter;
import org.glassfish.jersey.server.spi.internal.ValueFactoryProvider;
import org.glassfish.hk2.api.Factory;
import org.glassfish.hk2.api.ServiceLocator;
/**
* A parameter value factory provider that provides parameter value factories
* which are using {@link MultivaluedParameterExtractorProvider} to extract parameter
* values from the supplied {@link javax.ws.rs.core.MultivaluedMap multivalued
* parameter map}.
*
* @author Paul Sandoz
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public abstract class AbstractValueFactoryProvider implements ValueFactoryProvider {
private final MultivaluedParameterExtractorProvider mpep;
private final ServiceLocator locator;
private final Set compatibleSources;
/**
* Initialize the provider.
*
* @param mpep multivalued map parameter extractor provider.
* @param locator HK2 service locator.
* @param compatibleSources compatible parameter sources.
*/
protected AbstractValueFactoryProvider(MultivaluedParameterExtractorProvider mpep,
ServiceLocator locator,
Parameter.Source... compatibleSources) {
this.mpep = mpep;
this.locator = locator;
this.compatibleSources = new HashSet(Arrays.asList(compatibleSources));
}
/**
* Get a parameter extractor that ignores default value set on the parameter.
*
* @param parameter parameter supported by the returned extractor.
* @return extractor supporting the parameter. The returned instance ignores
* any default values set on the parameter.
* @see #get(org.glassfish.jersey.server.model.Parameter)
*/
protected final MultivaluedParameterExtractor getWithoutDefaultValue(Parameter parameter) {
return mpep.getWithoutDefaultValue(parameter);
}
/**
* Get a parameter extractor. Unlike the extractor returned by the
* {@link #getWithoutDefaultValue(org.glassfish.jersey.server.model.Parameter)}
* method, the extractor returned from this method will use the default value
* set on the parameter, in case the parameter is not found in the supplied
* {@link javax.ws.rs.core.MultivaluedMap multivalued parameter map}.
*
* @param parameter parameter supported by the returned extractor.
* @return extractor supporting the parameter. The returned instance ignores
* any default values set on the parameter.
*/
protected final MultivaluedParameterExtractor get(Parameter parameter) {
return mpep.get(parameter);
}
/**
* Create a value factory for the parameter. May return {@code null} in case
* the parameter is not supported by the value factory provider.
*
* @param parameter parameter requesting the value factory instance.
* @return parameter value factory. Returns {@code null} if parameter is
* not supported.
*/
protected abstract Factory createValueFactory(Parameter parameter);
/**
* Get an injected value factory for the parameter. May return {@code null}
* in case the parameter is not supported by the value factory provider.
*
* @param parameter parameter requesting the value factory instance.
* @return injected parameter value factory. Returns {@code null} if parameter
* is not supported.
*/
@Override
public final Factory getValueFactory(Parameter parameter) {
if (!compatibleSources.contains(parameter.getSource())) {
// not compatible
return null;
}
final Factory valueFactory = createValueFactory(parameter);
if (valueFactory != null) {
locator.inject(valueFactory);
}
return valueFactory;
}
@Override
public PriorityType getPriority() {
return Priority.NORMAL;
}
/**
* Get the service locator.
*
* @return service locator.
*/
protected final ServiceLocator getLocator() {
return locator;
}
}