Simplified AbstractInjectableProvider for building RESTful web services with Jersey using Guava to find the generic parameter types. See http://codyaray.com/2013/01/finding-generic-type-parameters-with-guava for details.

AbstractInjectableProvider.java

package com.mydomain.myapp.resources;
 
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
 
import javax.ws.rs.core.Context;
 
import com.google.common.reflect.TypeToken;

import com.sun.jersey.core.spi.component.ComponentContext;
import com.sun.jersey.core.spi.component.ComponentScope;
import com.sun.jersey.server.impl.inject.AbstractHttpContextInjectable;
import com.sun.jersey.spi.inject.Injectable;
import com.sun.jersey.spi.inject.InjectableProvider;
 
/**
 * Abstract class for making Jersey injectable providers.
 *
 * @param <T> the type of the injectable value.
 * @author codyaray
 * @since 2/01/2012
 * @see http://codahale.com/what-makes-jersey-interesting-injection-providers/
 */
public abstract class AbstractInjectableProvider<T> extends AbstractHttpContextInjectable<T>
    implements InjectableProvider<Context, Type> {
 
  @SuppressWarnings("serial")
  private final TypeToken<T> typeToken = new TypeToken<T>(getClass()) { };
  private final Type type = typeToken.getType();

  @Override
  public Injectable<T> getInjectable(ComponentContext componentContext, Context context, Type type) {
    return type.equals(this.type) ? getInjectable(componentContext, context) : null;
  }
 
  protected Injectable<T> getInjectable(ComponentContext componentContext, Context context) {
    return this;
  }
 
  @Override
  public ComponentScope getScope() {
    return ComponentScope.PerRequest;
  }
}