Apigee has an extensive Force.com REST interface to interact with Salesforce. Follow this tutorial to create an app in apigee, create a remote connection in Salesforce, add a user to the app to get your smart-key.

Complete the tutorial below to get the information needed to run this class:

http://developer.apigee.com/salesforce_tutorial.html

You will need the following to run this class:
1. Smart-key
2. Application Name

import com.apigee.sdk.oauth.api.exception.RestCallException;
import com.apigee.sdk.oauth.api.rest.RestCallResult;
import com.apigee.sdk.oauth.api.rest.RestCall;
import com.apigee.sdk.oauth.impl.model.Request;

public class ForceApigee {

	   //Configure your SMARTKEY and APPNAME
	   final static String SMARTKEY = "YOURSMARTKEY";
	   final static String APPNAME = "YOURAPPLICATIONNAME";
	   final static String PROVIDER = "salesforce";
	   
	   final static String VERSIONENDPOINT = "/services/data";
	   final static String RESOURCESENDPOINT = "/services/data/v27.0";
	   final static String SOBJECTENDPOINT = "/services/data/v27.0/sobjects";
	   final static String SOBJECTBASICENDPOINT = "/services/data/v24.0/sobjects/Account";
	   final static String SOBJECTDESCRIBEENDPOINT = "/services/data/v27.0/sobjects/Account/describe";
	   final static String SOQLQUERYENDPOINT = "/services/data/v24.0/query?q=SELECT name from Account";
	   final static String SOQLSEARCHENDPOINT = "/services/data/v24.0/search?q=FIND {test} IN ALL FIELDS";
	
	   public static String callToSalesforce(Request.HttpVerb verb, String Endpoint)
	   {
		   try 
		   {
	           RestCallResult result = new RestCall(verb, Endpoint)
	             .withSmartKey(SMARTKEY)
	             .toProvider(PROVIDER)
	             .usingApp(APPNAME)
	             .invoke();
				 return result.getResponsePayload().toString();
	       } catch (RestCallException e) {
			   return e.getMessage();
	       }
	   } 
	   
	   public static void main(String[] args)
	   {
	   		System.out.println("***VERSIONENDPOINT****: \n" + callToSalesforce(Request.HttpVerb.GET, VERSIONENDPOINT));
	   		System.out.println("***RESOURCESENDPOINT***: \n" + callToSalesforce(Request.HttpVerb.GET, RESOURCESENDPOINT));
	   		System.out.println("***SOBJECTENDPOINT***: \n" + callToSalesforce(Request.HttpVerb.GET, SOBJECTENDPOINT));
	   		System.out.println("***SOBJECTBASICENDPOINT***: \n" + callToSalesforce(Request.HttpVerb.GET, SOBJECTBASICENDPOINT));
	   		System.out.println("***SOBJECTDESCRIBEENDPOINT***: \n" + callToSalesforce(Request.HttpVerb.GET, SOBJECTDESCRIBEENDPOINT));
	   		System.out.println("***SOQLQUERYENDPOINT***: \n" + callToSalesforce(Request.HttpVerb.GET, SOQLQUERYENDPOINT));
	   		System.out.println("***SOQLSEARCHENDPOINT***: \n" + callToSalesforce(Request.HttpVerb.GET, SOQLSEARCHENDPOINT));
	   }
}