getObjectType

gistfile1.java

	public static Schema.SObjectType getObjectType(id subject){
		if(subject == null)
			return null;
		Schema.SObjectType result;
		string target = subject;
		Map<String, Schema.SObjectType> gd = Schema.getGlobalDescribe();
		string keyPrefix;
		
		for(Schema.SObjectType describe: gd.values() ){
			keyPrefix = describe.getDescribe().getKeyPrefix();
			if(keyPrefix != null && target.startsWith(keyPrefix)){
				result = describe;
				break; //no need to keep looking
			}
		}
		return result;
	}