/** * Transform a {@link Policy} into a {@link ResourceRequest} query string. * * @param policy * The {@link Policy} to use in the {@link ResourceRequest} * @param encryptionKeyId * The id of the encryption key. * @param encryptionKey * The actual encryption key. * @return A query string created from the policy. * @throws Exception * Thrown if there is a problem encoding or encrypting the policy. */ public static String policyToResourceRequestQueryString(Policy policy, String encryptionKeyId, String encryptionKey) throws Exception { ResourceRequest resourceRequest = new ResourceRequest(); resourceRequest.setEncodedPolicy(PolicyUtils.toBase64EncodedPolicy(policy)); resourceRequest.setEncryptionKeyId(encryptionKeyId); resourceRequest.setSignature(PolicyUtils.getPolicySignature(policy, encryptionKey)); return resourceRequestToQueryString(resourceRequest); }