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/*-
* ============LICENSE_START=======================================================
* PolicyEngineUtils
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.utils;
import java.io.IOException;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;
import java.util.Arrays;
import java.util.Base64;
import java.util.List;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.drools.core.io.impl.ReaderResource;
import org.drools.verifier.Verifier;
import org.drools.verifier.VerifierError;
import org.drools.verifier.builder.VerifierBuilder;
import org.drools.verifier.builder.VerifierBuilderFactory;
import org.kie.api.io.ResourceType;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.CharMatcher;
public class PolicyUtils {
public static final String EMAIL_PATTERN =
"^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@"
+ "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
private static final String PACKAGE_ERROR = "mismatched input '{' expecting one of the following tokens: '[package";
private static final String SUCCESS = "success";
private PolicyUtils(){
// Private Constructor
}
public static String objectToJsonString(Object o) throws JsonProcessingException{
ObjectMapper mapper = new ObjectMapper();
return mapper.writeValueAsString(o);
}
public static <T> T jsonStringToObject(String jsonString, Class<T> className) throws IOException{
ObjectMapper mapper = new ObjectMapper();
return mapper.readValue(jsonString, className);
}
public static String decode(String encodedString) throws UnsupportedEncodingException {
if(encodedString!=null && !encodedString.isEmpty()){
return new String(Base64.getDecoder().decode(encodedString) ,"UTF-8");
}else{
return null;
}
}
public static String[] decodeBasicEncoding(String encodedValue) throws Exception{
if(encodedValue!=null && encodedValue.contains("Basic ")){
String encodedUserPassword = encodedValue.replaceFirst("Basic" + " ", "");
String usernameAndPassword = null;
byte[] decodedBytes = Base64.getDecoder().decode(encodedUserPassword);
usernameAndPassword = new String(decodedBytes, "UTF-8");
StringTokenizer tokenizer = new StringTokenizer(usernameAndPassword, ":");
String username = tokenizer.nextToken();
String password = tokenizer.nextToken();
return new String[]{username, password};
}else{
return new String[]{};
}
}
public static String emptyPolicyValidator(String field){
String error;
if ("".equals(field) || field.contains(" ") || !field.matches("^[a-zA-Z0-9_]*$")) {
error = "The Value in Required Field will allow only '{0-9}, {a-z}, {A-Z}, _' following set of Combinations";
return error;
} else {
if(CharMatcher.ASCII.matchesAllOf((CharSequence) field)){
error = SUCCESS;
}else{
error = "The Value Contains Non ASCII Characters";
return error;
}
}
return error;
}
public static String emptyPolicyValidatorWithSpaceAllowed(String field){
String error;
if ("".equals(field) || !field.matches("^[a-zA-Z0-9_ ]*$")) {
error = "The Value in Required Field will allow only '{0-9}, {a-z}, {A-Z}, _' following set of Combinations";
return error;
} else {
if(CharMatcher.ASCII.matchesAllOf((CharSequence) field)){
error = SUCCESS;
}else{
error = "The Value Contains Non ASCII Characters";
return error;
}
}
return error;
}
public static String descriptionValidator(String field) {
String error;
if (field.contains("@CreatedBy:") || field.contains("@ModifiedBy:")) {
error = "The value in the description shouldn't contain @CreatedBy: or @ModifiedBy:";
return error;
} else {
error = SUCCESS;
}
return error;
}
public static Boolean isInteger(String number){
try{
Integer.parseInt(number);
}catch(NumberFormatException e){
return false;
}
return true;
}
public static String validateEmailAddress(String emailAddressValue) {
String error = SUCCESS;
List<String> emailList = Arrays.asList(emailAddressValue.split(","));
for(int i =0 ; i < emailList.size() ; i++){
Pattern pattern = Pattern.compile(EMAIL_PATTERN);
Matcher matcher = pattern.matcher(emailList.get(i).trim());
if(!matcher.matches()){
error = "Please check the Following Email Address is not Valid .... " +emailList.get(i);
return error;
}else{
error = SUCCESS;
}
}
return error;
}
/*
* Check for "[ERR" to see if there are any errors.
*/
public static String brmsRawValidate(String rule){
VerifierBuilder vBuilder = VerifierBuilderFactory.newVerifierBuilder();
Verifier verifier = vBuilder.newVerifier();
verifier.addResourcesToVerify(new ReaderResource(new StringReader(rule)), ResourceType.DRL);
// Check if there are any Errors in Verification.
if(!verifier.getErrors().isEmpty()){
boolean ignore = false;
StringBuilder message = new StringBuilder("Not a Valid DRL rule");
for(VerifierError error: verifier.getErrors()){
// Ignore annotations Error Messages
if(!error.getMessage().contains("'@'") && !error.getMessage().contains(PACKAGE_ERROR)){
ignore= true;
message.append("\n" + error.getMessage());
}
}
// Ignore new package names with {
// More checks for message to check if its a package error.
if(ignore && !message.toString().contains("Parser returned a null Package")){
message.append("[ERR 107]");
}
return message.toString();
}
return "";
}
/**
* Given a version string consisting of integers with dots between them, convert it into an array of ints.
*
* @param version
* @return
* @throws NumberFormatException
*/
public static int[] versionStringToArray(String version) throws NumberFormatException {
if (version == null || version.length() == 0) {
return new int[0];
}
String[] stringArray = version.split("\\.");
int[] resultArray = new int[stringArray.length];
for (int i = 0; i < stringArray.length; i++) {
resultArray[i] = Integer.parseInt(stringArray[i]);
}
return resultArray;
}
}
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