| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| package org.apache.unomi.api.utils; |
| |
| import org.apache.commons.beanutils.PropertyUtils; |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.unomi.api.Event; |
| import org.apache.unomi.api.PropertyType; |
| import org.apache.unomi.api.ValueType; |
| import org.apache.unomi.api.actions.Action; |
| import org.apache.unomi.api.actions.ActionType; |
| import org.apache.unomi.api.conditions.Condition; |
| import org.apache.unomi.api.conditions.ConditionType; |
| import org.apache.unomi.api.rules.Rule; |
| import org.apache.unomi.api.services.DefinitionsService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.util.*; |
| |
| /** |
| * Helper class to resolve condition, action and values types when loading definitions from JSON files |
| */ |
| public class ParserHelper { |
| |
| private static final Logger logger = LoggerFactory.getLogger(ParserHelper.class); |
| |
| private static final Set<String> unresolvedActionTypes = new HashSet<>(); |
| private static final Set<String> unresolvedConditionTypes = new HashSet<>(); |
| |
| private static final String VALUE_NAME_SEPARATOR = "::"; |
| private static final String PLACEHOLDER_PREFIX = "${"; |
| private static final String PLACEHOLDER_SUFFIX = "}"; |
| |
| public interface ConditionVisitor { |
| void visit(Condition condition); |
| void postVisit(Condition condition); |
| } |
| |
| public interface ValueExtractor { |
| Object extract(String valueAsString, Event event) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException; |
| } |
| |
| public static final Map<String,ValueExtractor> DEFAULT_VALUE_EXTRACTORS = new HashMap<>(); |
| static { |
| DEFAULT_VALUE_EXTRACTORS.put("profileProperty", (valueAsString, event) -> PropertyUtils.getProperty(event.getProfile(), "properties." + valueAsString)); |
| DEFAULT_VALUE_EXTRACTORS.put("simpleProfileProperty", (valueAsString, event) -> event.getProfile().getProperty(valueAsString)); |
| DEFAULT_VALUE_EXTRACTORS.put("sessionProperty", (valueAsString, event) -> PropertyUtils.getProperty(event.getSession(), "properties." + valueAsString)); |
| DEFAULT_VALUE_EXTRACTORS.put("simpleSessionProperty", (valueAsString, event) -> event.getSession().getProperty(valueAsString)); |
| DEFAULT_VALUE_EXTRACTORS.put("eventProperty", (valueAsString, event) -> PropertyUtils.getProperty(event, valueAsString)); |
| DEFAULT_VALUE_EXTRACTORS.put("simpleEventProperty", (valueAsString, event) -> event.getProperty(valueAsString)); |
| } |
| |
| public static boolean resolveConditionType(final DefinitionsService definitionsService, Condition rootCondition, String contextObjectName) { |
| if (rootCondition == null) { |
| logger.warn("Couldn't resolve null condition for {}", contextObjectName); |
| return false; |
| } |
| final List<String> result = new ArrayList<String>(); |
| visitConditions(rootCondition, new ConditionVisitor() { |
| @Override |
| public void visit(Condition condition) { |
| if (condition.getConditionType() == null) { |
| ConditionType conditionType = definitionsService.getConditionType(condition.getConditionTypeId()); |
| if (conditionType != null) { |
| unresolvedConditionTypes.remove(condition.getConditionTypeId()); |
| condition.setConditionType(conditionType); |
| } else { |
| result.add(condition.getConditionTypeId()); |
| if (!unresolvedConditionTypes.contains(condition.getConditionTypeId())) { |
| unresolvedConditionTypes.add(condition.getConditionTypeId()); |
| logger.warn("Couldn't resolve condition type: {} for {}", condition.getConditionTypeId(), contextObjectName); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void postVisit(Condition condition) { |
| } |
| }); |
| return result.isEmpty(); |
| } |
| |
| public static List<String> getConditionTypeIds(Condition rootCondition) { |
| final List<String> result = new ArrayList<String>(); |
| visitConditions(rootCondition, new ConditionVisitor() { |
| @Override |
| public void visit(Condition condition) { |
| result.add(condition.getConditionTypeId()); |
| } |
| |
| @Override |
| public void postVisit(Condition condition) { |
| } |
| }); |
| return result; |
| } |
| |
| public static void visitConditions(Condition rootCondition, ConditionVisitor visitor) { |
| visitor.visit(rootCondition); |
| // recursive call for sub-conditions as parameters |
| for (Object parameterValue : rootCondition.getParameterValues().values()) { |
| if (parameterValue instanceof Condition) { |
| Condition parameterValueCondition = (Condition) parameterValue; |
| visitConditions(parameterValueCondition, visitor); |
| } else if (parameterValue instanceof Collection) { |
| @SuppressWarnings("unchecked") |
| Collection<Object> valueList = (Collection<Object>) parameterValue; |
| for (Object value : valueList) { |
| if (value instanceof Condition) { |
| Condition valueCondition = (Condition) value; |
| visitConditions(valueCondition, visitor); |
| } |
| } |
| } |
| } |
| visitor.postVisit(rootCondition); |
| } |
| |
| public static boolean resolveActionTypes(DefinitionsService definitionsService, Rule rule, boolean ignoreErrors) { |
| boolean result = true; |
| if (rule.getActions() == null) { |
| if (!ignoreErrors) { |
| logger.warn("Rule {}:{} has null actions", rule.getItemId(), rule.getMetadata().getName()); |
| } |
| return false; |
| } |
| if (rule.getActions().isEmpty()) { |
| if (!ignoreErrors) { |
| logger.warn("Rule {}:{} has empty actions", rule.getItemId(), rule.getMetadata().getName()); |
| } |
| return false; |
| } |
| for (Action action : rule.getActions()) { |
| result &= ParserHelper.resolveActionType(definitionsService, action); |
| } |
| return result; |
| } |
| |
| public static boolean resolveActionType(DefinitionsService definitionsService, Action action) { |
| if (definitionsService == null) { |
| return false; |
| } |
| if (action.getActionType() == null) { |
| ActionType actionType = definitionsService.getActionType(action.getActionTypeId()); |
| if (actionType != null) { |
| unresolvedActionTypes.remove(action.getActionTypeId()); |
| action.setActionType(actionType); |
| } else { |
| if (!unresolvedActionTypes.contains(action.getActionTypeId())) { |
| logger.warn("Couldn't resolve action type : " + action.getActionTypeId()); |
| unresolvedActionTypes.add(action.getActionTypeId()); |
| } |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| public static void resolveValueType(DefinitionsService definitionsService, PropertyType propertyType) { |
| if (propertyType.getValueType() == null) { |
| ValueType valueType = definitionsService.getValueType(propertyType.getValueTypeId()); |
| if (valueType != null) { |
| propertyType.setValueType(valueType); |
| } |
| } |
| } |
| |
| |
| public static Set<String> resolveConditionEventTypes(Condition rootCondition) { |
| if (rootCondition == null) { |
| return new HashSet<>(); |
| } |
| EventTypeConditionVisitor eventTypeConditionVisitor = new EventTypeConditionVisitor(); |
| visitConditions(rootCondition, eventTypeConditionVisitor); |
| return eventTypeConditionVisitor.getEventTypeIds(); |
| } |
| |
| public static class EventTypeConditionVisitor implements ConditionVisitor { |
| |
| private Set<String> eventTypeIds = new HashSet<>(); |
| private Stack<String> conditionTypeStack = new Stack<>(); |
| |
| public void visit(Condition condition) { |
| conditionTypeStack.push(condition.getConditionTypeId()); |
| if ("eventTypeCondition".equals(condition.getConditionTypeId())) { |
| String eventTypeId = (String) condition.getParameter("eventTypeId"); |
| if (eventTypeId == null) { |
| logger.warn("Null eventTypeId found!"); |
| } else { |
| // we must now check the stack to see how many notConditions we have in the parent stack |
| if (conditionTypeStack.contains("notCondition")) { |
| logger.warn("Found complex negative event type condition, will always evaluate rule"); |
| eventTypeIds.add("*"); |
| } else { |
| eventTypeIds.add(eventTypeId); |
| } |
| } |
| } else if (condition.getConditionType() != null && condition.getConditionType().getParentCondition() != null) { |
| visitConditions(condition.getConditionType().getParentCondition(), this); |
| } |
| } |
| |
| public void postVisit(Condition condition) { |
| conditionTypeStack.pop(); |
| } |
| |
| public Set<String> getEventTypeIds() { |
| return eventTypeIds; |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| public static Map<String, Object> parseMap(Event event, Map<String, Object> map, Map<String, ValueExtractor> valueExtractors) { |
| Map<String, Object> values = new HashMap<>(); |
| for (Map.Entry<String, Object> entry : map.entrySet()) { |
| Object value = entry.getValue(); |
| if (value instanceof String) { |
| String s = (String) value; |
| try { |
| if (s.contains(PLACEHOLDER_PREFIX)) { |
| while (s.contains(PLACEHOLDER_PREFIX)) { |
| String substring = s.substring(s.indexOf(PLACEHOLDER_PREFIX) + 2, s.indexOf(PLACEHOLDER_SUFFIX)); |
| Object v = extractValue(substring, event, valueExtractors); |
| if (v != null) { |
| s = s.replace(PLACEHOLDER_PREFIX + substring + PLACEHOLDER_SUFFIX, v.toString()); |
| } else { |
| break; |
| } |
| } |
| value = s; |
| } else { |
| // check if we have special values |
| if (s.contains(VALUE_NAME_SEPARATOR)) { |
| value = extractValue(s, event, valueExtractors); |
| } |
| } |
| } catch (UnsupportedOperationException e) { |
| throw e; |
| } catch (Exception e) { |
| throw new UnsupportedOperationException(e); |
| } |
| } else if (value instanceof Map) { |
| value = parseMap(event, (Map<String, Object>) value, valueExtractors); |
| } |
| values.put(entry.getKey(), value); |
| } |
| return values; |
| } |
| |
| public static Object extractValue(String s, Event event, Map<String, ValueExtractor> valueExtractors) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException { |
| Object value = null; |
| |
| String valueType = StringUtils.substringBefore(s, VALUE_NAME_SEPARATOR); |
| String valueAsString = StringUtils.substringAfter(s, VALUE_NAME_SEPARATOR); |
| ValueExtractor extractor = valueExtractors.get(valueType); |
| if (extractor != null) { |
| value = extractor.extract(valueAsString, event); |
| } |
| |
| return value; |
| } |
| |
| @SuppressWarnings("unchecked") |
| public static boolean hasContextualParameter(Map<String, Object> values, Map<String, ValueExtractor> valueExtractors) { |
| for (Map.Entry<String, Object> entry : values.entrySet()) { |
| Object value = entry.getValue(); |
| if (value instanceof String) { |
| String s = (String) value; |
| String str = s.contains(PLACEHOLDER_PREFIX) ? |
| s.substring(s.indexOf(PLACEHOLDER_PREFIX) + 2, s.indexOf(PLACEHOLDER_SUFFIX)) : |
| s; |
| |
| if (str.contains(VALUE_NAME_SEPARATOR) && valueExtractors |
| .containsKey(StringUtils.substringBefore(str, VALUE_NAME_SEPARATOR))) { |
| return true; |
| } |
| } else if (value instanceof Map) { |
| if (hasContextualParameter((Map<String, Object>) value, valueExtractors)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| } |