[DROOLS-3389] Created scenario simulation runtime modules (#2325)

* [DROOLS-3389] Created scenario simulation runner module

* [DROOLS-3389] Created scenario simulation runner module

* [DROOLS-3389] Updated to 7.22.0-SNAPSHOT

drools-scenario-simulation/drools-scenario-simulation-api/pom.xml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <parent>
+    <artifactId>drools-scenario-simulation</artifactId>
+    <groupId>org.drools</groupId>
+    <version>7.22.0-SNAPSHOT</version>
+  </parent>
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>drools-scenario-simulation-api</artifactId>
+  <packaging>jar</packaging>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.thoughtworks.xstream</groupId>
+      <artifactId>xstream</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>org.kie.soup</groupId>
+      <artifactId>kie-soup-project-datamodel-api</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>org.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+</project>

drools-scenario-simulation/drools-scenario-simulation-api/src/main/java/org/drools/scenariosimulation/api/model/ExpressionElement.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2018 Red Hat, Inc. and/or its affiliates.
+ *
+ * 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.
+ */
+package org.drools.scenariosimulation.api.model;
+
+import java.util.Objects;
+
+/**
+ * Single element of a expression, i.e. in person.fullName.last each component is an ExpressionElement
+ */
+public class ExpressionElement {
+
+    private String step;
+
+    public ExpressionElement() {
+    }
+
+    public ExpressionElement(String step) {
+        this.step = step;
+    }
+
+    public String getStep() {
+        return step;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        ExpressionElement that = (ExpressionElement) o;
+        return Objects.equals(getStep(), that.getStep());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(getStep());
+    }
+}

drools-scenario-simulation/drools-scenario-simulation-api/src/main/java/org/drools/scenariosimulation/api/model/ExpressionIdentifier.java

@@ -0,0 +1,84 @@
+/*
+ * Copyright 2018 Red Hat, Inc. and/or its affiliates.
+ *
+ * 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.
+ */
+package org.drools.scenariosimulation.api.model;
+
+import java.util.Objects;
+
+/**
+ * Identify an expression. It is defined by a name and a type
+ */
+public class ExpressionIdentifier {
+
+    private String name;
+    private FactMappingType type;
+
+    public enum NAME {
+        Description,
+        Expected,
+        Given,
+        Index,
+        Other;
+    }
+
+    public static ExpressionIdentifier INDEX = create(NAME.Index.name(), FactMappingType.OTHER);
+    public static ExpressionIdentifier DESCRIPTION = create(NAME.Description.name(), FactMappingType.OTHER);
+
+    public ExpressionIdentifier() {
+    }
+
+    public ExpressionIdentifier(String name, FactMappingType type) {
+        this.name = name;
+        this.type = type;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public FactMappingType getType() {
+        return type;
+    }
+
+    public static ExpressionIdentifier create(String name, FactMappingType type) {
+        return new ExpressionIdentifier(name, type);
+    }
+
+    @Override
+    public String toString() {
+        return "ExpressionIdentifier{" +
+                "name='" + name + '\'' +
+                ", type=" + type +
+                '}';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        ExpressionIdentifier that = (ExpressionIdentifier) o;
+        return Objects.equals(name, that.name) &&
+                type == that.type;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(name, type);
+    }
+}

drools-scenario-simulation/drools-scenario-simulation-api/src/main/java/org/drools/scenariosimulation/api/model/FactIdentifier.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright 2018 Red Hat, Inc. and/or its affiliates.
+ *
+ * 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.
+ */
+package org.drools.scenariosimulation.api.model;
+
+import java.util.Objects;
+
+/**
+ * A fact is identified by its name and the canonical name of its class
+ */
+public class FactIdentifier {
+
+    private String name;
+    private String className;
+
+    public static FactIdentifier INDEX = create("#", Integer.class.getCanonicalName());
+    public static FactIdentifier DESCRIPTION = create("Scenario description", String.class.getCanonicalName());
+    public static FactIdentifier EMPTY = create("Empty", Void.class.getName());
+
+    public FactIdentifier() {
+    }
+
+    public FactIdentifier(String name, String className) {
+        this.name = name;
+        this.className = className;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getClassName() {
+        return className;
+    }
+
+    public String getClassNameWithoutPackage() {
+        if (className.contains(".")) {
+            return className.substring(className.lastIndexOf(".") + 1);
+        } else {
+            return className;
+        }
+    }
+
+    public static FactIdentifier create(String name, String className) {
+        return new FactIdentifier(name, className);
+    }
+
+    @Override
+    public String toString() {
+        return "FactIdentifier{" +
+                "name='" + name + '\'' +
+                ", className='" + className + '\'' +
+                '}';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        FactIdentifier that = (FactIdentifier) o;
+        return Objects.equals(name, that.name) &&
+                Objects.equals(className, that.className);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(name, className);
+    }
+}