Examples with InitializerDeclaration org.drools.javaparser.ast.body.InitializerDeclaration used on opensource projects

Example 1 with InitializerDeclaration

use of org.drools.javaparser.ast.body.InitializerDeclaration in project drools by kiegroup.

the class PackageModel method getRulesSource.

public RuleSourceResult getRulesSource() {
    CompilationUnit cu = new CompilationUnit();
    cu.setPackageDeclaration(name);
    manageImportForCompilationUnit(cu);
    ClassOrInterfaceDeclaration rulesClass = cu.addClass(rulesFileName);
    rulesClass.addImplementedType(Model.class);
    BodyDeclaration<?> dateFormatter = JavaParser.parseBodyDeclaration("public final static DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(DateUtils.getDateFormatMask());\n");
    rulesClass.addMember(dateFormatter);
    BodyDeclaration<?> getNameMethod = JavaParser.parseBodyDeclaration("    @Override\n" + "        public String getName() {\n" + "        return \"" + name + "\";\n" + "    }\n");
    rulesClass.addMember(getNameMethod);
    BodyDeclaration<?> getRulesMethod = JavaParser.parseBodyDeclaration("    @Override\n" + "    public List<Rule> getRules() {\n" + "        return rules;\n" + "    }\n");
    rulesClass.addMember(getRulesMethod);
    StringBuilder sb = new StringBuilder("\n");
    sb.append("With the following expression ID:\n");
    sb.append(exprIdGenerator.toString());
    sb.append("\n");
    JavadocComment exprIdComment = new JavadocComment(sb.toString());
    getRulesMethod.setComment(exprIdComment);
    BodyDeclaration<?> getGlobalsMethod = JavaParser.parseBodyDeclaration("    @Override\n" + "    public List<Global> getGlobals() {\n" + "        return globals;\n" + "    }\n");
    rulesClass.addMember(getGlobalsMethod);
    BodyDeclaration<?> getQueriesMethod = JavaParser.parseBodyDeclaration("    @Override\n" + "    public List<Query> getQueries() {\n" + "        return queries;\n" + "    }\n");
    rulesClass.addMember(getQueriesMethod);
    BodyDeclaration<?> getTypeMetaDataMethod = JavaParser.parseBodyDeclaration("    @Override\n" + "    public List<TypeMetaData> getTypeMetaDatas() {\n" + "        return typeMetaDatas;\n" + "    }\n");
    rulesClass.addMember(getTypeMetaDataMethod);
    for (Map.Entry<String, MethodCallExpr> windowReference : windowReferences.entrySet()) {
        FieldDeclaration f = rulesClass.addField(WINDOW_REFERENCE_TYPE, windowReference.getKey(), Modifier.PUBLIC, Modifier.STATIC, Modifier.FINAL);
        f.getVariables().get(0).setInitializer(windowReference.getValue());
    }
    for (Map.Entry<String, Class<?>> g : getGlobals().entrySet()) {
        addGlobalField(rulesClass, getName(), g.getKey(), g.getValue());
    }
    for (Map.Entry<String, QueryGenerator.QueryDefWithType> queryDef : queryDefWithType.entrySet()) {
        FieldDeclaration field = rulesClass.addField(queryDef.getValue().getQueryType(), queryDef.getKey(), Modifier.PUBLIC, Modifier.STATIC, Modifier.FINAL);
        field.getVariables().get(0).setInitializer(queryDef.getValue().getMethodCallExpr());
    }
    for (Map.Entry<String, MethodDeclaration> methodName : queryMethods.entrySet()) {
        FieldDeclaration field = rulesClass.addField(methodName.getValue().getType(), methodName.getKey(), Modifier.FINAL);
        field.getVariables().get(0).setInitializer(new MethodCallExpr(null, methodName.getKey()));
    }
    // instance initializer block.
    // add to `rules` list the result of invoking each method for rule
    InitializerDeclaration rulesListInitializer = new InitializerDeclaration();
    BlockStmt rulesListInitializerBody = new BlockStmt();
    rulesListInitializer.setBody(rulesListInitializerBody);
    queryMethods.values().forEach(rulesClass::addMember);
    buildArtifactsDeclaration(queryMethods.keySet(), rulesClass, rulesListInitializerBody, "Query", "queries", false);
    buildArtifactsDeclaration(windowReferences.keySet(), rulesClass, rulesListInitializerBody, "WindowReference", "windowReferences", false);
    buildArtifactsDeclaration(getGlobals().keySet(), rulesClass, rulesListInitializerBody, "Global", "globals", true);
    if (!typeMetaDataExpressions.isEmpty()) {
        BodyDeclaration<?> typeMetaDatasList = JavaParser.parseBodyDeclaration("List<TypeMetaData> typeMetaDatas = new ArrayList<>();");
        rulesClass.addMember(typeMetaDatasList);
        for (Expression expr : typeMetaDataExpressions) {
            addInitStatement(rulesListInitializerBody, expr, "typeMetaDatas");
        }
    } else {
        BodyDeclaration<?> typeMetaDatasList = JavaParser.parseBodyDeclaration("List<TypeMetaData> typeMetaDatas = Collections.emptyList();");
        rulesClass.addMember(typeMetaDatasList);
    }
    functions.forEach(rulesClass::addMember);
    RuleSourceResult results = new RuleSourceResult(cu);
    int ruleCount = ruleMethods.size();
    boolean requiresMultipleRulesLists = ruleCount >= RULES_DECLARATION_PER_CLASS - 1;
    MethodCallExpr rules = buildRulesField(rulesClass);
    if (requiresMultipleRulesLists) {
        addRulesList(rulesListInitializerBody, "rulesList");
    }
    // each method per Drlx parser result
    int count = -1;
    Map<Integer, ClassOrInterfaceDeclaration> splitted = new LinkedHashMap<>();
    for (Entry<String, MethodDeclaration> ruleMethodKV : ruleMethods.entrySet()) {
        ClassOrInterfaceDeclaration rulesMethodClass = splitted.computeIfAbsent(++count / RULES_PER_CLASS, i -> {
            CompilationUnit cuRulesMethod = new CompilationUnit();
            results.with(cuRulesMethod);
            cuRulesMethod.setPackageDeclaration(name);
            manageImportForCompilationUnit(cuRulesMethod);
            cuRulesMethod.addImport(JavaParser.parseImport("import static " + name + "." + rulesFileName + ".*;"));
            String currentRulesMethodClassName = rulesFileName + "RuleMethods" + i;
            return cuRulesMethod.addClass(currentRulesMethodClassName);
        });
        rulesMethodClass.addMember(ruleMethodKV.getValue());
        if (count % RULES_DECLARATION_PER_CLASS == RULES_DECLARATION_PER_CLASS - 1) {
            int index = count / RULES_DECLARATION_PER_CLASS;
            rules = buildRulesField(results, index);
            addRulesList(rulesListInitializerBody, rulesFileName + "Rules" + index + ".rulesList");
        }
        // manage in main class init block:
        rules.addArgument(new MethodCallExpr(new NameExpr(rulesMethodClass.getNameAsString()), ruleMethodKV.getKey()));
    }
    BodyDeclaration<?> rulesList = requiresMultipleRulesLists ? JavaParser.parseBodyDeclaration("List<Rule> rules = new ArrayList<>(" + ruleCount + ");") : JavaParser.parseBodyDeclaration("List<Rule> rules = rulesList;");
    rulesClass.addMember(rulesList);
    if (!rulesListInitializer.getBody().getStatements().isEmpty()) {
        rulesClass.addMember(rulesListInitializer);
    }
    return results;
}