Examples with RuleDescr org.drools.compiler.lang.descr.RuleDescr used on opensource projects

Example 71 with RuleDescr

use of org.drools.compiler.lang.descr.RuleDescr in project drools by kiegroup.

the class MVELConsequenceBuilder method build.

public void build(final RuleBuildContext context, String consequenceName) {
    // pushing consequence LHS into the stack for variable resolution
    context.getDeclarationResolver().pushOnBuildStack(context.getRule().getLhs());
    try {
        MVELDialect dialect = (MVELDialect) context.getDialect("mvel");
        final RuleDescr ruleDescr = context.getRuleDescr();
        String text = (RuleImpl.DEFAULT_CONSEQUENCE_NAME.equals(consequenceName)) ? (String) ruleDescr.getConsequence() : (String) ruleDescr.getNamedConsequences().get(consequenceName);
        text = processMacros(text);
        Map<String, Declaration> decls = context.getDeclarationResolver().getDeclarations(context.getRule());
        AnalysisResult analysis = dialect.analyzeBlock(context, text, new BoundIdentifiers(DeclarationScopeResolver.getDeclarationClasses(decls), context, Collections.EMPTY_MAP, KnowledgeHelper.class), null, "drools", KnowledgeHelper.class);
        if (analysis == null) {
            // something bad happened, issue already logged in errors
            return;
        }
        final BoundIdentifiers usedIdentifiers = analysis.getBoundIdentifiers();
        final Declaration[] declarations = new Declaration[usedIdentifiers.getDeclrClasses().size()];
        String[] declrStr = new String[declarations.length];
        int j = 0;
        for (String str : usedIdentifiers.getDeclrClasses().keySet()) {
            declrStr[j] = str;
            declarations[j++] = decls.get(str);
        }
        Arrays.sort(declarations, SortDeclarations.instance);
        for (int i = 0; i < declrStr.length; i++) {
            declrStr[i] = declarations[i].getIdentifier();
        }
        context.getRule().setRequiredDeclarationsForConsequence(consequenceName, declrStr);
        MVELCompilationUnit unit = dialect.getMVELCompilationUnit(text, analysis, declarations, null, null, context, "drools", KnowledgeHelper.class, false, MVELCompilationUnit.Scope.CONSEQUENCE);
        MVELConsequence expr = new MVELConsequence(unit, dialect.getId(), consequenceName);
        if (RuleImpl.DEFAULT_CONSEQUENCE_NAME.equals(consequenceName)) {
            context.getRule().setConsequence(expr);
        } else {
            context.getRule().addNamedConsequence(consequenceName, expr);
        }
        MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
        data.addCompileable(context.getRule(), expr);
        expr.compile(data, context.getRule());
    } catch (final Exception e) {
        copyErrorLocation(e, context.getRuleDescr());
        context.addError(new DescrBuildError(context.getParentDescr(), context.getRuleDescr(), null, "Unable to build expression for 'consequence': " + e.getMessage() + " '" + context.getRuleDescr().getConsequence() + "'"));
    }
}

Example 72 with RuleDescr

use of org.drools.compiler.lang.descr.RuleDescr in project drools by kiegroup.

the class JavaDialect method addRule.

/**
 * This will add the rule for compiling later on.
 * It will not actually call the compiler
 */
public void addRule(final RuleBuildContext context) {
    final RuleImpl rule = context.getRule();
    final RuleDescr ruleDescr = context.getRuleDescr();
    RuleClassBuilder classBuilder = context.getDialect().getRuleClassBuilder();
    String ruleClass = classBuilder.buildRule(context);
    // return if there is no ruleclass name;
    if (ruleClass == null) {
        return;
    }
    // The compilation result is for the entire rule, so difficult to associate with any descr
    addClassCompileTask(this.pkg.getName() + "." + ruleDescr.getClassName(), ruleDescr, ruleClass, this.src, new RuleErrorHandler(ruleDescr, rule, "Rule Compilation error"));
    JavaDialectRuntimeData data = (JavaDialectRuntimeData) this.pkg.getDialectRuntimeRegistry().getDialectData(ID);
    for (Map.Entry<String, String> invokers : context.getInvokers().entrySet()) {
        final String className = invokers.getKey();
        // Check if an invoker - returnvalue, predicate, eval or consequence has been associated
        // If so we add it to the PackageCompilationData as it will get wired up on compilation
        final Object invoker = context.getInvokerLookup(className);
        if (invoker instanceof Wireable) {
            data.putInvoker(className, (Wireable) invoker);
        }
        final String text = invokers.getValue();
        final BaseDescr descr = context.getDescrLookup(className);
        addClassCompileTask(className, descr, text, this.src, new RuleInvokerErrorHandler(descr, rule, "Unable to generate rule invoker."));
    }
    // setup the line mappins for this rule
    final String name = this.pkg.getName() + "." + StringUtils.ucFirst(ruleDescr.getClassName());
    final LineMappings mapping = new LineMappings(name);
    mapping.setStartLine(ruleDescr.getConsequenceLine());
    mapping.setOffset(ruleDescr.getConsequenceOffset());
    this.pkg.getDialectRuntimeRegistry().getLineMappings().put(name, mapping);
}

Example 73 with RuleDescr

use of org.drools.compiler.lang.descr.RuleDescr in project drools by kiegroup.

the class JavaRuleClassBuilder method buildRule.

/* (non-Javadoc)
     * @see org.kie.rule.builder.dialect.java.RuleClassBuilder#buildRule(org.kie.rule.builder.BuildContext, org.kie.rule.builder.dialect.java.BuildUtils, org.kie.lang.descr.RuleDescr)
     */
public String buildRule(final RuleBuildContext context) {
    // If there is no compiled code, return
    if (context.getMethods().isEmpty()) {
        return null;
    }
    final String lineSeparator = System.getProperty("line.separator");
    final StringBuilder buffer = new StringBuilder();
    buffer.append("package ").append(context.getPkg().getName()).append(";").append(lineSeparator);
    for (String s : context.getPkg().getImports().keySet()) {
        buffer.append("import ").append(s).append(";");
    }
    buffer.append("import ").append(KnowledgeHelper.class.getName()).append(";");
    for (String s : context.getPkg().getStaticImports()) {
        buffer.append("import static ").append(s).append(";");
    }
    buffer.append(lineSeparator);
    final RuleDescr ruleDescr = context.getRuleDescr();
    buffer.append("public class ").append(StringUtils.ucFirst(ruleDescr.getClassName())).append(" {").append(lineSeparator);
    buffer.append("    private static final long serialVersionUID = 510l;").append(lineSeparator);
    for (int i = 0, size = context.getMethods().size() - 1; i < size; i++) {
        buffer.append(context.getMethods().get(i)).append(lineSeparator);
    }
    final String[] lines = buffer.toString().split(lineSeparator, -1);
    ruleDescr.setConsequenceOffset(lines.length);
    buffer.append(context.getMethods().get(context.getMethods().size() - 1)).append(lineSeparator);
    buffer.append("}");
    return buffer.toString();
}

Example 74 with RuleDescr

use of org.drools.compiler.lang.descr.RuleDescr in project drools by kiegroup.

the class JavaRuleBuilderHelper method createJavaAnalysisResult.

public static JavaAnalysisResult createJavaAnalysisResult(final RuleBuildContext context, String consequenceName, Map<String, Declaration> decls) {
    final RuleDescr ruleDescr = context.getRuleDescr();
    BoundIdentifiers bindings = new BoundIdentifiers(DeclarationScopeResolver.getDeclarationClasses(decls), context, Collections.EMPTY_MAP, KnowledgeHelper.class);
    String consequenceStr = (RuleImpl.DEFAULT_CONSEQUENCE_NAME.equals(consequenceName)) ? (String) ruleDescr.getConsequence() : (String) ruleDescr.getNamedConsequences().get(consequenceName);
    consequenceStr = consequenceStr + "\n";
    return (JavaAnalysisResult) context.getDialect().analyzeBlock(context, ruleDescr, consequenceStr, bindings);
}

Example 75 with RuleDescr

use of org.drools.compiler.lang.descr.RuleDescr in project drools by kiegroup.

the class KnowledgeBuilderTest method testPredicate.

@Test
public void testPredicate() throws Exception {
    final KnowledgeBuilderImpl builder = new KnowledgeBuilderImpl();
    final PackageDescr packageDescr = new PackageDescr("p1");
    final RuleDescr ruleDescr = new RuleDescr("rule-1");
    packageDescr.addRule(ruleDescr);
    final AndDescr lhs = new AndDescr();
    ruleDescr.setLhs(lhs);
    final PatternDescr pattern = new PatternDescr(Cheese.class.getName(), "stilton");
    lhs.addDescr(pattern);
    final BindingDescr fieldBindingDescr = new BindingDescr("x", "price");
    pattern.addConstraint(fieldBindingDescr);
    final BindingDescr fieldBindingDescr2 = new BindingDescr("y", "price");
    pattern.addConstraint(fieldBindingDescr2);
    packageDescr.addGlobal(new GlobalDescr("map", "java.util.Map"));
    final ExprConstraintDescr predicate = new ExprConstraintDescr("eval(( ( Integer )map.get( new Integer(x) )).intValue() == y)");
    pattern.addConstraint(predicate);
    ruleDescr.setConsequence("update(stilton);");
    builder.addPackage(packageDescr);
    assertLength(0, builder.getErrors().getErrors());
}