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Example 1 with InterpretableCall

use of org.projectnessie.cel.interpreter.Interpretable.InterpretableCall in project cel-java by projectnessie.

the class CELTest method CustomInterpreterDecorator.

@Test
void CustomInterpreterDecorator() {
    AtomicReference<Interpretable> lastInstruction = new AtomicReference<>();
    InterpretableDecorator optimizeArith = i -> {
        lastInstruction.set(i);
        // Only optimize the instruction if it is a call.
        if (!(i instanceof InterpretableCall)) {
            return i;
        }
        InterpretableCall call = (InterpretableCall) i;
        // Only optimize the math functions when they have constant arguments.
        switch(call.function()) {
            case "_+_":
            case "_-_":
            case "_*_":
            case "_/_":
                // These are all binary operators so they should have to arguments
                Interpretable[] args = call.args();
                // an empty activation and the value returns as a constant.
                if (!(args[0] instanceof InterpretableConst) || !(args[1] instanceof InterpretableConst)) {
                    return i;
                }
                Val val = call.eval(emptyActivation());
                if (isError(val)) {
                    throw new RuntimeException(val.toString());
                }
                return newConstValue(call.id(), val);
            default:
                return i;
        }
    };
    Env env = newEnv(declarations(Decls.newVar("foo", Decls.Int)));
    AstIssuesTuple astIss = env.compile("foo == -1 + 2 * 3 / 3");
    env.program(astIss.getAst(), evalOptions(OptPartialEval), customDecorator(optimizeArith));
    assertThat(lastInstruction.get()).isInstanceOf(InterpretableCall.class);
    InterpretableCall call = (InterpretableCall) lastInstruction.get();
    Interpretable[] args = call.args();
    Interpretable lhs = args[0];
    assertThat(lhs).isInstanceOf(InterpretableAttribute.class);
    InterpretableAttribute lastAttr = (InterpretableAttribute) lhs;
    NamespacedAttribute absAttr = (NamespacedAttribute) lastAttr.attr();
    String[] varNames = absAttr.candidateVariableNames();
    assertThat(varNames).containsExactly("foo");
    Interpretable rhs = args[1];
    assertThat(rhs).isInstanceOf(InterpretableConst.class);
    InterpretableConst lastConst = (InterpretableConst) rhs;
    // This is the last number produced by the optimization.
    assertThat(lastConst.value()).isSameAs(IntOne);
}
Also used : BoolT(org.projectnessie.cel.common.types.BoolT) Interpretable(org.projectnessie.cel.interpreter.Interpretable) Macro(org.projectnessie.cel.parser.Macro) Call(com.google.api.expr.v1alpha1.Expr.Call) Assertions.assertThat(org.assertj.core.api.Assertions.assertThat) PartialActivation(org.projectnessie.cel.interpreter.Activation.PartialActivation) EnvOption.container(org.projectnessie.cel.EnvOption.container) Macro.newReceiverMacro(org.projectnessie.cel.parser.Macro.newReceiverMacro) Activation.emptyActivation(org.projectnessie.cel.interpreter.Activation.emptyActivation) Disabled(org.junit.jupiter.api.Disabled) InterpretableDecorator(org.projectnessie.cel.interpreter.InterpretableDecorator) Collections.singletonList(java.util.Collections.singletonList) True(org.projectnessie.cel.common.types.BoolT.True) Err.isError(org.projectnessie.cel.common.types.Err.isError) Container(org.projectnessie.cel.common.types.traits.Container) Arrays.asList(java.util.Arrays.asList) 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Aggregations

CheckedExpr (com.google.api.expr.v1alpha1.CheckedExpr)1 Expr (com.google.api.expr.v1alpha1.Expr)1 Call (com.google.api.expr.v1alpha1.Expr.Call)1 Ident (com.google.api.expr.v1alpha1.Expr.Ident)1 ParsedExpr (com.google.api.expr.v1alpha1.ParsedExpr)1 Type (com.google.api.expr.v1alpha1.Type)1 Arrays.asList (java.util.Arrays.asList)1 Collections.emptyList (java.util.Collections.emptyList)1 Collections.emptyMap (java.util.Collections.emptyMap)1 Collections.singletonList (java.util.Collections.singletonList)1 CompletableFuture (java.util.concurrent.CompletableFuture)1 ExecutorService (java.util.concurrent.ExecutorService)1 Executors (java.util.concurrent.Executors)1 TimeUnit (java.util.concurrent.TimeUnit)1 AtomicReference (java.util.concurrent.atomic.AtomicReference)1 Consumer (java.util.function.Consumer)1 IntStream (java.util.stream.IntStream)1 Assertions.assertThat (org.assertj.core.api.Assertions.assertThat)1 Assertions.assertThatThrownBy (org.assertj.core.api.Assertions.assertThatThrownBy)1 Disabled (org.junit.jupiter.api.Disabled)1