Examples with Constant com.google.api.expr.v1alpha1.Constant used on opensource projects

Example 6 with Constant

use of com.google.api.expr.v1alpha1.Constant in project cel-java by projectnessie.

the class Env method residualAst.

/**
 * ResidualAst takes an Ast and its EvalDetails to produce a new Ast which only contains the
 * attribute references which are unknown.
 *
 * <p>Residual expressions are beneficial in a few scenarios:
 *
 * <ul>
 *   <li>Optimizing constant expression evaluations away.
 *   <li>Indexing and pruning expressions based on known input arguments.
 *   <li>Surfacing additional requirements that are needed in order to complete an evaluation.
 *   <li>Sharing the evaluation of an expression across multiple machines/nodes.
 * </ul>
 *
 * <p>For example, if an expression targets a 'resource' and 'request' attribute and the possible
 * values for the resource are known, a PartialActivation could mark the 'request' as an unknown
 * interpreter.AttributePattern and the resulting ResidualAst would be reduced to only the parts
 * of the expression that reference the 'request'.
 *
 * <p>Note, the expression ids within the residual AST generated through this method have no
 * correlation to the expression ids of the original AST.
 *
 * <p>See the PartialVars helper for how to construct a PartialActivation.
 *
 * <p>TODO: Consider adding an option to generate a Program.Residual to avoid round-tripping to an
 * Ast format and then Program again.
 */
public Ast residualAst(Ast a, EvalDetails details) {
    Expr pruned = pruneAst(a.getExpr(), details.getState());
    String expr = astToString(parsedExprToAst(ParsedExpr.newBuilder().setExpr(pruned).build()));
    AstIssuesTuple parsedIss = parse(expr);
    if (parsedIss.hasIssues()) {
        throw parsedIss.getIssues().err();
    }
    if (!a.isChecked()) {
        return parsedIss.ast;
    }
    AstIssuesTuple checkedIss = check(parsedIss.ast);
    if (checkedIss.hasIssues()) {
        throw checkedIss.getIssues().err();
    }
    return checkedIss.ast;
}

Example 7 with Constant

use of com.google.api.expr.v1alpha1.Constant in project cel-java by projectnessie.

the class ProviderTest method typeRegistryNewValue_OneofFields.

@Test
void typeRegistryNewValue_OneofFields() {
    TypeRegistry reg = newRegistry(CheckedExpr.getDefaultInstance(), ParsedExpr.getDefaultInstance());
    Val exp = reg.newValue("google.api.expr.v1alpha1.CheckedExpr", mapOf("expr", reg.newValue("google.api.expr.v1alpha1.Expr", mapOf("const_expr", reg.newValue("google.api.expr.v1alpha1.Constant", mapOf("string_value", stringOf("oneof")))))));
    assertThat(exp).matches(v -> !Err.isError(v));
    CheckedExpr ce = exp.convertToNative(CheckedExpr.class);
    assertThat(ce).extracting(CheckedExpr::getExpr).extracting(Expr::getConstExpr).extracting(Constant::getStringValue).isEqualTo("oneof");
}