test/langtools/tools/javac/processing/model/util/elements/TestAllFoos.java

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/*
 * @test
 * @bug 8173945
 * @summary Test Elements.getAll{Type, Package, Module}Elements
 * @library /tools/javac/lib
 * @modules java.compiler
 *          jdk.compiler
 * @build   JavacTestingAbstractProcessor TestAllFoos
 * @compile -processor TestAllFoos -proc:only --release 8 --source-path modules/m1/pkg  modules/m1/pkg/C.java
 * @compile -processor TestAllFoos -proc:only --release 8 --source-path modules/m2/pkg  modules/m2/pkg/C.java
 */
// @compile -processor TestAllFoos -proc:only             --module-source-path  modules -m m1,m2

import java.util.Set;
import static java.util.Objects.*;
import javax.annotation.processing.*;
import static javax.lang.model.SourceVersion.*;
import javax.lang.model.element.*;
import javax.lang.model.util.*;

/**
 * Test basic workings of Elements.getAll{Type, Package, Module}Elements under
 * pre- and post-modules.
 */
public class TestAllFoos extends JavacTestingAbstractProcessor {
    public boolean process(Set<? extends TypeElement> annotations,
                           RoundEnvironment roundEnv) {
        if (!roundEnv.processingOver()) {
            boolean expectModules =
                (processingEnv.getSourceVersion().compareTo(RELEASE_9) >= 0);

            testSetSize(eltUtils.getAllTypeElements("java.lang.String"), 1);
            testSetSize(eltUtils.getAllTypeElements("example.com"), 0);

            if (!expectModules) {
                // Expect empty modules set, single package named "pkg" with one type "pkg.C".
                testSetSize(eltUtils.getAllModuleElements(), 0);
                testSetSize(eltUtils.getAllPackageElements("pkg"), 1);
                testSetSize(eltUtils.getAllTypeElements("pkg.C"),  1);
            } else {
                Set<? extends ModuleElement> modules =
                    requireNonNull(eltUtils.getAllModuleElements());

                ModuleElement m1 = requireNonNull(eltUtils.getModuleElement("m1"));
                ModuleElement m2 = requireNonNull(eltUtils.getModuleElement("m2"));

                if (!modules.contains(m1) ||
                    !modules.contains(m2) ||
                    !modules.contains(requireNonNull(eltUtils.getModuleElement("java.base"))))
                    throw new RuntimeException("Missing modules " + modules);

                // Expect two packages named "pkg" and two types named "pkg.C".
                testSetSize(eltUtils.getAllPackageElements("pkg"), 2);
                testSetSize(eltUtils.getAllTypeElements("pkg.C"),  2);
            }
        }
        return true;
    }

    /**
     * Check the set argument against null and throw an exception if
     * the set is not of the expected size.
     */
    private static <E> Set<E> testSetSize(Set<E> set, int expectedSize) {
        requireNonNull(set);
        if (set.size() != expectedSize)
            throw new RuntimeException("Unexpected size of set " + set);
        return set;
    }
}