diff options
Diffstat (limited to 'common/src/main/java/com/google/auto/common/SuperficialValidation.java')
-rw-r--r-- | common/src/main/java/com/google/auto/common/SuperficialValidation.java | 56 |
1 files changed, 29 insertions, 27 deletions
diff --git a/common/src/main/java/com/google/auto/common/SuperficialValidation.java b/common/src/main/java/com/google/auto/common/SuperficialValidation.java index dddb1be9..5ef4dbf2 100644 --- a/common/src/main/java/com/google/auto/common/SuperficialValidation.java +++ b/common/src/main/java/com/google/auto/common/SuperficialValidation.java @@ -17,6 +17,7 @@ package com.google.auto.common; import java.util.List; import java.util.Map; +import java.util.stream.StreamSupport; import javax.lang.model.element.AnnotationMirror; import javax.lang.model.element.AnnotationValue; import javax.lang.model.element.AnnotationValueVisitor; @@ -46,13 +47,12 @@ import javax.lang.model.util.SimpleTypeVisitor8; * @author Gregory Kick */ public final class SuperficialValidation { + /** + * Returns true if all of the given elements return true from {@link #validateElement(Element)}. + */ public static boolean validateElements(Iterable<? extends Element> elements) { - for (Element element : elements) { - if (!validateElement(element)) { - return false; - } - } - return true; + return StreamSupport.stream(elements.spliterator(), false) + .allMatch(SuperficialValidation::validateElement); } private static final ElementVisitor<Boolean, Void> ELEMENT_VALIDATING_VISITOR = @@ -94,6 +94,12 @@ public final class SuperficialValidation { } }; + /** + * Returns true if all types referenced by the given element are defined. The exact meaning of + * this depends on the kind of element. For packages, it means that all annotations on the package + * are fully defined. For other element kinds, it means that types referenced by the element, + * anything it contains, and any of its annotations element are all defined. + */ public static boolean validateElement(Element element) { return element.accept(ELEMENT_VALIDATING_VISITOR, null); } @@ -163,7 +169,13 @@ public final class SuperficialValidation { } }; - private static boolean validateType(TypeMirror type) { + /** + * Returns true if the given type is fully defined. This means that the type itself is defined, as + * are any types it references, such as any type arguments or type bounds. For an {@link + * ExecutableType}, the parameter and return types must be fully defined, as must types declared + * in a {@code throws} clause or in the bounds of any type parameters. + */ + public static boolean validateType(TypeMirror type) { return type.accept(TYPE_VALIDATING_VISITOR, null); } @@ -182,17 +194,14 @@ public final class SuperficialValidation { && validateAnnotationValues(annotationMirror.getElementValues()); } - @SuppressWarnings("unused") private static boolean validateAnnotationValues( Map<? extends ExecutableElement, ? extends AnnotationValue> valueMap) { - for (Map.Entry<? extends ExecutableElement, ? extends AnnotationValue> valueEntry : - valueMap.entrySet()) { - TypeMirror expectedType = valueEntry.getKey().getReturnType(); - if (!validateAnnotationValue(valueEntry.getValue(), expectedType)) { - return false; - } - } - return true; + return valueMap.entrySet().stream() + .allMatch( + valueEntry -> { + TypeMirror expectedType = valueEntry.getKey().getReturnType(); + return validateAnnotationValue(valueEntry.getValue(), expectedType); + }); } private static final AnnotationValueVisitor<Boolean, TypeMirror> VALUE_VALIDATING_VISITOR = @@ -216,17 +225,8 @@ public final class SuperficialValidation { if (!expectedType.getKind().equals(TypeKind.ARRAY)) { return false; } - try { - expectedType = MoreTypes.asArray(expectedType).getComponentType(); - } catch (IllegalArgumentException e) { - return false; // Not an array expected, ergo invalid. - } - for (AnnotationValue value : values) { - if (!value.accept(this, expectedType)) { - return false; - } - } - return true; + TypeMirror componentType = MoreTypes.asArray(expectedType).getComponentType(); + return values.stream().allMatch(value -> value.accept(this, componentType)); } @Override @@ -280,4 +280,6 @@ public final class SuperficialValidation { AnnotationValue annotationValue, TypeMirror expectedType) { return annotationValue.accept(VALUE_VALIDATING_VISITOR, expectedType); } + + private SuperficialValidation() {} } |