diff options
Diffstat (limited to 'src/core/lombok')
| -rw-r--r-- | src/core/lombok/eclipse/handlers/HandleExtensionMethod.java | 57 | ||||
| -rw-r--r-- | src/core/lombok/experimental/ExtensionMethod.java | 4 |
2 files changed, 61 insertions, 0 deletions
diff --git a/src/core/lombok/eclipse/handlers/HandleExtensionMethod.java b/src/core/lombok/eclipse/handlers/HandleExtensionMethod.java new file mode 100644 index 00000000..30408118 --- /dev/null +++ b/src/core/lombok/eclipse/handlers/HandleExtensionMethod.java @@ -0,0 +1,57 @@ +/* + * Copyright (C) 2012 The Project Lombok Authors. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +package lombok.eclipse.handlers; + +import java.util.List; + +import org.eclipse.jdt.internal.compiler.ast.Annotation; +import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration; +import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants; + +import lombok.core.AnnotationValues; +import lombok.eclipse.EclipseAnnotationHandler; +import lombok.eclipse.EclipseNode; +import lombok.experimental.ExtensionMethod; + +// This handler just does some additional error checking; the real work is done in the agent. +public class HandleExtensionMethod extends EclipseAnnotationHandler<ExtensionMethod> { + @Override public void handle(AnnotationValues<ExtensionMethod> annotation, Annotation ast, EclipseNode annotationNode) { + TypeDeclaration typeDecl = null; + EclipseNode owner = annotationNode.up(); + if (owner.get() instanceof TypeDeclaration) typeDecl = (TypeDeclaration) owner.get(); + int modifiers = typeDecl == null ? 0 : typeDecl.modifiers; + + boolean notAClass = (modifiers & + (ClassFileConstants.AccInterface | ClassFileConstants.AccAnnotation)) != 0; + + if (typeDecl == null || notAClass) { + annotationNode.addError("@ExtensionMethod is legal only on classes and enums."); + return; + } + + List<Object> listenerInterfaces = annotation.getActualExpressions("value"); + if (listenerInterfaces.isEmpty()) { + annotationNode.addWarning(String.format("@ExtensionMethod has no effect since no extension types were specified.")); + return; + } + } +} diff --git a/src/core/lombok/experimental/ExtensionMethod.java b/src/core/lombok/experimental/ExtensionMethod.java index b25e535e..a9eaa6b7 100644 --- a/src/core/lombok/experimental/ExtensionMethod.java +++ b/src/core/lombok/experimental/ExtensionMethod.java @@ -60,5 +60,9 @@ public @interface ExtensionMethod { /** All types whose static methods will be exposed as extension methods. */ Class<?>[] value(); + /** + * If {@code true}, an applicable extension method is used (if found) even if the method call already was compilable (this is the default). + * If {@code false}, an extension method is only used if the method call is not also defined by the type itself. + */ boolean suppressBaseMethods() default true; } |