| /* |
| * Copyright (C) 2013 The Dagger Authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package dagger.internal.codegen.base; |
| |
| import static androidx.room.compiler.processing.compat.XConverters.toJavac; |
| import static com.google.auto.common.MoreElements.asExecutable; |
| import static java.util.stream.Collectors.joining; |
| |
| import androidx.room.compiler.processing.XElement; |
| import javax.inject.Inject; |
| import javax.lang.model.element.Element; |
| import javax.lang.model.element.ElementVisitor; |
| import javax.lang.model.element.ExecutableElement; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.element.VariableElement; |
| import javax.lang.model.util.ElementKindVisitor8; |
| |
| /** |
| * Formats elements into a useful string representation. |
| * |
| * <p>Elements directly enclosed by a type are preceded by the enclosing type's qualified name. |
| * |
| * <p>Parameters are given with their enclosing executable, with other parameters elided. |
| */ |
| public final class ElementFormatter extends Formatter<Element> { |
| @Inject |
| ElementFormatter() {} |
| |
| @Override |
| public String format(Element element) { |
| return elementToString(element); |
| } |
| |
| /** |
| * Returns a useful string form for an element. |
| * |
| * <p>Elements directly enclosed by a type are preceded by the enclosing type's qualified name. |
| * |
| * <p>Parameters are given with their enclosing executable, with other parameters elided. |
| */ |
| public static String elementToString(XElement element) { |
| return elementToString(toJavac(element)); |
| } |
| |
| /** |
| * Returns a useful string form for an element. |
| * |
| * <p>Elements directly enclosed by a type are preceded by the enclosing type's qualified name. |
| * |
| * <p>Parameters are given with their enclosing executable, with other parameters elided. |
| */ |
| public static String elementToString(Element element) { |
| return element.accept(ELEMENT_TO_STRING, null); |
| } |
| |
| private static final ElementVisitor<String, Void> ELEMENT_TO_STRING = |
| new ElementKindVisitor8<String, Void>() { |
| @Override |
| public String visitExecutable(ExecutableElement executableElement, Void aVoid) { |
| return enclosingTypeAndMemberName(executableElement) |
| .append( |
| executableElement.getParameters().stream() |
| .map(parameter -> parameter.asType().toString()) |
| .collect(joining(", ", "(", ")"))) |
| .toString(); |
| } |
| |
| @Override |
| public String visitVariableAsParameter(VariableElement parameter, Void aVoid) { |
| ExecutableElement methodOrConstructor = asExecutable(parameter.getEnclosingElement()); |
| return enclosingTypeAndMemberName(methodOrConstructor) |
| .append('(') |
| .append( |
| formatArgumentInList( |
| methodOrConstructor.getParameters().indexOf(parameter), |
| methodOrConstructor.getParameters().size(), |
| parameter.getSimpleName())) |
| .append(')') |
| .toString(); |
| } |
| |
| @Override |
| public String visitVariableAsField(VariableElement field, Void aVoid) { |
| return enclosingTypeAndMemberName(field).toString(); |
| } |
| |
| @Override |
| public String visitType(TypeElement type, Void aVoid) { |
| return type.getQualifiedName().toString(); |
| } |
| |
| @Override |
| protected String defaultAction(Element element, Void aVoid) { |
| throw new UnsupportedOperationException( |
| "Can't determine string for " + element.getKind() + " element " + element); |
| } |
| |
| private StringBuilder enclosingTypeAndMemberName(Element element) { |
| StringBuilder name = new StringBuilder(element.getEnclosingElement().accept(this, null)); |
| if (!element.getSimpleName().contentEquals("<init>")) { |
| name.append('.').append(element.getSimpleName()); |
| } |
| return name; |
| } |
| }; |
| } |