1 /* 2 * Copyright (C) 2014 Google, Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package dagger.internal.codegen; 17 18 import com.google.common.collect.ImmutableSet; 19 import java.util.Set; 20 import javax.inject.Inject; 21 import javax.lang.model.element.AnnotationMirror; 22 import javax.lang.model.element.ExecutableElement; 23 import javax.lang.model.element.Modifier; 24 import javax.lang.model.element.VariableElement; 25 import javax.tools.Diagnostic.Kind; 26 27 import static dagger.internal.codegen.ErrorMessages.ABSTRACT_INJECT_METHOD; 28 import static dagger.internal.codegen.ErrorMessages.GENERIC_INJECT_METHOD; 29 import static dagger.internal.codegen.ErrorMessages.MULTIPLE_QUALIFIERS; 30 import static dagger.internal.codegen.ErrorMessages.PRIVATE_INJECT_METHOD; 31 import static dagger.internal.codegen.ErrorMessages.STATIC_INJECT_METHOD; 32 import static dagger.internal.codegen.InjectionAnnotations.getQualifiers; 33 import static javax.lang.model.element.Modifier.ABSTRACT; 34 import static javax.lang.model.element.Modifier.PRIVATE; 35 import static javax.lang.model.element.Modifier.STATIC; 36 37 /** 38 * A {@linkplain ValidationReport validator} for {@link Inject} methods. 39 * 40 * @author Gregory Kick 41 * @since 2.0 42 */ 43 final class InjectMethodValidator { 44 private Kind privateMemberValidationKind; 45 private Kind staticMemberValidationKind; 46 InjectMethodValidator( Kind privateMemberValidationKind, Kind staticMemberValidationKind)47 public InjectMethodValidator( 48 Kind privateMemberValidationKind, Kind staticMemberValidationKind) { 49 this.privateMemberValidationKind = privateMemberValidationKind; 50 this.staticMemberValidationKind = staticMemberValidationKind; 51 } 52 validate(ExecutableElement methodElement)53 ValidationReport<ExecutableElement> validate(ExecutableElement methodElement) { 54 ValidationReport.Builder<ExecutableElement> builder = ValidationReport.about(methodElement); 55 Set<Modifier> modifiers = methodElement.getModifiers(); 56 if (modifiers.contains(ABSTRACT)) { 57 builder.addError(ABSTRACT_INJECT_METHOD, methodElement); 58 } 59 60 if (modifiers.contains(PRIVATE)) { 61 builder.addItem(PRIVATE_INJECT_METHOD, privateMemberValidationKind, methodElement); 62 } 63 64 if (modifiers.contains(STATIC)) { 65 builder.addItem(STATIC_INJECT_METHOD, staticMemberValidationKind, methodElement); 66 } 67 68 if (!methodElement.getTypeParameters().isEmpty()) { 69 builder.addError(GENERIC_INJECT_METHOD, methodElement); 70 } 71 72 for (VariableElement parameter : methodElement.getParameters()) { 73 ImmutableSet<? extends AnnotationMirror> qualifiers = getQualifiers(parameter); 74 if (qualifiers.size() > 1) { 75 for (AnnotationMirror qualifier : qualifiers) { 76 builder.addError(MULTIPLE_QUALIFIERS, methodElement, qualifier); 77 } 78 } 79 } 80 81 return builder.build(); 82 } 83 } 84