| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * 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 android.databinding.annotationprocessor; |
| |
| import android.databinding.BindingBuildInfo; |
| import android.databinding.tool.processing.ScopedException; |
| import android.databinding.tool.util.L; |
| import android.databinding.tool.util.Preconditions; |
| |
| import java.lang.annotation.Annotation; |
| |
| import javax.annotation.processing.RoundEnvironment; |
| import javax.lang.model.element.Element; |
| |
| public class BuildInfoUtil { |
| private static BindingBuildInfo sCached; |
| public static BindingBuildInfo load(RoundEnvironment roundEnvironment) { |
| if (sCached == null) { |
| sCached = extractNotNull(roundEnvironment, BindingBuildInfo.class); |
| if (sCached != null) { |
| L.setDebugLog(sCached.enableDebugLogs()); |
| ScopedException.encodeOutput(sCached.printEncodedError()); |
| } |
| } |
| return sCached; |
| } |
| |
| private static <T extends Annotation> T extractNotNull(RoundEnvironment roundEnv, |
| Class<T> annotationClass) { |
| T result = null; |
| for (Element element : roundEnv.getElementsAnnotatedWith(annotationClass)) { |
| final T info = element.getAnnotation(annotationClass); |
| if (info == null) { |
| continue; // It gets confused between BindingAppInfo and BinderBundle |
| } |
| Preconditions.check(result == null, "Should have only one %s", |
| annotationClass.getCanonicalName()); |
| result = info; |
| } |
| return result; |
| } |
| } |