| /** |
| * Copyright (C) 2006 Google Inc. |
| * |
| * 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 com.google.inject.spi; |
| |
| import com.google.inject.AbstractModule; |
| import com.google.inject.ContainerBuilder; |
| |
| import java.util.Set; |
| import java.util.HashSet; |
| import java.util.Arrays; |
| |
| /** |
| * A source provider which returns {@code ContainerBuilder}'s caller's {@code |
| * StackTraceElement}. |
| * |
| * @author crazybob@google.com (Bob Lee) |
| */ |
| public class DefaultSourceProvider implements SourceProvider { |
| |
| final Set<String> skippedClassNames = new HashSet<String>(Arrays.asList( |
| ContainerBuilder.class.getName(), |
| AbstractModule.class.getName(), |
| DefaultSourceProvider.class.getName(), |
| SourceConsumer.class.getName() |
| )); |
| |
| /** |
| * Instructs the provider to skip the given class in the stack trace when |
| * determining the source. Use this to keep the container builder from |
| * logging utility methods as the sources of bindings (i.e. it will skip to |
| * the utility methods' callers instead). |
| * |
| * <p>Skipping only takes place after this method is called. |
| */ |
| public void skip(Class<?> clazz) { |
| skippedClassNames.add(clazz.getName()); |
| } |
| |
| public Object source() { |
| // Search up the stack until we find a class outside of this one. |
| for (final StackTraceElement element : new Throwable().getStackTrace()) { |
| String className = element.getClassName(); |
| if (!skippedClassNames.contains(className)) { |
| return element; |
| } |
| } |
| throw new AssertionError(); |
| } |
| } |