Java example source code file (ErrorHandlingTest.java)

This example Java source code file (ErrorHandlingTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abstractmodule, annotation, bar, creationexception, exception, foo, goodscope, inject, integer, invalid, list, mymodule, object, string, tee, util

The ErrorHandlingTest.java Java example source code

/**
 * 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;

import static java.lang.annotation.RetentionPolicy.RUNTIME;

import com.google.inject.name.Named;
import com.google.inject.name.Names;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.util.List;

/**
 * @author crazybob@google.com (Bob Lee)
 */
public class ErrorHandlingTest {

  public static void main(String[] args) throws CreationException {
    try {
      Guice.createInjector(new MyModule());
    }
    catch (CreationException e) {
      e.printStackTrace();
      System.err.println("--");
    }

    Injector bad = Guice.createInjector(new AbstractModule() {
      protected void configure() {
        bind(String.class).toProvider(new Provider<String>() {
          public String get() {
            return null;
          }
        });
      }
    });
    try {
      bad.getInstance(String.class);
    }
    catch (Exception e) {
      e.printStackTrace();
      System.err.println("--");
    }
    try {
      bad.getInstance(NeedsString.class);
    }
    catch (Exception e) {
      e.printStackTrace();
      System.err.println("--");
    }
  }

  static class NeedsString {
    @Inject String mofo;
  }

  @Inject @Named("missing")
  static List<String> missing = null;

  static class Foo {
    @Inject
    public Foo(Runnable r) {}

    @Inject void setNames(List<String> names) {}
  }

  static class Bar {
    // Invalid constructor.
    Bar(String s) {}

    @Inject void setNumbers(@Named("numbers") List<Integer> numbers) {}

    @Inject void bar(@Named("foo") String s) {}
  }

  static class Tee {
    @Inject String s;

    @Inject void tee(String s, int i) {}

    @Inject Invalid invalid;
  }

  static class Invalid {
    Invalid(String s) {}
  }

  @SuppressWarnings("MoreThanOneScopeAnnotationOnClass") // suppress compiler error to test
  @Singleton 
  @GoodScope
  static class TooManyScopes {
  }

  @Target(ElementType.TYPE)
  @Retention(RUNTIME)
  @ScopeAnnotation
  @interface GoodScope {}

  @interface BadScope {}

  @ImplementedBy(String.class)
  interface I {}

  static class MyModule extends AbstractModule {
    protected void configure() {
      bind(Runnable.class);
      bind(Foo.class);
      bind(Bar.class);
      bind(Tee.class);
      bind(new TypeLiteral<List() {});
      bind(String.class).annotatedWith(Names.named("foo")).in(Named.class);
      bind(Key.get(Runnable.class)).to(Key.get(Runnable.class));
      bind(TooManyScopes.class);
      bindScope(BadScope.class, Scopes.SINGLETON);
      bind(Object.class).toInstance(new Object() {
        @Inject void foo() {
          throw new RuntimeException();
        }
      });
      requestStaticInjection(ErrorHandlingTest.class);

      addError("I don't like %s", "you");
      
      Object o = "2";
      try {
        Integer i = (Integer) o;
      } catch (Exception e) {
        addError(e);
      }

      bind(Module.class).toInstance(this);
      bind(I.class);
    }
  }
}