| /** |
| * Copyright (C) 2010 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.multibindings; |
| |
| import static com.google.common.collect.Iterables.getOnlyElement; |
| import static com.google.inject.multibindings.MapBinder.entryOfProviderOf; |
| import static com.google.inject.multibindings.MapBinder.mapOf; |
| import static com.google.inject.multibindings.MapBinder.mapOfJavaxProviderOf; |
| import static com.google.inject.multibindings.MapBinder.mapOfProviderOf; |
| import static com.google.inject.multibindings.MapBinder.mapOfSetOfProviderOf; |
| import static com.google.inject.multibindings.Multibinder.setOf; |
| import static com.google.inject.multibindings.OptionalBinder.optionalOfJavaxProvider; |
| import static com.google.inject.multibindings.OptionalBinder.optionalOfProvider; |
| import static com.google.inject.multibindings.SpiUtils.BindType.INSTANCE; |
| import static com.google.inject.multibindings.SpiUtils.BindType.LINKED; |
| import static com.google.inject.multibindings.SpiUtils.BindType.PROVIDER_INSTANCE; |
| import static com.google.inject.multibindings.SpiUtils.BindType.PROVIDER_KEY; |
| import static com.google.inject.multibindings.SpiUtils.VisitType.BOTH; |
| import static com.google.inject.multibindings.SpiUtils.VisitType.INJECTOR; |
| import static com.google.inject.multibindings.SpiUtils.VisitType.MODULE; |
| import static junit.framework.Assert.assertEquals; |
| import static junit.framework.Assert.assertNotNull; |
| import static junit.framework.Assert.assertNull; |
| import static junit.framework.Assert.assertTrue; |
| import static junit.framework.Assert.fail; |
| |
| import com.google.common.base.Objects; |
| import com.google.common.base.Optional; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Lists; |
| import com.google.inject.Binding; |
| import com.google.inject.Guice; |
| import com.google.inject.Injector; |
| import com.google.inject.Key; |
| import com.google.inject.Module; |
| import com.google.inject.Provider; |
| import com.google.inject.TypeLiteral; |
| import com.google.inject.multibindings.OptionalBinder.Source; |
| import com.google.inject.spi.DefaultBindingTargetVisitor; |
| import com.google.inject.spi.Element; |
| import com.google.inject.spi.Elements; |
| import com.google.inject.spi.HasDependencies; |
| import com.google.inject.spi.InstanceBinding; |
| import com.google.inject.spi.LinkedKeyBinding; |
| import com.google.inject.spi.ProviderInstanceBinding; |
| import com.google.inject.spi.ProviderKeyBinding; |
| import com.google.inject.spi.ProviderLookup; |
| |
| import java.lang.reflect.ParameterizedType; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * Utilities for testing the Multibinder & MapBinder extension SPI. |
| * |
| * @author sameb@google.com (Sam Berlin) |
| */ |
| public class SpiUtils { |
| |
| /** The kind of test we should perform. A live Injector, a raw Elements (Module) test, or both. */ |
| enum VisitType { INJECTOR, MODULE, BOTH } |
| |
| /** |
| * Asserts that MapBinderBinding visitors for work correctly. |
| * |
| * @param <T> The type of the binding |
| * @param mapKey The key the map belongs to. |
| * @param keyType the TypeLiteral of the key of the map |
| * @param valueType the TypeLiteral of the value of the map |
| * @param modules The modules that define the mapbindings |
| * @param visitType The kind of test we should perform. A live Injector, a raw Elements (Module) test, or both. |
| * @param allowDuplicates If duplicates are allowed. |
| * @param expectedMapBindings The number of other mapbinders we expect to see. |
| * @param results The kind of bindings contained in the mapbinder. |
| */ |
| static <T> void assertMapVisitor(Key<T> mapKey, TypeLiteral<?> keyType, TypeLiteral<?> valueType, |
| Iterable<? extends Module> modules, VisitType visitType, boolean allowDuplicates, |
| int expectedMapBindings, MapResult... results) { |
| if(visitType == null) { |
| fail("must test something"); |
| } |
| |
| if (visitType == BOTH || visitType == INJECTOR) { |
| mapInjectorTest(mapKey, keyType, valueType, modules, allowDuplicates, expectedMapBindings, |
| results); |
| } |
| |
| if (visitType == BOTH || visitType == MODULE) { |
| mapModuleTest(mapKey, keyType, valueType, modules, allowDuplicates, expectedMapBindings, |
| results); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static <T> void mapInjectorTest(Key<T> mapKey, TypeLiteral<?> keyType, |
| TypeLiteral<?> valueType, Iterable<? extends Module> modules, boolean allowDuplicates, |
| int expectedMapBindings, MapResult... results) { |
| Injector injector = Guice.createInjector(modules); |
| Visitor<T> visitor = new Visitor<T>(); |
| Binding<T> mapBinding = injector.getBinding(mapKey); |
| MapBinderBinding<T> mapbinder = (MapBinderBinding<T>)mapBinding.acceptTargetVisitor(visitor); |
| assertNotNull(mapbinder); |
| assertEquals(keyType, mapbinder.getKeyTypeLiteral()); |
| assertEquals(valueType, mapbinder.getValueTypeLiteral()); |
| assertEquals(allowDuplicates, mapbinder.permitsDuplicates()); |
| List<Map.Entry<?, Binding<?>>> entries = Lists.newArrayList(mapbinder.getEntries()); |
| List<MapResult> mapResults = Lists.newArrayList(results); |
| assertEquals("wrong entries, expected: " + mapResults + ", but was: " + entries, |
| mapResults.size(), entries.size()); |
| |
| for(MapResult result : mapResults) { |
| Map.Entry<?, Binding<?>> found = null; |
| for(Map.Entry<?, Binding<?>> entry : entries) { |
| Object key = entry.getKey(); |
| Binding<?> value = entry.getValue(); |
| if(key.equals(result.k) && matches(value, result.v)) { |
| found = entry; |
| break; |
| } |
| } |
| if(found == null) { |
| fail("Could not find entry: " + result + " in remaining entries: " + entries); |
| } else { |
| assertTrue("mapBinder doesn't contain: " + found.getValue(), |
| mapbinder.containsElement(found.getValue())); |
| entries.remove(found); |
| } |
| } |
| |
| if(!entries.isEmpty()) { |
| fail("Found all entries of: " + mapResults + ", but more were left over: " + entries); |
| } |
| |
| Key<?> mapOfJavaxProvider = mapKey.ofType(mapOfJavaxProviderOf(keyType, valueType)); |
| Key<?> mapOfProvider = mapKey.ofType(mapOfProviderOf(keyType, valueType)); |
| Key<?> mapOfSetOfProvider = mapKey.ofType(mapOfSetOfProviderOf(keyType, valueType)); |
| Key<?> mapOfSet = mapKey.ofType(mapOf(keyType, setOf(valueType))); |
| Key<?> setOfEntry = mapKey.ofType(setOf(entryOfProviderOf(keyType, valueType))); |
| boolean entrySetMatch = false; |
| boolean mapJavaxProviderMatch = false; |
| boolean mapProviderMatch = false; |
| boolean mapSetMatch = false; |
| boolean mapSetProviderMatch = false; |
| List<Object> otherMapBindings = Lists.newArrayList(); |
| List<Binding> otherMatches = Lists.newArrayList(); |
| for(Binding b : injector.getAllBindings().values()) { |
| boolean contains = mapbinder.containsElement(b); |
| Object visited = b.acceptTargetVisitor(visitor); |
| if(visited instanceof MapBinderBinding) { |
| if(visited.equals(mapbinder)) { |
| assertTrue(contains); |
| } else { |
| otherMapBindings.add(visited); |
| } |
| } else if(b.getKey().equals(mapOfProvider)) { |
| assertTrue(contains); |
| mapProviderMatch = true; |
| } else if (b.getKey().equals(mapOfJavaxProvider)) { |
| assertTrue(contains); |
| mapJavaxProviderMatch = true; |
| } else if(b.getKey().equals(mapOfSet)) { |
| assertTrue(contains); |
| mapSetMatch = true; |
| } else if(b.getKey().equals(mapOfSetOfProvider)) { |
| assertTrue(contains); |
| mapSetProviderMatch = true; |
| } else if(b.getKey().equals(setOfEntry)) { |
| assertTrue(contains); |
| entrySetMatch = true; |
| // Validate that this binding is also a MultibinderBinding. |
| assertTrue(b.acceptTargetVisitor(visitor) instanceof MultibinderBinding); |
| } else if (contains) { |
| otherMatches.add(b); |
| } |
| } |
| |
| int sizeOfOther = otherMatches.size(); |
| if(allowDuplicates) { |
| sizeOfOther--; // account for 1 duplicate binding |
| } |
| sizeOfOther = sizeOfOther / 2; // account for 1 value & 1 Map.Entry of each expected binding. |
| assertEquals("Incorrect other matches: " + otherMatches, mapResults.size(), sizeOfOther); |
| assertTrue(entrySetMatch); |
| assertTrue(mapProviderMatch); |
| assertTrue(mapJavaxProviderMatch); |
| assertEquals(allowDuplicates, mapSetMatch); |
| assertEquals(allowDuplicates, mapSetProviderMatch); |
| assertEquals("other MapBindings found: " + otherMapBindings, expectedMapBindings, |
| otherMapBindings.size()); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static <T> void mapModuleTest(Key<T> mapKey, TypeLiteral<?> keyType, |
| TypeLiteral<?> valueType, Iterable<? extends Module> modules, boolean allowDuplicates, |
| int expectedMapBindings, MapResult... results) { |
| Set<Element> elements = ImmutableSet.copyOf(Elements.getElements(modules)); |
| Visitor<T> visitor = new Visitor<T>(); |
| MapBinderBinding<T> mapbinder = null; |
| for(Element element : elements) { |
| if(element instanceof Binding && ((Binding)element).getKey().equals(mapKey)) { |
| mapbinder = (MapBinderBinding<T>)((Binding)element).acceptTargetVisitor(visitor); |
| break; |
| } |
| } |
| assertNotNull(mapbinder); |
| |
| assertEquals(keyType, mapbinder.getKeyTypeLiteral()); |
| assertEquals(valueType, mapbinder.getValueTypeLiteral()); |
| List<MapResult> mapResults = Lists.newArrayList(results); |
| |
| Key<?> mapOfProvider = mapKey.ofType(mapOfProviderOf(keyType, valueType)); |
| Key<?> mapOfSetOfProvider = mapKey.ofType(mapOfSetOfProviderOf(keyType, valueType)); |
| Key<?> mapOfSet = mapKey.ofType(mapOf(keyType, setOf(valueType))); |
| Key<?> setOfEntry = mapKey.ofType(setOf(entryOfProviderOf(keyType, valueType))); |
| boolean entrySetMatch = false; |
| boolean mapProviderMatch = false; |
| boolean mapSetMatch = false; |
| boolean mapSetProviderMatch = false; |
| List<Object> otherMapBindings = Lists.newArrayList(); |
| List<Element> otherMatches = Lists.newArrayList(); |
| List<Element> otherElements = Lists.newArrayList(); |
| for(Element element : elements) { |
| boolean contains = mapbinder.containsElement(element); |
| if(!contains) { |
| otherElements.add(element); |
| } |
| boolean matched = false; |
| Key key = null; |
| Binding b = null; |
| if(element instanceof Binding) { |
| b = (Binding)element; |
| key = b.getKey(); |
| Object visited = b.acceptTargetVisitor(visitor); |
| if(visited instanceof MapBinderBinding) { |
| matched = true; |
| if(visited.equals(mapbinder)) { |
| assertTrue(contains); |
| } else { |
| otherMapBindings.add(visited); |
| } |
| } |
| } else if(element instanceof ProviderLookup) { |
| key = ((ProviderLookup)element).getKey(); |
| } |
| |
| if(!matched && key != null) { |
| if(key.equals(mapOfProvider)) { |
| matched = true; |
| assertTrue(contains); |
| mapProviderMatch = true; |
| } else if(key.equals(mapOfSet)) { |
| matched = true; |
| assertTrue(contains); |
| mapSetMatch = true; |
| } else if(key.equals(mapOfSetOfProvider)) { |
| matched = true; |
| assertTrue(contains); |
| mapSetProviderMatch = true; |
| } else if(key.equals(setOfEntry)) { |
| matched = true; |
| assertTrue(contains); |
| entrySetMatch = true; |
| // Validate that this binding is also a MultibinderBinding. |
| if(b != null) { |
| assertTrue(b.acceptTargetVisitor(visitor) instanceof MultibinderBinding); |
| } |
| } |
| } |
| |
| if(!matched && contains) { |
| otherMatches.add(element); |
| } |
| } |
| |
| int otherMatchesSize = otherMatches.size(); |
| if(allowDuplicates) { |
| otherMatchesSize--; // allow for 1 duplicate binding |
| } |
| otherMatchesSize = otherMatchesSize / 3; // value, ProviderLookup per value, Map.Entry per value |
| assertEquals("incorrect number of contains, leftover matches: " + otherMatches, mapResults |
| .size(), otherMatchesSize); |
| |
| assertTrue(entrySetMatch); |
| assertTrue(mapProviderMatch); |
| assertEquals(allowDuplicates, mapSetMatch); |
| assertEquals(allowDuplicates, mapSetProviderMatch); |
| assertEquals("other MapBindings found: " + otherMapBindings, expectedMapBindings, |
| otherMapBindings.size()); |
| |
| // Validate that we can construct an injector out of the remaining bindings. |
| Guice.createInjector(Elements.getModule(otherElements)); |
| } |
| |
| /** |
| * Asserts that MultibinderBinding visitors work correctly. |
| * |
| * @param <T> The type of the binding |
| * @param setKey The key the set belongs to. |
| * @param elementType the TypeLiteral of the element |
| * @param modules The modules that define the multibindings |
| * @param visitType The kind of test we should perform. A live Injector, a raw Elements (Module) test, or both. |
| * @param allowDuplicates If duplicates are allowed. |
| * @param expectedMultibindings The number of other multibinders we expect to see. |
| * @param results The kind of bindings contained in the multibinder. |
| */ |
| static <T> void assertSetVisitor(Key<T> setKey, TypeLiteral<?> elementType, |
| Iterable<? extends Module> modules, VisitType visitType, boolean allowDuplicates, |
| int expectedMultibindings, BindResult... results) { |
| if(visitType == null) { |
| fail("must test something"); |
| } |
| |
| if(visitType == BOTH || visitType == INJECTOR) { |
| setInjectorTest(setKey, elementType, modules, allowDuplicates, expectedMultibindings, results); |
| } |
| |
| if(visitType == BOTH || visitType == MODULE) { |
| setModuleTest(setKey, elementType, modules, allowDuplicates, expectedMultibindings, results); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static <T> void setInjectorTest(Key<T> setKey, TypeLiteral<?> elementType, |
| Iterable<? extends Module> modules, boolean allowDuplicates, int otherMultibindings, |
| BindResult... results) { |
| Injector injector = Guice.createInjector(modules); |
| Visitor<T> visitor = new Visitor<T>(); |
| Binding<T> binding = injector.getBinding(setKey); |
| MultibinderBinding<T> multibinder = (MultibinderBinding<T>)binding.acceptTargetVisitor(visitor); |
| assertNotNull(multibinder); |
| assertEquals(elementType, multibinder.getElementTypeLiteral()); |
| assertEquals(allowDuplicates, multibinder.permitsDuplicates()); |
| List<Binding<?>> elements = Lists.newArrayList(multibinder.getElements()); |
| List<BindResult> bindResults = Lists.newArrayList(results); |
| assertEquals("wrong bind elements, expected: " + bindResults + ", but was: " + multibinder.getElements(), |
| bindResults.size(), elements.size()); |
| |
| for(BindResult result : bindResults) { |
| Binding found = null; |
| for(Binding item : elements) { |
| if (matches(item, result)) { |
| found = item; |
| break; |
| } |
| } |
| if(found == null) { |
| fail("Could not find element: " + result + " in remaining elements: " + elements); |
| } else { |
| elements.remove(found); |
| } |
| } |
| |
| if(!elements.isEmpty()) { |
| fail("Found all elements of: " + bindResults + ", but more were left over: " + elements); |
| } |
| |
| Set<Binding> setOfElements = new HashSet<Binding>(multibinder.getElements()); |
| |
| List<Object> otherMultibinders = Lists.newArrayList(); |
| List<Binding> otherContains = Lists.newArrayList(); |
| for(Binding b : injector.getAllBindings().values()) { |
| boolean contains = multibinder.containsElement(b); |
| Object visited = b.acceptTargetVisitor(visitor); |
| if(visited != null) { |
| if(visited.equals(multibinder)) { |
| assertTrue(contains); |
| } else { |
| otherMultibinders.add(visited); |
| } |
| } else if(setOfElements.contains(b)) { |
| assertTrue(contains); |
| } else if(contains) { |
| otherContains.add(b); |
| } |
| } |
| |
| if(allowDuplicates) { |
| assertEquals("contained more than it should: " + otherContains, 1, otherContains.size()); |
| } else { |
| assertTrue("contained more than it should: " + otherContains, otherContains.isEmpty()); |
| } |
| assertEquals("other multibindings found: " + otherMultibinders, otherMultibindings, |
| otherMultibinders.size()); |
| |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static <T> void setModuleTest(Key<T> setKey, TypeLiteral<?> elementType, |
| Iterable<? extends Module> modules, boolean allowDuplicates, int otherMultibindings, |
| BindResult... results) { |
| List<BindResult> bindResults = Lists.newArrayList(results); |
| List<Element> elements = Elements.getElements(modules); |
| Visitor<T> visitor = new Visitor<T>(); |
| MultibinderBinding<T> multibinder = null; |
| for(Element element : elements) { |
| if(element instanceof Binding && ((Binding)element).getKey().equals(setKey)) { |
| multibinder = (MultibinderBinding<T>)((Binding)element).acceptTargetVisitor(visitor); |
| break; |
| } |
| } |
| assertNotNull(multibinder); |
| |
| assertEquals(elementType, multibinder.getElementTypeLiteral()); |
| List<Object> otherMultibinders = Lists.newArrayList(); |
| Set<Element> otherContains = new HashSet<Element>(); |
| List<Element> otherElements = Lists.newArrayList(); |
| for(Element element : elements) { |
| boolean contains = multibinder.containsElement(element); |
| if(!contains) { |
| otherElements.add(element); |
| } |
| boolean matched = false; |
| if(element instanceof Binding) { |
| Binding binding = (Binding)element; |
| Object visited = binding.acceptTargetVisitor(visitor); |
| if(visited != null) { |
| matched = true; |
| if(visited.equals(multibinder)) { |
| assertTrue(contains); |
| } else { |
| otherMultibinders.add(visited); |
| } |
| } |
| } |
| |
| if(!matched && contains) { |
| otherContains.add(element); |
| } |
| } |
| |
| if(allowDuplicates) { |
| assertEquals("wrong contained elements: " + otherContains, bindResults.size() + 1, otherContains.size()); |
| } else { |
| assertEquals("wrong contained elements: " + otherContains, bindResults.size(), otherContains.size()); |
| } |
| |
| assertEquals("other multibindings found: " + otherMultibinders, otherMultibindings, |
| otherMultibinders.size()); |
| |
| // Validate that we can construct an injector out of the remaining bindings. |
| Guice.createInjector(Elements.getModule(otherElements)); |
| } |
| |
| /** |
| * Asserts that OptionalBinderBinding visitors for work correctly. |
| * |
| * @param <T> The type of the binding |
| * @param keyType The key OptionalBinder is binding |
| * @param modules The modules that define the bindings |
| * @param visitType The kind of test we should perform. A live Injector, a raw Elements (Module) |
| * test, or both. |
| * @param expectedOtherOptionalBindings the # of other optional bindings we expect to see. |
| * @param expectedDefault the expected default binding, or null if none |
| * @param expectedActual the expected actual binding, or null if none |
| */ |
| static <T> void assertOptionalVisitor(Key<T> keyType, |
| Iterable<? extends Module> modules, |
| VisitType visitType, |
| int expectedOtherOptionalBindings, |
| BindResult<?> expectedDefault, |
| BindResult<?> expectedActual) { |
| if (visitType == null) { |
| fail("must test something"); |
| } |
| |
| if (visitType == BOTH || visitType == INJECTOR) { |
| optionalInjectorTest(keyType, modules, expectedOtherOptionalBindings, expectedDefault, |
| expectedActual); |
| } |
| |
| if (visitType == BOTH || visitType == MODULE) { |
| optionalModuleTest(keyType, modules, expectedOtherOptionalBindings, expectedDefault, |
| expectedActual); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static <T> void optionalInjectorTest(Key<T> keyType, Iterable<? extends Module> modules, |
| int expectedOtherOptionalBindings, BindResult<?> expectedDefault, |
| BindResult<?> expectedActual) { |
| Key<Optional<T>> optionalKey = |
| keyType.ofType(OptionalBinder.optionalOf(keyType.getTypeLiteral())); |
| Injector injector = Guice.createInjector(modules); |
| Binding<Optional<T>> optionalBinding = injector.getBinding(optionalKey); |
| Visitor<Optional<T>> visitor = new Visitor<Optional<T>>(); |
| OptionalBinderBinding<T> optionalBinder = |
| (OptionalBinderBinding<T>) optionalBinding.acceptTargetVisitor(visitor); |
| assertNotNull(optionalBinder); |
| assertEquals(optionalKey, optionalBinder.getKey()); |
| |
| if (expectedDefault == null) { |
| assertNull("did not expect a default binding", optionalBinder.getDefaultBinding()); |
| } else { |
| assertTrue("expectedDefault: " + expectedDefault + ", actualDefault: " |
| + optionalBinder.getDefaultBinding(), |
| matches(optionalBinder.getDefaultBinding(), expectedDefault)); |
| } |
| |
| if (expectedActual == null) { |
| assertNull(optionalBinder.getActualBinding()); |
| } else { |
| assertTrue("expectedActual: " + expectedActual + ", actualActual: " |
| + optionalBinder.getActualBinding(), |
| matches(optionalBinder.getActualBinding(), expectedActual)); |
| } |
| |
| |
| Key<Optional<javax.inject.Provider<T>>> optionalJavaxProviderKey = |
| keyType.ofType(optionalOfJavaxProvider(keyType.getTypeLiteral())); |
| Key<Optional<Provider<T>>> optionalProviderKey = |
| keyType.ofType(optionalOfProvider(keyType.getTypeLiteral())); |
| Binding<Map<Source, T>> mapBinding = injector.getBinding( |
| keyType.ofType(mapOf(TypeLiteral.get(Source.class), keyType.getTypeLiteral()))); |
| MapBinderBinding<Map<Source, T>> mapbinderBinding = (MapBinderBinding< |
| Map<Source, T>>) mapBinding.acceptTargetVisitor(new Visitor<Map<Source, T>>()); |
| |
| boolean keyMatch = false; |
| boolean optionalKeyMatch = false; |
| boolean optionalJavaxProviderKeyMatch = false; |
| boolean optionalProviderKeyMatch = false; |
| boolean mapBindingMatch = false; |
| boolean defaultMatch = false; |
| boolean actualMatch = false; |
| List<Object> otherOptionalBindings = Lists.newArrayList(); |
| List<Binding> otherMatches = Lists.newArrayList(); |
| for (Binding b : injector.getAllBindings().values()) { |
| boolean contains = optionalBinder.containsElement(b); |
| Object visited = b.acceptTargetVisitor(visitor); |
| if (visited instanceof OptionalBinderBinding) { |
| if (visited.equals(optionalBinder)) { |
| assertTrue(contains); |
| } else { |
| otherOptionalBindings.add(visited); |
| } |
| } |
| if (b.getKey().equals(keyType)) { |
| // keyType might match because a user bound it |
| // (which is possible in a purely absent OptionalBinder) |
| assertEquals(expectedDefault != null || expectedActual != null, contains); |
| if (contains) { |
| keyMatch = true; |
| } |
| } else if (b.getKey().equals(optionalKey)) { |
| assertTrue(contains); |
| optionalKeyMatch = true; |
| } else if (b.getKey().equals(optionalJavaxProviderKey)) { |
| assertTrue(contains); |
| optionalJavaxProviderKeyMatch = true; |
| } else if (b.getKey().equals(optionalProviderKey)) { |
| assertTrue(contains); |
| optionalProviderKeyMatch = true; |
| } else if (b.getKey().equals(mapBinding.getKey())) { |
| assertTrue(contains); |
| mapBindingMatch = true; |
| // Validate that this binding is also a MapBinding. |
| assertEquals(mapbinderBinding, b.acceptTargetVisitor(visitor)); |
| } else if (expectedDefault != null && matches(b, expectedDefault)) { |
| assertTrue(contains); |
| defaultMatch = true; |
| } else if (expectedActual != null && matches(b, expectedActual)) { |
| assertTrue(contains); |
| actualMatch = true; |
| } else if (mapbinderBinding.containsElement(b)) { |
| assertTrue(contains); |
| } else if (contains) { |
| otherMatches.add(b); |
| } |
| } |
| |
| assertEquals(otherMatches.toString(), 0, otherMatches.size()); |
| // only expect a keymatch if either default or actual are set |
| assertEquals(expectedDefault != null || expectedActual != null, keyMatch); |
| assertTrue(optionalKeyMatch); |
| assertTrue(optionalJavaxProviderKeyMatch); |
| assertTrue(optionalProviderKeyMatch); |
| assertTrue(mapBindingMatch); |
| assertEquals(expectedDefault != null, defaultMatch); |
| assertEquals(expectedActual != null, actualMatch); |
| assertEquals("other OptionalBindings found: " + otherOptionalBindings, |
| expectedOtherOptionalBindings, otherOptionalBindings.size()); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static <T> void optionalModuleTest(Key<T> keyType, Iterable<? extends Module> modules, |
| int expectedOtherOptionalBindings, BindResult<?> expectedDefault, |
| BindResult<?> expectedActual) { |
| Set<Element> elements = ImmutableSet.copyOf(Elements.getElements(modules)); |
| Map<Key<?>, Binding<?>> indexed = index(elements); |
| Key<Optional<T>> optionalKey = |
| keyType.ofType(OptionalBinder.optionalOf(keyType.getTypeLiteral())); |
| Key<Map<Source, T>> sourceMapKey = |
| keyType.ofType(mapOf(TypeLiteral.get(Source.class), keyType.getTypeLiteral())); |
| Visitor<Optional<T>> visitor = new Visitor<Optional<T>>(); |
| OptionalBinderBinding<T> optionalBinder = null; |
| MapBinderBinding<Map<Source, T>> mapbinderBinding = null; |
| Key<?> defaultKey = null; |
| Key<?> actualKey = null; |
| |
| Binding optionalBinding = indexed.get(optionalKey); |
| optionalBinder = (OptionalBinderBinding<T>) optionalBinding.acceptTargetVisitor(visitor); |
| Binding mapBinding = indexed.get(sourceMapKey); |
| mapbinderBinding = (MapBinderBinding<Map<Source, T>>) mapBinding.acceptTargetVisitor(visitor); |
| |
| // Locate the defaultKey & actualKey |
| for (Element element : elements) { |
| if (optionalBinder.containsElement(element) && element instanceof Binding) { |
| Binding binding = (Binding) element; |
| if (isSourceEntry(binding, Source.DEFAULT)) { |
| defaultKey = keyFromOptionalSourceBinding(binding, indexed); |
| } else if (isSourceEntry(binding, Source.ACTUAL)) { |
| actualKey = keyFromOptionalSourceBinding(binding, indexed); |
| } |
| } |
| } |
| assertNotNull(optionalBinder); |
| assertEquals(expectedDefault == null, defaultKey == null); |
| assertEquals(expectedActual == null, actualKey == null); |
| |
| Key<Optional<javax.inject.Provider<T>>> optionalJavaxProviderKey = |
| keyType.ofType(optionalOfJavaxProvider(keyType.getTypeLiteral())); |
| Key<Optional<Provider<T>>> optionalProviderKey = |
| keyType.ofType(optionalOfProvider(keyType.getTypeLiteral())); |
| boolean keyMatch = false; |
| boolean optionalKeyMatch = false; |
| boolean optionalJavaxProviderKeyMatch = false; |
| boolean optionalProviderKeyMatch = false; |
| boolean mapBindingMatch = false; |
| boolean defaultMatch = false; |
| boolean actualMatch = false; |
| List<Object> otherOptionalElements = Lists.newArrayList(); |
| List<Element> otherContains = Lists.newArrayList(); |
| List<Element> nonContainedElements = Lists.newArrayList(); |
| for (Element element : elements) { |
| boolean contains = optionalBinder.containsElement(element); |
| if (!contains) { |
| nonContainedElements.add(element); |
| } |
| Key key = null; |
| Binding b = null; |
| if (element instanceof Binding) { |
| b = (Binding) element; |
| key = b.getKey(); |
| Object visited = b.acceptTargetVisitor(visitor); |
| if (visited instanceof OptionalBinderBinding) { |
| if (visited.equals(optionalBinder)) { |
| assertTrue(contains); |
| } else { |
| otherOptionalElements.add(visited); |
| } |
| } |
| } else if (element instanceof ProviderLookup) { |
| key = ((ProviderLookup) element).getKey(); |
| } |
| |
| if (key != null && key.equals(keyType)) { |
| // keyType might match because a user bound it |
| // (which is possible in a purely absent OptionalBinder) |
| assertEquals(expectedDefault != null || expectedActual != null, contains); |
| if (contains) { |
| keyMatch = true; |
| } |
| } else if (key != null && key.equals(optionalKey)) { |
| assertTrue(contains); |
| optionalKeyMatch = true; |
| } else if (key != null && key.equals(optionalJavaxProviderKey)) { |
| assertTrue(contains); |
| optionalJavaxProviderKeyMatch = true; |
| } else if (key != null && key.equals(optionalProviderKey)) { |
| assertTrue(contains); |
| optionalProviderKeyMatch = true; |
| } else if (key != null && key.equals(sourceMapKey)) { |
| assertTrue(contains); |
| mapBindingMatch = true; |
| // Validate that this binding is also a MapBinding. |
| assertEquals(mapbinderBinding, b.acceptTargetVisitor(visitor)); |
| } else if (key != null && key.equals(defaultKey)) { |
| assertTrue(contains); |
| if (b != null) { // otherwise it might just be a ProviderLookup into it |
| assertTrue("expected: " + expectedDefault + ", but was: " + b, |
| matches(b, expectedDefault)); |
| defaultMatch = true; |
| } |
| } else if (key != null && key.equals(actualKey)) { |
| assertTrue(contains); |
| if (b != null) { // otherwise it might just be a ProviderLookup into it |
| assertTrue("expected: " + expectedActual + ", but was: " + b, matches(b, expectedActual)); |
| actualMatch = true; |
| } |
| } else if (mapbinderBinding.containsElement(element)) { |
| assertTrue(contains); |
| } else if (contains) { |
| otherContains.add(element); |
| } |
| } |
| |
| // only expect a keymatch if either default or actual are set |
| assertEquals(expectedDefault != null || expectedActual != null, keyMatch); |
| assertTrue(optionalKeyMatch); |
| assertTrue(optionalJavaxProviderKeyMatch); |
| assertTrue(optionalProviderKeyMatch); |
| assertTrue(mapBindingMatch); |
| assertEquals(expectedDefault != null, defaultMatch); |
| assertEquals(expectedActual != null, actualMatch); |
| assertEquals(otherContains.toString(), 0, otherContains.size()); |
| assertEquals("other OptionalBindings found: " + otherOptionalElements, |
| expectedOtherOptionalBindings, otherOptionalElements.size()); |
| |
| // Validate that we can construct an injector out of the remaining bindings. |
| Guice.createInjector(Elements.getModule(nonContainedElements)); |
| } |
| |
| private static Key<?> keyFromOptionalSourceBinding(Binding<?> binding, |
| Map<Key<?>, Binding<?>> elements) { |
| // Flow is: |
| // binding == ProviderInstanceBinding<Map.Entry<Source, Provider<String>> |
| // dependency on: Provider<String> that maps to ProviderInstanceBinding<String> in MapBinder |
| // dependency on: Provider<String> of user set value. |
| Key<?> mapKey = |
| genericOf(getOnlyElement(((HasDependencies) binding).getDependencies()).getKey()); |
| Binding<?> mapBinding = elements.get(mapKey); |
| Key<?> userKey = |
| genericOf(getOnlyElement(((HasDependencies) mapBinding).getDependencies()).getKey()); |
| return userKey; |
| } |
| |
| /** Returns {@code Key<T>} for something like {@code Key<Provider<T>>} */ |
| private static Key<?> genericOf(Key<?> key) { |
| ParameterizedType type = (ParameterizedType) key.getTypeLiteral().getType(); |
| assertEquals(1, type.getActualTypeArguments().length); |
| Key<?> result = key.ofType(type.getActualTypeArguments()[0]); |
| return result; |
| } |
| |
| private static boolean isSourceEntry(Binding b, Source type) { |
| if (b instanceof ProviderInstanceBinding && b.getKey().getAnnotation() instanceof RealElement) { |
| javax.inject.Provider provider = ((ProviderInstanceBinding) b).getUserSuppliedProvider(); |
| if (provider instanceof Map.Entry) { |
| Map.Entry entry = (Map.Entry) provider; |
| if (entry.getKey() == type) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** Returns the subset of elements that have keys, indexed by them. */ |
| private static Map<Key<?>, Binding<?>> index(Iterable<Element> elements) { |
| ImmutableMap.Builder<Key<?>, Binding<?>> builder = ImmutableMap.builder(); |
| for (Element element : elements) { |
| if (element instanceof Binding) { |
| builder.put(((Binding) element).getKey(), (Binding) element); |
| } |
| } |
| return builder.build(); |
| } |
| |
| static <K, V> MapResult instance(K k, V v) { |
| return new MapResult<K, V>(k, new BindResult<V>(INSTANCE, v, null)); |
| } |
| |
| static <K, V> MapResult linked(K k, Class<? extends V> clazz) { |
| return new MapResult<K, V>(k, new BindResult<V>(LINKED, null, Key.get(clazz))); |
| } |
| |
| static <K, V> MapResult linked(K k, Key<? extends V> key) { |
| return new MapResult<K, V>(k, new BindResult<V>(LINKED, null, key)); |
| } |
| |
| static <K, V> MapResult providerInstance(K k, V v) { |
| return new MapResult<K, V>(k, new BindResult<V>(PROVIDER_INSTANCE, v, null)); |
| } |
| |
| static class MapResult<K, V> { |
| private final K k; |
| private final BindResult<V> v; |
| |
| MapResult(K k, BindResult<V> v) { |
| this.k = k; |
| this.v = v; |
| } |
| |
| @Override |
| public String toString() { |
| return "entry[key[" + k + "],value[" + v + "]]"; |
| } |
| } |
| |
| private static boolean matches(Binding<?> item, BindResult<?> result) { |
| switch (result.type) { |
| case INSTANCE: |
| if (item instanceof InstanceBinding |
| && ((InstanceBinding) item).getInstance().equals(result.instance)) { |
| return true; |
| } |
| break; |
| case LINKED: |
| if (item instanceof LinkedKeyBinding |
| && ((LinkedKeyBinding) item).getLinkedKey().equals(result.key)) { |
| return true; |
| } |
| break; |
| case PROVIDER_INSTANCE: |
| if (item instanceof ProviderInstanceBinding |
| && Objects.equal(((ProviderInstanceBinding) item).getUserSuppliedProvider().get(), |
| result.instance)) { |
| return true; |
| } |
| break; |
| case PROVIDER_KEY: |
| if (item instanceof ProviderKeyBinding |
| && ((ProviderKeyBinding) item).getProviderKey().equals(result.key)) { |
| return true; |
| } |
| break; |
| } |
| return false; |
| } |
| |
| static <T> BindResult<T> instance(T t) { |
| return new BindResult<T>(INSTANCE, t, null); |
| } |
| |
| static <T> BindResult<T> linked(Class<? extends T> clazz) { |
| return new BindResult<T>(LINKED, null, Key.get(clazz)); |
| } |
| |
| static <T> BindResult<T> linked(Key<? extends T> key) { |
| return new BindResult<T>(LINKED, null, key); |
| } |
| |
| static <T> BindResult<T> providerInstance(T t) { |
| return new BindResult<T>(PROVIDER_INSTANCE, t, null); |
| } |
| |
| static <T> BindResult<T> providerKey(Key<T> key) { |
| return new BindResult<T>(PROVIDER_KEY, null, key); |
| } |
| |
| /** The kind of binding. */ |
| static enum BindType { INSTANCE, LINKED, PROVIDER_INSTANCE, PROVIDER_KEY } |
| /** The result of the binding. */ |
| static class BindResult<T> { |
| private final BindType type; |
| private final Key<?> key; |
| private final T instance; |
| |
| private BindResult(BindType type, T instance, Key<?> key) { |
| this.type = type; |
| this.instance = instance; |
| this.key = key; |
| } |
| |
| @Override |
| public String toString() { |
| switch(type) { |
| case INSTANCE: |
| return "instance[" + instance + "]"; |
| case LINKED: |
| return "linkedKey[" + key + "]"; |
| case PROVIDER_INSTANCE: |
| return "providerInstance[" + instance + "]"; |
| case PROVIDER_KEY: |
| return "providerKey[" + key + "]"; |
| } |
| return null; |
| } |
| } |
| |
| private static class Visitor<T> extends |
| DefaultBindingTargetVisitor<T, Object> implements MultibindingsTargetVisitor<T, Object> { |
| |
| public Object visit(MultibinderBinding<? extends T> multibinding) { |
| return multibinding; |
| } |
| |
| public Object visit(MapBinderBinding<? extends T> mapbinding) { |
| return mapbinding; |
| } |
| |
| public Object visit(OptionalBinderBinding<? extends T> optionalbinding) { |
| return optionalbinding; |
| } |
| } |
| } |
| |