| /* |
| * Copyright 2000-2014 JetBrains s.r.o. |
| * |
| * 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.intellij.util.pico; |
| |
| import com.intellij.util.containers.ContainerUtil; |
| import org.picocontainer.*; |
| import org.picocontainer.defaults.*; |
| |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.Modifier; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.util.*; |
| |
| /** |
| * A drop-in replacement of {@link org.picocontainer.defaults.ConstructorInjectionComponentAdapter} |
| * The same code (generified and cleaned up) but without constructor caching (hence taking up less memory) |
| */ |
| @SuppressWarnings("ClassNameSameAsAncestorName") |
| public class ConstructorInjectionComponentAdapter extends org.picocontainer.defaults.ConstructorInjectionComponentAdapter { |
| |
| public ConstructorInjectionComponentAdapter(final Object componentKey, final Class componentImplementation, Parameter[] parameters, boolean allowNonPublicClasses, ComponentMonitor monitor, LifecycleStrategy lifecycleStrategy) throws AssignabilityRegistrationException, NotConcreteRegistrationException { |
| super(componentKey, componentImplementation, parameters, allowNonPublicClasses, monitor, lifecycleStrategy); |
| } |
| |
| public ConstructorInjectionComponentAdapter(final Object componentKey, final Class componentImplementation, Parameter[] parameters, boolean allowNonPublicClasses) throws AssignabilityRegistrationException, NotConcreteRegistrationException { |
| super(componentKey, componentImplementation, parameters, allowNonPublicClasses); |
| } |
| |
| public ConstructorInjectionComponentAdapter(Object componentKey, Class componentImplementation, Parameter[] parameters) { |
| this(componentKey, componentImplementation, parameters, false); |
| } |
| |
| public ConstructorInjectionComponentAdapter(Object componentKey, Class componentImplementation) throws AssignabilityRegistrationException, NotConcreteRegistrationException { |
| this(componentKey, componentImplementation, null); |
| } |
| |
| protected Constructor getGreediestSatisfiableConstructor(PicoContainer container) throws |
| PicoIntrospectionException, |
| AssignabilityRegistrationException, NotConcreteRegistrationException { |
| final Set<Constructor> conflicts = new HashSet<Constructor>(); |
| final Set<List<Class>> unsatisfiableDependencyTypes = new HashSet<List<Class>>(); |
| List<Constructor> sortedMatchingConstructors = getSortedMatchingConstructors(); |
| Constructor greediestConstructor = null; |
| int lastSatisfiableConstructorSize = -1; |
| Class unsatisfiedDependencyType = null; |
| for (Constructor constructor : sortedMatchingConstructors) { |
| boolean failedDependency = false; |
| Class[] parameterTypes = constructor.getParameterTypes(); |
| Parameter[] currentParameters = parameters != null ? parameters : createDefaultParameters(parameterTypes); |
| |
| // remember: all constructors with less arguments than the given parameters are filtered out already |
| for (int j = 0; j < currentParameters.length; j++) { |
| // check whether this constructor is satisfiable |
| if (currentParameters[j].isResolvable(container, this, parameterTypes[j])) { |
| continue; |
| } |
| unsatisfiableDependencyTypes.add(Arrays.asList(parameterTypes)); |
| unsatisfiedDependencyType = parameterTypes[j]; |
| failedDependency = true; |
| break; |
| } |
| |
| if (greediestConstructor != null && parameterTypes.length != lastSatisfiableConstructorSize) { |
| if (conflicts.isEmpty()) { |
| // we found our match [aka. greedy and satisfied] |
| return greediestConstructor; |
| } |
| else { |
| // fits although not greedy |
| conflicts.add(constructor); |
| } |
| } |
| else if (!failedDependency && lastSatisfiableConstructorSize == parameterTypes.length) { |
| // satisfied and same size as previous one? |
| conflicts.add(constructor); |
| conflicts.add(greediestConstructor); |
| } |
| else if (!failedDependency) { |
| greediestConstructor = constructor; |
| lastSatisfiableConstructorSize = parameterTypes.length; |
| } |
| } |
| if (!conflicts.isEmpty()) { |
| throw new TooManySatisfiableConstructorsException(getComponentImplementation(), conflicts); |
| } else if (greediestConstructor == null && !unsatisfiableDependencyTypes.isEmpty()) { |
| throw new UnsatisfiableDependenciesException(this, unsatisfiedDependencyType, unsatisfiableDependencyTypes, container); |
| } else if (greediestConstructor == null) { |
| // be nice to the user, show all constructors that were filtered out |
| final Set<Constructor> nonMatching = ContainerUtil.newHashSet(getConstructors()); |
| throw new PicoInitializationException("Either do the specified parameters not match any of the following constructors: " + nonMatching.toString() + " or the constructors were not accessible for '" + getComponentImplementation() + "'"); |
| } |
| return greediestConstructor; |
| } |
| |
| private List<Constructor> getSortedMatchingConstructors() { |
| List<Constructor> matchingConstructors = new ArrayList<Constructor>(); |
| // filter out all constructors that will definitely not match |
| for (Constructor constructor : getConstructors()) { |
| if ((parameters == null || constructor.getParameterTypes().length == parameters.length) && |
| (allowNonPublicClasses || (constructor.getModifiers() & Modifier.PUBLIC) != 0)) { |
| matchingConstructors.add(constructor); |
| } |
| } |
| // optimize list of constructors moving the longest at the beginning |
| if (parameters == null) { |
| Collections.sort(matchingConstructors, new Comparator<Constructor>() { |
| public int compare(Constructor arg0, Constructor arg1) { |
| return arg1.getParameterTypes().length - arg0.getParameterTypes().length; |
| } |
| }); |
| } |
| return matchingConstructors; |
| } |
| |
| private Constructor[] getConstructors() { |
| return (Constructor[]) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return getComponentImplementation().getDeclaredConstructors(); |
| } |
| }); |
| } |
| } |