/* * The MIT License (MIT) * * Copyright (c) 2016. Diorite (by Bartłomiej Mazur (aka GotoFinal)) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package org.diorite.commons.reflections; import javax.annotation.Nonnull; import javax.annotation.Nullable; import java.lang.invoke.MethodHandle; import java.lang.invoke.MethodHandles; import java.lang.reflect.Constructor; import java.lang.reflect.InvocationTargetException; import org.diorite.commons.DioriteUtils; /** * Class used to invoke previously prepared constructors, * constructors used by this class must be accessible. */ public class ConstructorInvoker<T> implements ReflectMethod { private final Constructor<T> constructor; /** * Construct new invoker for given constructor, it don't check its accessible status. * * @param constructor * constructor to wrap. */ @SuppressWarnings("unchecked") public ConstructorInvoker(Constructor<?> constructor) { this.constructor = (Constructor<T>) constructor; } /** * Invoke constructor and create new object. * * @param arguments * arguments for constructor. * * @return new object. */ @Override @Nonnull public T invokeWith(Object... arguments) { try { return this.constructor.newInstance(arguments); } catch (InstantiationException | IllegalAccessException | IllegalArgumentException e) { throw new RuntimeException("Cannot invoke constructor " + this.constructor, e); } catch (InvocationTargetException e) { throw DioriteUtils.sneakyThrow(e.getCause()); } catch (Exception e) { throw DioriteUtils.sneakyThrow(e); } } @Override public String getName() { return this.constructor.getName(); } /** * @return wrapped constructor. */ public Constructor<T> getConstructor() { return this.constructor; } @Nullable private MethodHandle cached; @Override public boolean isConstructor() { return true; } @Override public boolean isStatic() { return false; } @Override public int getModifiers() { return this.constructor.getModifiers(); } @Override public void ensureAccessible() { DioriteReflectionUtils.getAccess(this.constructor); } @Override public MethodHandle getHandle() { if (this.cached != null) { return this.cached; } try { return this.cached = MethodHandles.lookup().unreflectConstructor(this.constructor); } catch (IllegalAccessException e) { throw new RuntimeException("Cannot access reflection.", e); } } @Override public String toString() { return this.constructor.toString(); } }