98 lines
3.3 KiB
Java
98 lines
3.3 KiB
Java
//
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// MIT License
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//
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// Copyright (c) 2020 Alexander Söderberg & Contributors
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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package cloud.commandframework.services;
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import com.google.common.base.Objects;
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import cloud.commandframework.services.annotations.Order;
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import cloud.commandframework.services.types.Service;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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import java.lang.invoke.MethodHandle;
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import java.lang.invoke.MethodHandles;
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import java.lang.reflect.Method;
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class AnnotatedMethodService<Context, Result> implements Service<Context, Result> {
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private final ExecutionOrder executionOrder;
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private final MethodHandle methodHandle;
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private final Method method;
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private final Object instance;
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AnnotatedMethodService(@Nonnull final Object instance, @Nonnull final Method method)
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throws Exception {
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ExecutionOrder executionOrder = ExecutionOrder.SOON;
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try {
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final Order order = method.getAnnotation(Order.class);
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if (order != null) {
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executionOrder = order.value();
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}
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} catch (final Exception ignored) {
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}
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this.instance = instance;
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this.executionOrder = executionOrder;
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method.setAccessible(true);
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this.methodHandle = MethodHandles.lookup().unreflect(method);
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this.method = method;
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}
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@Nullable
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@Override
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@SuppressWarnings("unchecked")
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public Result handle(@Nonnull final Context context) {
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try {
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return (Result) this.methodHandle.invoke(this.instance, context);
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} catch (final Throwable throwable) {
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new IllegalStateException(String
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.format("Failed to call method service implementation '%s' in class '%s'",
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method.getName(), instance.getClass().getCanonicalName()), throwable)
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.printStackTrace();
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}
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return null;
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}
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@Nonnull
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@Override
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public ExecutionOrder order() {
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return this.executionOrder;
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}
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@Override
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public boolean equals(final Object o) {
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if (this == o) {
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return true;
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}
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if (o == null || getClass() != o.getClass()) {
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return false;
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}
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final AnnotatedMethodService<?, ?> that = (AnnotatedMethodService<?, ?>) o;
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return Objects.equal(this.methodHandle, that.methodHandle);
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}
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@Override
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public int hashCode() {
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return Objects.hashCode(this.methodHandle);
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}
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}
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