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Diffstat (limited to 'bundles/org.eclipse.osgi.util/src/org/osgi/util/promise/ResolvedPromiseImpl.java')
-rw-r--r-- | bundles/org.eclipse.osgi.util/src/org/osgi/util/promise/ResolvedPromiseImpl.java | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/bundles/org.eclipse.osgi.util/src/org/osgi/util/promise/ResolvedPromiseImpl.java b/bundles/org.eclipse.osgi.util/src/org/osgi/util/promise/ResolvedPromiseImpl.java new file mode 100644 index 000000000..d65146576 --- /dev/null +++ b/bundles/org.eclipse.osgi.util/src/org/osgi/util/promise/ResolvedPromiseImpl.java @@ -0,0 +1,83 @@ +/* + * Copyright (c) OSGi Alliance (2017). All Rights Reserved. + * + * 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 org.osgi.util.promise; + +/** + * Resolved Promise implementation. + * <p> + * This class is not used directly by clients. Clients should use + * {@link PromiseFactory#resolved(Object)} to create a resolved {@link Promise}. + * + * @param <T> The result type associated with the Promise. + * @since 1.1 + * @ThreadSafe + * @author $Id$ + */ +final class ResolvedPromiseImpl<T> extends PromiseImpl<T> { + /** + * The value of this resolved Promise. + */ + private final T value; + + /** + * Initialize this resolved Promise. + * + * @param value The value of this resolved Promise. + * @param factory The factory to use for callbacks and scheduled operations. + */ + ResolvedPromiseImpl(T value, PromiseFactory factory) { + super(factory); + this.value = value; + } + + /** + * {@inheritDoc} + */ + @Override + public boolean isDone() { + return true; + } + + /** + * {@inheritDoc} + */ + @Override + public T getValue() { + return value; + } + + /** + * {@inheritDoc} + */ + @Override + public Throwable getFailure() { + return null; + } + + /** + * Return a holder of the result of this PromiseImpl. + */ + @Override + Result<T> collect() { + return new Result<T>(value); + } + + @Override + public String toString() { + return super.toString() + "[resolved: " + value + "]"; + } +} |