OpenConcerto

Dépôt officiel du code source de l'ERP OpenConcerto
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svn://code.openconcerto.org/openconcerto

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180 ilm 1 
/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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 *
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 * Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved.
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 *
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 * The contents of this file are subject to the terms of the GNU General Public License Version 3
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 * only ("GPL"). You may not use this file except in compliance with the License. You can obtain a
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 * copy of the License at http://www.gnu.org/licenses/gpl-3.0.html See the License for the specific
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 * language governing permissions and limitations under the License.
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 *
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 * When distributing the software, include this License Header Notice in each file.
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 */
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 package org.openconcerto.utils.function;
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import java.util.Objects;
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import net.jcip.annotations.Immutable;
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/**
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 * A supplier returning a constant value.
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 *
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 * @author sylvain
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 * @param <T> the type of results supplied by this supplier.
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 * @see FunctionalSupplier#getConstant(Object)
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 */
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@Immutable
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public final class ConstantSupplier<T> extends FunctionalSupplier<T> {
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    private final T value;
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    ConstantSupplier(final T value) {
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        super();
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        this.value = value;
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    }
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    @Override
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    public T get() {
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        return this.value;
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    }
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    @Override
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    public int hashCode() {
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        return this.value == null ? 0 : this.value.hashCode();
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    }
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    @Override
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    public boolean equals(Object obj) {
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        if (this == obj)
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            return true;
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        if (obj == null)
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            return false;
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        if (getClass() != obj.getClass())
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            return false;
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        final ConstantSupplier<?> other = (ConstantSupplier<?>) obj;
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        return Objects.equals(this.value, other.value);
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    }
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    @Override
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    public String toString() {
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        return this.getClass().getSimpleName() + " of " + this.get();
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    }
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}