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Diffstat (limited to 'common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/predicate/int_/CriterionIntPredicate.java')
-rw-r--r-- | common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/predicate/int_/CriterionIntPredicate.java | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/predicate/int_/CriterionIntPredicate.java b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/predicate/int_/CriterionIntPredicate.java new file mode 100644 index 0000000000..d895490a86 --- /dev/null +++ b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/predicate/int_/CriterionIntPredicate.java @@ -0,0 +1,71 @@ +/******************************************************************************* + * Copyright (c) 2005, 2015 Oracle. All rights reserved. + * This program and the accompanying materials are made available under the + * terms of the Eclipse Public License v1.0, which accompanies this distribution + * and is available at http://www.eclipse.org/legal/epl-v10.html. + * + * Contributors: + * Oracle - initial API and implementation + ******************************************************************************/ +package org.eclipse.jpt.common.utility.internal.predicate.int_; + +import org.eclipse.jpt.common.utility.internal.ObjectTools; +import org.eclipse.jpt.common.utility.predicate.IntPredicate; + +/** + * Simple, abstract implementation of {@link IntPredicate} + * that holds on to a criterion object that can be used in the + * {@link #evaluate(int) evaluate} method. + * <p> + * This class simplifies the implementation of straightforward inner classes. + * + * @param <C> the type of the filter's criterion + */ +public abstract class CriterionIntPredicate<C> + implements IntPredicate +{ + protected final C criterion; + + + /** + * Construct a simple predicate with a <code>null</code> criterion. + */ + protected CriterionIntPredicate() { + this(null); + } + + /** + * More useful constructor. The specified criterion can + * be used by a subclass to evaluate objects. + */ + protected CriterionIntPredicate(C criterion) { + super(); + this.criterion = criterion; + } + + /** + * Return the predicate's criterion. + */ + public C getCriterion() { + return this.criterion; + } + + @Override + public boolean equals(Object o) { + if (o.getClass() != this.getClass()) { + return false; + } + CriterionIntPredicate<?> other = (CriterionIntPredicate<?>) o; + return ObjectTools.equals(this.criterion, other.criterion); + } + + @Override + public int hashCode() { + return (this.criterion == null) ? 0 : this.criterion.hashCode(); + } + + @Override + public String toString() { + return ObjectTools.toString(this, this.criterion); + } +} |