1 files changed, 120 insertions, 0 deletions
diff --git a/src/main/java/org/apache/commons/math3/optimization/PointValuePair.java b/src/main/java/org/apache/commons/math3/optimization/PointValuePair.java
new file mode 100644
index 0000000..cb4e0bd
--- /dev/null
+++ b/src/main/java/org/apache/commons/math3/optimization/PointValuePair.java
@@ -0,0 +1,120 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.commons.math3.optimization;
+
+import org.apache.commons.math3.util.Pair;
+
+import java.io.Serializable;
+
+/**
+ * This class holds a point and the value of an objective function at that point.
+ *
+ * @see PointVectorValuePair
+ * @see org.apache.commons.math3.analysis.MultivariateFunction
+ * @deprecated As of 3.1 (to be removed in 4.0).
+ * @since 3.0
+ */
+@Deprecated
+public class PointValuePair extends Pair<double[], Double> implements Serializable {
+
+    /** Serializable UID. */
+    private static final long serialVersionUID = 20120513L;
+
+    /**
+     * Builds a point/objective function value pair.
+     *
+     * @param point Point coordinates. This instance will store a copy of the array, not the array
+     *     passed as argument.
+     * @param value Value of the objective function at the point.
+     */
+    public PointValuePair(final double[] point, final double value) {
+        this(point, value, true);
+    }
+
+    /**
+     * Builds a point/objective function value pair.
+     *
+     * @param point Point coordinates.
+     * @param value Value of the objective function at the point.
+     * @param copyArray if {@code true}, the input array will be copied, otherwise it will be
+     *     referenced.
+     */
+    public PointValuePair(final double[] point, final double value, final boolean copyArray) {
+        super(copyArray ? ((point == null) ? null : point.clone()) : point, value);
+    }
+
+    /**
+     * Gets the point.
+     *
+     * @return a copy of the stored point.
+     */
+    public double[] getPoint() {
+        final double[] p = getKey();
+        return p == null ? null : p.clone();
+    }
+
+    /**
+     * Gets a reference to the point.
+     *
+     * @return a reference to the internal array storing the point.
+     */
+    public double[] getPointRef() {
+        return getKey();
+    }
+
+    /**
+     * Replace the instance with a data transfer object for serialization.
+     *
+     * @return data transfer object that will be serialized
+     */
+    private Object writeReplace() {
+        return new DataTransferObject(getKey(), getValue());
+    }
+
+    /** Internal class used only for serialization. */
+    private static class DataTransferObject implements Serializable {
+        /** Serializable UID. */
+        private static final long serialVersionUID = 20120513L;
+
+        /** Point coordinates. @Serial */
+        private final double[] point;
+
+        /** Value of the objective function at the point. @Serial */
+        private final double value;
+
+        /**
+         * Simple constructor.
+         *
+         * @param point Point coordinates.
+         * @param value Value of the objective function at the point.
+         */
+        DataTransferObject(final double[] point, final double value) {
+            this.point = point.clone();
+            this.value = value;
+        }
+
+        /**
+         * Replace the deserialized data transfer object with a {@link PointValuePair}.
+         *
+         * @return replacement {@link PointValuePair}
+         */
+        private Object readResolve() {
+            return new PointValuePair(point, value, false);
+        }
+    }
+}