1 files changed, 95 insertions, 0 deletions
diff --git a/src/main/java/org/apache/commons/math3/optim/univariate/SearchInterval.java b/src/main/java/org/apache/commons/math3/optim/univariate/SearchInterval.java
new file mode 100644
index 0000000..fa80e64
--- /dev/null
+++ b/src/main/java/org/apache/commons/math3/optim/univariate/SearchInterval.java
@@ -0,0 +1,95 @@
+/*
+ * 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.optim.univariate;
+
+import org.apache.commons.math3.optim.OptimizationData;
+import org.apache.commons.math3.exception.NumberIsTooLargeException;
+import org.apache.commons.math3.exception.OutOfRangeException;
+
+/**
+ * Search interval and (optional) start value.
+ * <br/>
+ * Immutable class.
+ *
+ * @since 3.1
+ */
+public class SearchInterval implements OptimizationData {
+    /** Lower bound. */
+    private final double lower;
+    /** Upper bound. */
+    private final double upper;
+    /** Start value. */
+    private final double start;
+
+    /**
+     * @param lo Lower bound.
+     * @param hi Upper bound.
+     * @param init Start value.
+     * @throws NumberIsTooLargeException if {@code lo >= hi}.
+     * @throws OutOfRangeException if {@code init < lo} or {@code init > hi}.
+     */
+    public SearchInterval(double lo,
+                          double hi,
+                          double init) {
+        if (lo >= hi) {
+            throw new NumberIsTooLargeException(lo, hi, false);
+        }
+        if (init < lo ||
+            init > hi) {
+            throw new OutOfRangeException(init, lo, hi);
+        }
+
+        lower = lo;
+        upper = hi;
+        start = init;
+    }
+
+    /**
+     * @param lo Lower bound.
+     * @param hi Upper bound.
+     * @throws NumberIsTooLargeException if {@code lo >= hi}.
+     */
+    public SearchInterval(double lo,
+                          double hi) {
+        this(lo, hi, 0.5 * (lo + hi));
+    }
+
+    /**
+     * Gets the lower bound.
+     *
+     * @return the lower bound.
+     */
+    public double getMin() {
+        return lower;
+    }
+    /**
+     * Gets the upper bound.
+     *
+     * @return the upper bound.
+     */
+    public double getMax() {
+        return upper;
+    }
+    /**
+     * Gets the start value.
+     *
+     * @return the start value.
+     */
+    public double getStartValue() {
+        return start;
+    }
+}