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+/*
+ * 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.math.distribution;
+
+/**
+ * Weibull Distribution.  This interface defines the two parameter form of the
+ * distribution as defined by
+ * <a href="http://mathworld.wolfram.com/WeibullDistribution.html">
+ * Weibull Distribution</a>, equations (1) and (2).
+ *
+ * <p>
+ * References:
+ * <ul>
+ * <li><a href="http://mathworld.wolfram.com/WeibullDistribution.html">
+ * Weibull Distribution</a></li>
+ * </ul>
+ * </p>
+ *
+ * @since 1.1
+ * @version $Revision: 920852 $ $Date: 2010-03-09 13:53:44 +0100 (mar. 09 mars 2010) $
+ */
+public interface WeibullDistribution extends ContinuousDistribution {
+
+    /**
+     * Access the shape parameter.
+     * @return the shape parameter.
+     */
+    double getShape();
+
+    /**
+     * Access the scale parameter.
+     * @return the scale parameter.
+     */
+    double getScale();
+
+    /**
+     * Modify the shape parameter.
+     * @param alpha The new shape parameter value.
+     * @deprecated as of v2.1
+     */
+    @Deprecated
+    void setShape(double alpha);
+
+    /**
+     * Modify the scale parameter.
+     * @param beta The new scale parameter value.
+     * @deprecated as of v2.1
+     */
+    @Deprecated
+    void setScale(double beta);
+}