1 files changed, 103 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/selectors/MajoritySelector.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/selectors/MajoritySelector.java
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+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/selectors/MajoritySelector.java
@@ -0,0 +1,103 @@
+/*
+ *  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.tools.ant.types.selectors;
+
+import java.io.File;
+import java.util.Enumeration;
+
+/**
+ * This selector is here just to shake up your thinking a bit. Don't get
+ * too caught up in boolean, there are other ways you can evaluate a
+ * collection of selectors. This one takes a vote of the selectors it
+ * contains, and majority wins. You could also have an "all-but-one"
+ * selector, a "weighted-average" selector, and so on. These are left
+ * as exercises for the reader (as are the usecases where this would
+ * be necessary).
+ *
+ * @since 1.5
+ */
+public class MajoritySelector extends BaseSelectorContainer {
+
+    private boolean allowtie = true;
+
+    /**
+     * Default constructor.
+     */
+    public MajoritySelector() {
+    }
+
+    /**
+     * @return a string describing this object
+     */
+    public String toString() {
+        StringBuilder buf = new StringBuilder();
+        if (hasSelectors()) {
+            buf.append("{majorityselect: ");
+            buf.append(super.toString());
+            buf.append("}");
+        }
+        return buf.toString();
+    }
+
+    /**
+     * A attribute to specify what will happen if number
+     * of yes votes is the same as the number of no votes
+     * defaults to true
+     *
+     * @param tiebreaker the value to give if there is a tie
+     */
+    public void setAllowtie(boolean tiebreaker) {
+        allowtie = tiebreaker;
+    }
+
+    /**
+     * Returns true (the file is selected) if most of the other selectors
+     * agree. In case of a tie, go by the allowtie setting. That defaults
+     * to true, meaning in case of a tie, the file is selected.
+     *
+     * @param basedir the base directory the scan is being done from
+     * @param filename is the name of the file to check
+     * @param file is a java.io.File object for the filename that the selector
+     * can use
+     * @return whether the file should be selected or not
+     */
+    public boolean isSelected(File basedir, String filename, File file) {
+        validate();
+        int yesvotes = 0;
+        int novotes = 0;
+        Enumeration<FileSelector> e = selectorElements();
+
+        while (e.hasMoreElements()) {
+            if (e.nextElement().isSelected(basedir,
+                    filename, file)) {
+                yesvotes++;
+            } else {
+                novotes++;
+            }
+        }
+        if (yesvotes > novotes) {
+            return true;
+        } else if (novotes > yesvotes) {
+            return false;
+        }
+        // At this point, we know we have a tie.
+        return allowtie;
+    }
+}
+