1 files changed, 165 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/facade/FacadeTaskHelper.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/facade/FacadeTaskHelper.java
new file mode 100644
index 00000000..4fb4341b
--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/facade/FacadeTaskHelper.java
@@ -0,0 +1,165 @@
+/*
+ *  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.util.facade;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tools.ant.Project;
+import org.apache.tools.ant.types.Path;
+
+/**
+ * Helper class for facade implementations - encapsulates treatment of
+ * explicit implementation choices, magic properties and
+ * implementation specific command line arguments.
+ *
+ *
+ * @since Ant 1.5
+ */
+public class FacadeTaskHelper {
+
+    /**
+     * Command line arguments.
+     */
+    private List<ImplementationSpecificArgument> args = new ArrayList<ImplementationSpecificArgument>();
+
+    /**
+     * The explicitly chosen implementation.
+     */
+    private String userChoice;
+
+    /**
+     * The magic property to consult.
+     */
+    private String magicValue;
+
+    /**
+     * The default value.
+     */
+    private String defaultValue;
+
+    /**
+     * User specified path used as classpath when loading the implementation.
+     */
+    private Path implementationClasspath;
+
+    /**
+     * @param defaultValue The default value for the implementation.
+     * Must not be null.
+     */
+    public FacadeTaskHelper(String defaultValue) {
+        this(defaultValue, null);
+    }
+
+    /**
+     * @param defaultValue The default value for the implementation.
+     * Must not be null.
+     * @param magicValue the value of a magic property that may hold a user.
+     * choice.  May be null.
+     */
+    public FacadeTaskHelper(String defaultValue, String magicValue) {
+        this.defaultValue = defaultValue;
+        this.magicValue = magicValue;
+    }
+
+    /**
+     * Used to set the value of the magic property.
+     * @param magicValue the value of a magic property that may hold a user.
+     */
+    public void setMagicValue(String magicValue) {
+        this.magicValue = magicValue;
+    }
+
+    /**
+     * Used for explicit user choices.
+     * @param userChoice the explicitly chosen implementation.
+     */
+    public void setImplementation(String userChoice) {
+        this.userChoice = userChoice;
+    }
+
+    /**
+     * Retrieves the implementation.
+     * @return the implementation.
+     */
+    public String getImplementation() {
+        return userChoice != null ? userChoice
+                                  : (magicValue != null ? magicValue
+                                                        : defaultValue);
+    }
+
+    /**
+     * Retrieves the explicit user choice.
+     * @return the explicit user choice.
+     */
+    public String getExplicitChoice() {
+        return userChoice;
+    }
+
+    /**
+     * Command line argument.
+     * @param arg an argument to add.
+     */
+    public void addImplementationArgument(ImplementationSpecificArgument arg) {
+        args.add(arg);
+    }
+
+    /**
+     * Retrieves the command line arguments enabled for the current
+     * facade implementation.
+     * @return an array of command line arguments.
+     */
+    public String[] getArgs() {
+        List<String> tmp = new ArrayList<String>(args.size());
+        for (ImplementationSpecificArgument arg : args) {
+            String[] curr = arg.getParts(getImplementation());
+            if (curr != null) {
+                for (int i = 0; i < curr.length; i++) {
+                    tmp.add(curr[i]);
+                }
+            }
+        }
+        String[] res = new String[tmp.size()];
+        return (String[]) tmp.toArray(res);
+    }
+
+    /**
+     * Tests whether the implementation has been chosen by the user
+     * (either via a magic property or explicitly.
+     * @return true if magic or user choice has be set.
+     * @since Ant 1.5.2
+     */
+    public boolean hasBeenSet() {
+        return userChoice != null || magicValue != null;
+    }
+
+    /**
+     * The classpath to use when loading the implementation.
+     *
+     * @param project the current project
+     * @return a Path instance that may be appended to
+     * @since Ant 1.8.0
+     */
+    public Path getImplementationClasspath(Project project) {
+        if (implementationClasspath == null) {
+            implementationClasspath = new Path(project);
+        }
+        return implementationClasspath;
+    }
+}