1 files changed, 133 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/ScriptRunnerCreator.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/ScriptRunnerCreator.java
new file mode 100644
index 00000000..77e9ee73
--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/ScriptRunnerCreator.java
@@ -0,0 +1,133 @@
+/*
+ *  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;
+
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.Project;
+
+/**
+ * This is a helper class used by ScriptRunnerHelper to
+ * create a ScriptRunner based on a classloader and on a language.
+ */
+public class ScriptRunnerCreator {
+    private static final String AUTO = "auto";
+    private static final String OATAU = "org.apache.tools.ant.util";
+    private static final String UTIL_OPT = OATAU + ".optional";
+
+    private static final String BSF = "bsf";
+    private static final String BSF_PACK = "org.apache.bsf";
+    private static final String BSF_MANAGER = BSF_PACK + ".BSFManager";
+    private static final String BSF_RUNNER = UTIL_OPT + ".ScriptRunner";
+
+    private static final String JAVAX = "javax";
+    private static final String JAVAX_MANAGER = "javax.script.ScriptEngineManager";
+    private static final String JAVAX_RUNNER = UTIL_OPT + ".JavaxScriptRunner";
+
+    private Project     project;
+    private String      manager;
+    private String      language;
+    private ClassLoader scriptLoader = null;
+
+    /**
+     * Constructor for creator.
+     * @param project the current project.
+     */
+    public ScriptRunnerCreator(Project project) {
+        this.project = project;
+    }
+
+    /**
+     * Create a ScriptRunner.
+     * @param manager      the script manager ("auto" | "bsf" | "javax")
+     * @param language     the language.
+     * @param classLoader  the classloader to use
+     * @return the created script runner.
+     * @throws BuildException if unable to create the ScriptRunner.
+     */
+    public synchronized ScriptRunnerBase createRunner(
+        String manager, String language, ClassLoader classLoader) {
+        this.manager      = manager;
+        this.language     = language;
+        this.scriptLoader = classLoader;
+
+        if (language == null) {
+            throw new BuildException("script language must be specified");
+        }
+        if (!manager.equals(AUTO) && !manager.equals(JAVAX) && !manager.equals(BSF)) {
+            throw new BuildException("Unsupported language prefix " + manager);
+        }
+
+        // Check for bsf first then javax
+        // This version does not check if the scriptManager
+        // supports the language.
+
+        ScriptRunnerBase ret = null;
+        ret = createRunner(BSF, BSF_MANAGER, BSF_RUNNER);
+        if (ret == null) {
+            ret = createRunner(JAVAX, JAVAX_MANAGER, JAVAX_RUNNER);
+        }
+        if (ret != null) {
+            return ret;
+        }
+        if (JAVAX.equals(manager)) {
+            throw new BuildException(
+                    "Unable to load the script engine manager " + "(" + JAVAX_MANAGER + ")");
+        }
+        if (BSF.equals(manager)) {
+            throw new BuildException(
+                    "Unable to load the BSF script engine manager " + "(" + BSF_MANAGER + ")");
+        }
+        throw new BuildException("Unable to load a script engine manager "
+                + "(" + BSF_MANAGER + " or " + JAVAX_MANAGER + ")");
+    }
+
+    /**
+     * Create a script runner if the scriptManager matches the passed
+     * in manager.
+     * This checks if the script manager exists in the scriptLoader
+     * classloader and if so it creates and returns the script runner.
+     * @param checkManager check if the manager matchs this value.
+     * @param managerClass the name of the script manager class.
+     * @param runnerClass   the name of ant's script runner for this manager.
+     * @return the script runner class.
+     * @throws BuildException if there is a problem creating the runner class.
+     */
+    private ScriptRunnerBase createRunner(
+        String checkManager, String managerClass, String runnerClass) {
+        ScriptRunnerBase runner = null;
+        if (!manager.equals(AUTO) && !manager.equals(checkManager)) {
+            return null;
+        }
+        if (scriptLoader.getResource(LoaderUtils.classNameToResource(managerClass)) == null) {
+            return null;
+        }
+        if (managerClass.equals(BSF_MANAGER)) {
+            new ScriptFixBSFPath().fixClassLoader(scriptLoader, language);
+        }
+        try {
+            runner = (ScriptRunnerBase) Class.forName(
+                    runnerClass, true, scriptLoader).newInstance();
+            runner.setProject(project);
+        } catch (Exception ex) {
+            throw ReflectUtil.toBuildException(ex);
+        }
+        runner.setLanguage(language);
+        runner.setScriptClassLoader(scriptLoader);
+        return runner;
+    }
+}