1 files changed, 70 insertions, 0 deletions
diff --git a/anttasks/src/com/android/ant/BaseTask.java b/anttasks/src/com/android/ant/BaseTask.java
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+++ b/anttasks/src/com/android/ant/BaseTask.java
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+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed 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 com.android.ant;
+
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.Task;
+
+import java.io.File;
+import java.util.ArrayList;
+
+/**
+ * A base class for the ant task that contains logic for handling dependency files
+ */
+public class BaseTask extends Task {
+
+    private DependencyGraph mDependencies;
+
+    /*
+     * (non-Javadoc)
+     *
+     * Executes the loop. Based on the values inside default.properties, this will
+     * create alternate temporary ap_ files.
+     *
+     * @see org.apache.tools.ant.Task#execute()
+     */
+    @Override
+    public void execute() throws BuildException {
+
+    }
+
+    /**
+     * Set up the dependency graph by passing it the location of the ".d" file
+     * @param dependencyFile path to the dependency file to use
+     * @param watchPaths a list of folders to watch for new files
+     * @return true if the dependency graph was sucessfully initialized
+     */
+    protected boolean initDependencies(String dependencyFile, ArrayList<File> watchPaths) {
+        File depFile = new File(dependencyFile);
+        if (depFile.exists()) {
+            mDependencies = new DependencyGraph(dependencyFile, watchPaths);
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Wrapper check to see if we need to execute this task at all
+     * @return true if the DependencyGraph reports that our prereqs or targets
+     *         have changed since the last run
+     */
+    protected boolean dependenciesHaveChanged() {
+        assert mDependencies != null : "Dependencies have not been initialized";
+        return mDependencies.dependenciesHaveChanged();
+    }
+}