Add abstractcsvexporter and gitignore to ooo-utils

.gitignore

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+target/

src/main/java/com/threerings/util/AbstractCsvExporter.java

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+//
+// $Id: AbstractCsvExporter.java 36591 2014-03-18 17:54:12Z ray $
+
+package com.threerings.util;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.PrintStream;
+
+import java.util.List;
+
+import com.google.common.base.CharMatcher;
+import com.google.common.base.Function;
+import com.google.common.base.Joiner;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Ordering;
+
+import static com.threerings.util.Log.log;
+
+/**
+ * Abstract class for exporting information to csv.
+ */
+public abstract class AbstractCsvExporter
+{
+    /**
+     * The details of an individual row.
+     */
+    public interface Details<T extends Details<?>>
+        extends Comparable<T>
+    {
+        public List<Object> toRow ();
+    }
+
+    /**
+     * Export the rows to a file.
+     */
+    protected static void export (
+        File file, List<? extends Object> headers, Iterable<? extends Details<?>> rows)
+    {
+        try {
+            PrintStream ps = new PrintStream(new FileOutputStream(file), true, "UTF-8");
+            ps.println(toCsv(headers));
+            for (Details<?> row : Ordering.natural().immutableSortedCopy(rows)) {
+                ps.println(toCsv(row.toRow()));
+            }
+            ps.close();
+        } catch (IOException ioe) {
+            log.warning("Error creating file.", "file", file, ioe);
+        }
+    }
+
+    /**
+     * Convert the row to csv.
+     */
+    protected static String toCsv (List<? extends Object> row)
+    {
+        return Joiner.on(',').join(
+            Iterables.transform(
+                row,
+                new Function<Object, Object>() {
+                    public Object apply (Object o) {
+                        if ((o == null) || (o instanceof Number) || (o instanceof Boolean)) {
+                            return o;
+                        }
+                        // quotes need to be escaped by doubling them
+                        return "\"" + CharMatcher.is('"').replaceFrom(String.valueOf(o), "\"\"") +
+                            "\"";
+                    }
+                }));
+    }
+}