--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/source/SourceSection.java	Fri Jun 06 22:13:00 2014 -0700
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.api.source;
+
+/**
+ * Description of contiguous section of text within a {@link Source} of program code; supports
+ * multiple modes of access to the text and its location. A special {@linkplain NullSourceSection
+ * null subtype} should be used for code that is not available from source, e.g language builtins.
+ *
+ * @see Source#createSection(String, int, int, int, int)
+ * @see Source#createSection(String, int, int, int)
+ * @see Source#createSection(String, int, int)
+ * @see Source#createSection(String, int)
+ * @see NullSourceSection
+ */
+public interface SourceSection {
+
+    // TODO support alternate text representations/encodings
+
+    /**
+     * Representation of the source program that contains this section.
+     *
+     * @return the source object
+     */
+    Source getSource();
+
+    /**
+     * Returns 1-based line number of the first character in this section (inclusive).
+     *
+     * @return the starting line number
+     */
+    int getStartLine();
+
+    /**
+     * Gets a representation of the first line of the section, suitable for a hash key.
+     */
+    LineLocation getLineLocation();
+
+    /**
+     * Returns the 1-based column number of the first character in this section (inclusive).
+     *
+     * @return the starting column number
+     */
+    int getStartColumn();
+
+    /**
+     * Returns the 0-based index of the first character in this section.
+     *
+     * @return the starting character index
+     */
+    int getCharIndex();
+
+    /**
+     * Returns the length of this section in characters.
+     *
+     * @return the number of characters in the section
+     */
+    int getCharLength();
+
+    /**
+     * Returns the index of the text position immediately following the last character in the
+     * section.
+     *
+     * @return the end position of the section
+     */
+    int getCharEndIndex();
+
+    /**
+     * Returns terse text describing this source section, typically used for printing the section.
+     *
+     * @return the identifier of the section
+     */
+    String getIdentifier();
+
+    /**
+     * Returns text described by this section.
+     *
+     * @return the code as a String object
+     */
+    String getCode();
+
+    /**
+     * Returns a short description of the source section, using just the file name, rather than its
+     * full path.
+     *
+     * @return a short description of the source section
+     */
+    String getShortDescription();
+
+}