--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/JavaType.java	Thu Oct 08 17:28:41 2015 -0700
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2009, 2015, 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.
+ *
+ * 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 jdk.vm.ci.meta;
+
+import static jdk.vm.ci.meta.MetaUtil.internalNameToJava;
+
+/**
+ * Represents a resolved or unresolved type. Types include primitives, objects, {@code void}, and
+ * arrays thereof.
+ */
+public interface JavaType extends TrustedInterface {
+
+    /**
+     * Returns the name of this type in internal form. The following are examples of strings
+     * returned by this method:
+     *
+     * <pre>
+     *     "Ljava/lang/Object;"
+     *     "I"
+     *     "[[B"
+     * </pre>
+     */
+    String getName();
+
+    /**
+     * Returns an unqualified name of this type.
+     *
+     * <pre>
+     *     "Object"
+     *     "Integer"
+     * </pre>
+     */
+    default String getUnqualifiedName() {
+        String name = getName();
+        if (name.indexOf('/') != -1) {
+            name = name.substring(name.lastIndexOf('/') + 1);
+        }
+        if (name.endsWith(";")) {
+            name = name.substring(0, name.length() - 1);
+        }
+        return name;
+    }
+
+    /**
+     * For array types, gets the type of the components, or {@code null} if this is not an array
+     * type. This method is analogous to {@link Class#getComponentType()}.
+     */
+    JavaType getComponentType();
+
+    /**
+     * Gets the elemental type for this given type. The elemental type is the corresponding zero
+     * dimensional type of an array type. For example, the elemental type of {@code int[][][]} is
+     * {@code int}. A non-array type is its own elemental type.
+     */
+    default JavaType getElementalType() {
+        JavaType t = this;
+        while (t.getComponentType() != null) {
+            t = t.getComponentType();
+        }
+        return t;
+    }
+
+    /**
+     * Gets the array class type representing an array with elements of this type.
+     */
+    JavaType getArrayClass();
+
+    /**
+     * Gets the {@link JavaKind} of this type.
+     */
+    JavaKind getJavaKind();
+
+    /**
+     * Resolves this type to a {@link ResolvedJavaType}.
+     *
+     * @param accessingClass the context of resolution (must not be null)
+     * @return the resolved Java type
+     * @throws LinkageError if the resolution failed
+     * @throws NullPointerException if {@code accessingClass} is {@code null}
+     */
+    ResolvedJavaType resolve(ResolvedJavaType accessingClass);
+
+    /**
+     * Gets the Java programming language name for this type. The following are examples of strings
+     * returned by this method:
+     *
+     * <pre>
+     *      java.lang.Object
+     *      int
+     *      boolean[][]
+     * </pre>
+     *
+     * @return the Java name corresponding to this type
+     */
+    default String toJavaName() {
+        return internalNameToJava(getName(), true, false);
+    }
+
+    /**
+     * Gets the Java programming language name for this type. The following are examples of strings
+     * returned by this method:
+     *
+     * <pre>
+     *     qualified == true:
+     *         java.lang.Object
+     *         int
+     *         boolean[][]
+     *     qualified == false:
+     *         Object
+     *         int
+     *         boolean[][]
+     * </pre>
+     *
+     * @param qualified specifies if the package prefix of this type should be included in the
+     *            returned name
+     * @return the Java name corresponding to this type
+     */
+    default String toJavaName(boolean qualified) {
+        JavaKind kind = getJavaKind();
+        if (kind == JavaKind.Object) {
+            return internalNameToJava(getName(), qualified, false);
+        }
+        return getJavaKind().getJavaName();
+    }
+
+    /**
+     * Returns this type's name in the same format as {@link Class#getName()}.
+     */
+    default String toClassName() {
+        return internalNameToJava(getName(), true, true);
+    }
+}