--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/ResolvedJavaType.java	Wed May 27 00:36:16 2015 +0200
@@ -0,0 +1,354 @@
+/*
+ * Copyright (c) 2009, 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.
+ *
+ * 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.jvmci.meta;
+
+import java.lang.annotation.*;
+import java.net.*;
+
+import com.oracle.jvmci.meta.Assumptions.AssumptionResult;
+
+/**
+ * Represents a resolved Java type. Types include primitives, objects, {@code void}, and arrays
+ * thereof. Types, like fields and methods, are resolved through {@link ConstantPool constant pools}
+ * .
+ */
+public interface ResolvedJavaType extends JavaType, ModifiersProvider {
+
+    /**
+     * Gets the runtime representation of the Java class object of this type.
+     */
+    JavaConstant getJavaClass();
+
+    /**
+     * Gets the runtime representation of the "hub" of this type--that is, the closest part of the
+     * type representation which is typically stored in the object header.
+     */
+    Constant getObjectHub();
+
+    /**
+     * Checks whether this type has a finalizer method.
+     *
+     * @return {@code true} if this class has a finalizer
+     */
+    boolean hasFinalizer();
+
+    /**
+     * Checks whether this type has any finalizable subclasses so far. Any decisions based on this
+     * information require the registration of a dependency, since this information may change.
+     *
+     * @return {@code true} if this class has any subclasses with finalizers
+     */
+    AssumptionResult<Boolean> hasFinalizableSubclass();
+
+    /**
+     * Checks whether this type is an interface.
+     *
+     * @return {@code true} if this type is an interface
+     */
+    boolean isInterface();
+
+    /**
+     * Checks whether this type is an instance class.
+     *
+     * @return {@code true} if this type is an instance class
+     */
+    boolean isInstanceClass();
+
+    /**
+     * Checks whether this type is an array class.
+     *
+     * @return {@code true} if this type is an array class
+     */
+    boolean isArray();
+
+    /**
+     * Checks whether this type is primitive.
+     *
+     * @return {@code true} if this type is primitive
+     */
+    boolean isPrimitive();
+
+    /**
+     * {@inheritDoc}
+     * <p>
+     * Only the flags specified in the JVM specification will be included in the returned mask. This
+     * method is identical to {@link Class#getModifiers()} in terms of the value return for this
+     * type.
+     */
+    int getModifiers();
+
+    /**
+     * Checks whether this type is initialized. If a type is initialized it implies that it was
+     * {@link #isLinked() linked} and that the static initializer has run.
+     *
+     * @return {@code true} if this type is initialized
+     */
+    boolean isInitialized();
+
+    /**
+     * Initializes this type.
+     */
+    void initialize();
+
+    /**
+     * Checks whether this type is linked and verified. When a type is linked the static initializer
+     * has not necessarily run. An {@link #isInitialized() initialized} type is always linked.
+     *
+     * @return {@code true} if this type is linked
+     */
+    boolean isLinked();
+
+    /**
+     * Determines if this type is either the same as, or is a superclass or superinterface of, the
+     * type represented by the specified parameter. This method is identical to
+     * {@link Class#isAssignableFrom(Class)} in terms of the value return for this type.
+     */
+    boolean isAssignableFrom(ResolvedJavaType other);
+
+    /**
+     * Returns true if this type is exactly the type {@link java.lang.Object}.
+     */
+    default boolean isJavaLangObject() {
+        // Removed assertion due to https://bugs.eclipse.org/bugs/show_bug.cgi?id=434442
+        return getSuperclass() == null && !isInterface() && getKind() == Kind.Object;
+    }
+
+    /**
+     * Checks whether the specified object is an instance of this type.
+     *
+     * @param obj the object to test
+     * @return {@code true} if the object is an instance of this type
+     */
+    boolean isInstance(JavaConstant obj);
+
+    /**
+     * Returns this type if it is an exact type otherwise returns null. This type is exact if it is
+     * void, primitive, final, or an array of a final or primitive type.
+     *
+     * @return this type if it is exact; {@code null} otherwise
+     */
+    ResolvedJavaType asExactType();
+
+    /**
+     * Gets the super class of this type. If this type represents either the {@code Object} class,
+     * an interface, a primitive type, or void, then null is returned. If this object represents an
+     * array class then the type object representing the {@code Object} class is returned.
+     */
+    ResolvedJavaType getSuperclass();
+
+    /**
+     * Gets the interfaces implemented or extended by this type. This method is analogous to
+     * {@link Class#getInterfaces()} and as such, only returns the interfaces directly implemented
+     * or extended by this type.
+     */
+    ResolvedJavaType[] getInterfaces();
+
+    /**
+     * Gets the single implementor of this type. Calling this method on a non-interface type causes
+     * an exception.
+     * <p>
+     * If the compiler uses the result of this method for its compilation, the usage must be guarded
+     * because the verifier can not guarantee that the assigned type really implements this
+     * interface. Additionally, class loading can invalidate the result of this method.
+     *
+     * @return {@code null} if there is no implementor, the implementor if there is only one, or
+     *         {@code this} if there are more than one.
+     */
+    ResolvedJavaType getSingleImplementor();
+
+    /**
+     * Walks the class hierarchy upwards and returns the least common class that is a superclass of
+     * both the current and the given type.
+     *
+     * @return the least common type that is a super type of both the current and the given type, or
+     *         {@code null} if primitive types are involved.
+     */
+    ResolvedJavaType findLeastCommonAncestor(ResolvedJavaType otherType);
+
+    /**
+     * Attempts to get a leaf concrete subclass of this type.
+     * <p>
+     * For an {@linkplain #isArray() array} type A, the leaf concrete subclass is A if the
+     * {@linkplain #getElementalType() elemental} type of A is final (which includes primitive
+     * types). Otherwise {@code null} is returned for A.
+     * <p>
+     * For a non-array type T, the result is the leaf concrete type in the current hierarchy of T.
+     * <p>
+     * A runtime may decide not to manage or walk a large hierarchy and so the result is
+     * conservative. That is, a non-null result is guaranteed to be the leaf concrete class in T's
+     * hierarchy <b>at the current point in time</b> but a null result does not necessarily imply
+     * that there is no leaf concrete class in T's hierarchy.
+     * <p>
+     * If the compiler uses the result of this method for its compilation, it must register the
+     * {@link AssumptionResult} in its {@link Assumptions} because dynamic class loading can
+     * invalidate the result of this method.
+     *
+     * @return an {@link AssumptionResult} containing the leaf concrete subclass for this type as
+     *         described above
+     */
+    AssumptionResult<ResolvedJavaType> findLeafConcreteSubtype();
+
+    ResolvedJavaType getComponentType();
+
+    default ResolvedJavaType getElementalType() {
+        ResolvedJavaType t = this;
+        while (t.isArray()) {
+            t = t.getComponentType();
+        }
+        return t;
+    }
+
+    ResolvedJavaType getArrayClass();
+
+    /**
+     * Resolves the method implementation for virtual dispatches on objects of this dynamic type.
+     * This resolution process only searches "up" the class hierarchy of this type.
+     *
+     * @param method the method to select the implementation of
+     * @param callerType the caller or context type used to perform access checks
+     * @param includeAbstract whether abstract methods should be returned. If it is {@code false}
+     *            this method behaves like {@link #resolveConcreteMethod}. This is just a temporary
+     *            parameter to highlight the changed semantics of this method. TODO (je) remove this
+     *            flag.
+     * @return the link-time resolved method (might be abstract) or {@code null} if it can not be
+     *         linked
+     */
+    ResolvedJavaMethod resolveMethod(ResolvedJavaMethod method, ResolvedJavaType callerType, boolean includeAbstract);
+
+    /**
+     * Resolves the method implementation for virtual dispatches on objects of this dynamic type.
+     * This resolution process only searches "up" the class hierarchy of this type. A broader search
+     * that also walks "down" the hierarchy is implemented by
+     * {@link #findUniqueConcreteMethod(ResolvedJavaMethod)}.
+     *
+     * @param method the method to select the implementation of
+     * @param callerType the caller or context type used to perform access checks
+     * @return the concrete method that would be selected at runtime, or {@code null} if there is no
+     *         concrete implementation of {@code method} in this type or any of its superclasses
+     */
+    ResolvedJavaMethod resolveConcreteMethod(ResolvedJavaMethod method, ResolvedJavaType callerType);
+
+    /**
+     * Given a {@link ResolvedJavaMethod} A, returns a concrete {@link ResolvedJavaMethod} B that is
+     * the only possible unique target for a virtual call on A(). Returns {@code null} if either no
+     * such concrete method or more than one such method exists. Returns the method A if A is a
+     * concrete method that is not overridden.
+     * <p>
+     * If the compiler uses the result of this method for its compilation, it must register an
+     * assumption because dynamic class loading can invalidate the result of this method.
+     *
+     * @param method the method A for which a unique concrete target is searched
+     * @return the unique concrete target or {@code null} if no such target exists or assumptions
+     *         are not supported by this runtime
+     */
+    AssumptionResult<ResolvedJavaMethod> findUniqueConcreteMethod(ResolvedJavaMethod method);
+
+    /**
+     * Returns the instance fields of this class, including
+     * {@linkplain ResolvedJavaField#isInternal() internal} fields. A zero-length array is returned
+     * for array and primitive types. The order of fields returned by this method is stable. That
+     * is, for a single JVM execution the same order is returned each time this method is called. It
+     * is also the "natural" order, which means that the JVM would expect the fields in this order
+     * if no specific order is given.
+     *
+     * @param includeSuperclasses if true, then instance fields for the complete hierarchy of this
+     *            type are included in the result
+     * @return an array of instance fields
+     */
+    ResolvedJavaField[] getInstanceFields(boolean includeSuperclasses);
+
+    /**
+     * Returns the static fields of this class, including
+     * {@linkplain ResolvedJavaField#isInternal() internal} fields. A zero-length array is returned
+     * for array and primitive types. The order of fields returned by this method is stable. That
+     * is, for a single JVM execution the same order is returned each time this method is called.
+     */
+    ResolvedJavaField[] getStaticFields();
+
+    /**
+     * Returns the annotation for the specified type of this class, if such an annotation is
+     * present.
+     *
+     * @param annotationClass the Class object corresponding to the annotation type
+     * @return this element's annotation for the specified annotation type if present on this class,
+     *         else {@code null}
+     */
+    <T extends Annotation> T getAnnotation(Class<T> annotationClass);
+
+    /**
+     * Returns the instance field of this class (or one of its super classes) at the given offset,
+     * or {@code null} if there is no such field.
+     *
+     * @param offset the offset of the field to look for
+     * @return the field with the given offset, or {@code null} if there is no such field.
+     */
+    ResolvedJavaField findInstanceFieldWithOffset(long offset, Kind expectedKind);
+
+    /**
+     * Returns name of source file of this type.
+     */
+    String getSourceFileName();
+
+    /**
+     * Returns the class file path - if available - of this type, or {@code null}.
+     */
+    URL getClassFilePath();
+
+    /**
+     * Returns {@code true} if the type is a local type.
+     */
+    boolean isLocal();
+
+    /**
+     * Returns {@code true} if the type is a member type.
+     */
+    boolean isMember();
+
+    /**
+     * Returns the enclosing type of this type, if it exists, or {@code null}.
+     */
+    ResolvedJavaType getEnclosingType();
+
+    /**
+     * Returns an array reflecting all the constructors declared by this type. This method is
+     * similar to {@link Class#getDeclaredConstructors()} in terms of returned constructors.
+     */
+    ResolvedJavaMethod[] getDeclaredConstructors();
+
+    /**
+     * Returns an array reflecting all the methods declared by this type. This method is similar to
+     * {@link Class#getDeclaredMethods()} in terms of returned methods.
+     */
+    ResolvedJavaMethod[] getDeclaredMethods();
+
+    /**
+     * Returns the {@code <clinit>} method for this class if there is one.
+     */
+    ResolvedJavaMethod getClassInitializer();
+
+    /**
+     * Returns true if this type represents an interface and it should be trusted even in places
+     * where the JVM verifier would not give any guarantees other than {@link Object}.
+     */
+    boolean isTrustedInterfaceType();
+}