Mercurial > hg > graal-compiler
view graal/com.oracle.graal.api.meta/src/com/oracle/graal/api/meta/ConstantPool.java @ 18319:56cc1a799a60
(re)converted Value to an interface
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 07 Nov 2014 22:00:11 +0100 |
parents | fa6c97ede679 |
children | 2906b3cc3e2f |
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/* * 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.graal.api.meta; /** * Represents the runtime representation of the constant pool that is used by the compiler when * parsing bytecode. Provides methods to look up a constant pool entry without performing * resolution. They are used during compilation. */ public interface ConstantPool extends Remote { /** * Returns the number of entries the constant pool. * * @return number of entries in the constant pool */ int length(); /** * Ensures that the type referenced by the specified constant pool entry is loaded and * initialized. This can be used to compile time resolve a type. It works for field, method, or * type constant pool entries. * * @param cpi the index of the constant pool entry that references the type * @param opcode the opcode of the instruction that references the type */ void loadReferencedType(int cpi, int opcode); /** * Looks up a reference to a field. If {@code opcode} is non-negative, then resolution checks * specific to the bytecode it denotes are performed if the field is already resolved. Should * any of these checks fail, an unresolved field reference is returned. * * @param cpi the constant pool index * @param opcode the opcode of the instruction for which the lookup is being performed or * {@code -1} * @return a reference to the field at {@code cpi} in this pool * @throws ClassFormatError if the entry at {@code cpi} is not a field */ JavaField lookupField(int cpi, int opcode); /** * Looks up a reference to a method. If {@code opcode} is non-negative, then resolution checks * specific to the bytecode it denotes are performed if the method is already resolved. Should * any of these checks fail, an unresolved method reference is returned. * * @param cpi the constant pool index * @param opcode the opcode of the instruction for which the lookup is being performed or * {@code -1} * @return a reference to the method at {@code cpi} in this pool * @throws ClassFormatError if the entry at {@code cpi} is not a method */ JavaMethod lookupMethod(int cpi, int opcode); /** * Looks up a reference to a type. If {@code opcode} is non-negative, then resolution checks * specific to the bytecode it denotes are performed if the type is already resolved. Should any * of these checks fail, an unresolved type reference is returned. * * @param cpi the constant pool index * @param opcode the opcode of the instruction for which the lookup is being performed or * {@code -1} * @return a reference to the compiler interface type */ JavaType lookupType(int cpi, int opcode); /** * Looks up an Utf8 string. * * @param cpi the constant pool index * @return the Utf8 string at index {@code cpi} in this constant pool */ String lookupUtf8(int cpi); /** * Looks up a method signature. * * @param cpi the constant pool index * @return the method signature at index {@code cpi} in this constant pool */ Signature lookupSignature(int cpi); /** * Looks up a constant at the specified index. * * @param cpi the constant pool index * @return the {@code Constant} or {@code JavaType} instance representing the constant pool * entry */ Object lookupConstant(int cpi); /** * Looks up the appendix at the specified index. * * @param cpi the constant pool index * @param opcode the opcode of the instruction for which the lookup is being performed or * {@code -1} * @return the appendix if it exists and is resolved or {@code null} */ JavaConstant lookupAppendix(int cpi, int opcode); }