0N/A/*
2362N/A * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage sun.tools.tree;
0N/A
0N/Aimport sun.tools.java.*;
0N/Aimport sun.tools.asm.Assembler;
0N/Aimport sun.tools.asm.Label;
0N/Aimport java.io.PrintStream;
0N/Aimport java.util.Hashtable;
0N/A
0N/A/**
0N/A * WARNING: The contents of this source file are not part of any
0N/A * supported API. Code that depends on them does so at its own risk:
0N/A * they are subject to change or removal without notice.
0N/A */
0N/Apublic
0N/Aclass CastExpression extends BinaryExpression {
0N/A /**
0N/A * constructor
0N/A */
0N/A public CastExpression(long where, Expression left, Expression right) {
0N/A super(CAST, where, left.type, left, right);
0N/A }
0N/A
0N/A /**
0N/A * Check the expression
0N/A */
0N/A public Vset checkValue(Environment env, Context ctx, Vset vset, Hashtable exp) {
0N/A type = left.toType(env, ctx);
0N/A vset = right.checkValue(env, ctx, vset, exp);
0N/A
0N/A if (type.isType(TC_ERROR) || right.type.isType(TC_ERROR)) {
0N/A // An error was already reported
0N/A return vset;
0N/A }
0N/A
0N/A if (type.equals(right.type)) {
0N/A // The types are already the same
0N/A return vset;
0N/A }
0N/A
0N/A try {
0N/A if (env.explicitCast(right.type, type)) {
0N/A right = new ConvertExpression(where, type, right);
0N/A return vset;
0N/A }
0N/A } catch (ClassNotFound e) {
0N/A env.error(where, "class.not.found", e.name, opNames[op]);
0N/A }
0N/A
0N/A // The cast is not allowed
0N/A env.error(where, "invalid.cast", right.type, type);
0N/A return vset;
0N/A }
0N/A
0N/A /**
0N/A * Check if constant
0N/A */
0N/A public boolean isConstant() {
0N/A if (type.inMask(TM_REFERENCE) && !type.equals(Type.tString)) {
0N/A // must be a primitive type, or String
0N/A return false;
0N/A }
0N/A return right.isConstant();
0N/A }
0N/A
0N/A /**
0N/A * Inline
0N/A */
0N/A public Expression inline(Environment env, Context ctx) {
0N/A return right.inline(env, ctx);
0N/A }
0N/A public Expression inlineValue(Environment env, Context ctx) {
0N/A return right.inlineValue(env, ctx);
0N/A }
0N/A
0N/A
0N/A public int costInline(int thresh, Environment env, Context ctx) {
0N/A if (ctx == null) {
0N/A return 1 + right.costInline(thresh, env, ctx);
0N/A }
0N/A // sourceClass is the current class trying to inline this method
0N/A ClassDefinition sourceClass = ctx.field.getClassDefinition();
0N/A try {
0N/A // We only allow the inlining if the current class can access
0N/A // the casting class
0N/A if (left.type.isType(TC_ARRAY) ||
0N/A sourceClass.permitInlinedAccess(env,
0N/A env.getClassDeclaration(left.type)))
0N/A return 1 + right.costInline(thresh, env, ctx);
0N/A } catch (ClassNotFound e) {
0N/A }
0N/A return thresh;
0N/A }
0N/A
0N/A
0N/A
0N/A /**
0N/A * Print
0N/A */
0N/A public void print(PrintStream out) {
0N/A out.print("(" + opNames[op] + " ");
0N/A if (type.isType(TC_ERROR)) {
0N/A left.print(out);
0N/A } else {
0N/A out.print(type);
0N/A }
0N/A out.print(" ");
0N/A right.print(out);
0N/A out.print(")");
0N/A }
0N/A}