| /* |
| * Copyright (c) 1994, 2004, 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 sun.tools.tree; |
| |
| import sun.tools.java.*; |
| import sun.tools.asm.Assembler; |
| import sun.tools.asm.LocalVariable; |
| import sun.tools.asm.Label; |
| import java.io.PrintStream; |
| import java.util.Hashtable; |
| |
| /** |
| * WARNING: The contents of this source file are not part of any |
| * supported API. Code that depends on them does so at its own risk: |
| * they are subject to change or removal without notice. |
| */ |
| public |
| class CatchStatement extends Statement { |
| int mod; |
| Expression texpr; |
| Identifier id; |
| Statement body; |
| LocalMember field; |
| |
| /** |
| * Constructor |
| */ |
| public CatchStatement(long where, Expression texpr, IdentifierToken id, Statement body) { |
| super(CATCH, where); |
| this.mod = id.getModifiers(); |
| this.texpr = texpr; |
| this.id = id.getName(); |
| this.body = body; |
| } |
| /** @deprecated */ |
| @Deprecated |
| public CatchStatement(long where, Expression texpr, Identifier id, Statement body) { |
| super(CATCH, where); |
| this.texpr = texpr; |
| this.id = id; |
| this.body = body; |
| } |
| |
| /** |
| * Check statement |
| */ |
| Vset check(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp) { |
| vset = reach(env, vset); |
| ctx = new Context(ctx, this); |
| Type type = texpr.toType(env, ctx); |
| |
| try { |
| if (ctx.getLocalField(id) != null) { |
| env.error(where, "local.redefined", id); |
| } |
| |
| if (type.isType(TC_ERROR)) { |
| // error message printed out elsewhere |
| } else if (!type.isType(TC_CLASS)) { |
| env.error(where, "catch.not.throwable", type); |
| } else { |
| ClassDefinition def = env.getClassDefinition(type); |
| if (!def.subClassOf(env, |
| env.getClassDeclaration(idJavaLangThrowable))) { |
| env.error(where, "catch.not.throwable", def); |
| } |
| } |
| |
| field = new LocalMember(where, ctx.field.getClassDefinition(), mod, type, id); |
| ctx.declare(env, field); |
| vset.addVar(field.number); |
| |
| return body.check(env, ctx, vset, exp); |
| } catch (ClassNotFound e) { |
| env.error(where, "class.not.found", e.name, opNames[op]); |
| return vset; |
| } |
| } |
| |
| /** |
| * Inline |
| */ |
| public Statement inline(Environment env, Context ctx) { |
| ctx = new Context(ctx, this); |
| if (field.isUsed()) { |
| ctx.declare(env, field); |
| } |
| if (body != null) { |
| body = body.inline(env, ctx); |
| } |
| return this; |
| } |
| |
| /** |
| * Create a copy of the statement for method inlining |
| */ |
| public Statement copyInline(Context ctx, boolean valNeeded) { |
| CatchStatement s = (CatchStatement)clone(); |
| if (body != null) { |
| s.body = body.copyInline(ctx, valNeeded); |
| } |
| if (field != null) { |
| s.field = field.copyInline(ctx); |
| } |
| return s; |
| } |
| |
| /** |
| * Compute cost of inlining this statement |
| */ |
| public int costInline(int thresh, Environment env, Context ctx){ |
| int cost = 1; |
| if (body != null) { |
| cost += body.costInline(thresh, env,ctx); |
| } |
| return cost; |
| } |
| |
| /** |
| * Code |
| */ |
| public void code(Environment env, Context ctx, Assembler asm) { |
| CodeContext newctx = new CodeContext(ctx, this); |
| if (field.isUsed()) { |
| newctx.declare(env, field); |
| asm.add(where, opc_astore, new LocalVariable(field, field.number)); |
| } else { |
| asm.add(where, opc_pop); |
| } |
| if (body != null) { |
| body.code(env, newctx, asm); |
| } |
| //asm.add(newctx.breakLabel); |
| } |
| |
| /** |
| * Print |
| */ |
| public void print(PrintStream out, int indent) { |
| super.print(out, indent); |
| out.print("catch ("); |
| texpr.print(out); |
| out.print(" " + id + ") "); |
| if (body != null) { |
| body.print(out, indent); |
| } else { |
| out.print("<empty>"); |
| } |
| } |
| } |