/*
 * 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
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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.
/** * 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
/** * 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 */
@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
/** * 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
/** * 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
/** * 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
/** * 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
/** * 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
/** * 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>"); } } }