/*

 * Copyright (c) 1994, 2003, 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 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 ThrowStatement extends Statement {

    Expression expr;

    /**

     * Constructor

     */

    public ThrowStatement(long where, Expression expr) {

        super(THROW, where);

        this.expr = expr;

    }

    /**

     * Check statement

     */

    Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) {

        checkLabel(env, ctx);

        try {

            vset = reach(env, vset);

            expr.checkValue(env, ctx, vset, exp);

            if (expr.type.isType(TC_CLASS)) {

                ClassDeclaration c = env.getClassDeclaration(expr.type);

                if (exp.get(c) == null) {

                    exp.put(c, this);

                }

                ClassDefinition def = c.getClassDefinition(env);

                ClassDeclaration throwable =

                    env.getClassDeclaration(idJavaLangThrowable);

                if (!def.subClassOf(env, throwable)) {

                    env.error(where, "throw.not.throwable", def);

                }

                expr = convert(env, ctx, Type.tObject, expr);

            } else if (!expr.type.isType(TC_ERROR)) {

                env.error(expr.where, "throw.not.throwable", expr.type);

            }

        } catch (ClassNotFound e) {

            env.error(where, "class.not.found", e.name, opNames[op]);

        }

        CheckContext exitctx = ctx.getTryExitContext();

        if (exitctx != null) {

            exitctx.vsTryExit = exitctx.vsTryExit.join(vset);

        }

        return DEAD_END;

    }

    /**

     * Inline

     */

    public Statement inline(Environment env, Context ctx) {

        expr = expr.inlineValue(env, ctx);

        return this;

    }

    /**

     * Create a copy of the statement for method inlining

     */

    public Statement copyInline(Context ctx, boolean valNeeded) {

        ThrowStatement s = (ThrowStatement)clone();

        s.expr = expr.copyInline(ctx);

        return s;

    }

    /**

     * The cost of inlining this statement

     */

    public int costInline(int thresh, Environment env, Context ctx) {

        return 1 + expr.costInline(thresh, env, ctx);

    }

    /**

     * Code

     */

    public void code(Environment env, Context ctx, Assembler asm) {

        expr.codeValue(env, ctx, asm);

        asm.add(where, opc_athrow);

    }

    /**

     * Print

     */

    public void print(PrintStream out, int indent) {

        super.print(out, indent);

        out.print("throw ");

        expr.print(out);

        out.print(":");

    }

}