/*

 * Copyright (c) 2003, 2010, 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 com.sun.tools.javac.util;

import com.sun.tools.javac.code.Lint.LintCategory;

import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;

import java.util.EnumSet;

/**

 * An interface to support optional warnings, needed for support of

 * unchecked conversions and unchecked casts.

 *

 * <p><b>This is NOT part of any supported API.

 * If you write code that depends on this, you do so at your own risk.

 * This code and its internal interfaces are subject to change or

 * deletion without notice.</b>

 */

public class Warner {

    private DiagnosticPosition pos = null;

    protected boolean warned = false;

    private EnumSet<LintCategory> nonSilentLintSet = EnumSet.noneOf(LintCategory.class);

    private EnumSet<LintCategory> silentLintSet = EnumSet.noneOf(LintCategory.class);

    public DiagnosticPosition pos() {

        return pos;

    }

    public void warn(LintCategory lint) {

        nonSilentLintSet.add(lint);

    }

    public void silentWarn(LintCategory lint) {

        silentLintSet.add(lint);

    }

    public Warner(DiagnosticPosition pos) {

        this.pos = pos;

    }

    public boolean hasSilentLint(LintCategory lint) {

        return silentLintSet.contains(lint);

    }

    public boolean hasNonSilentLint(LintCategory lint) {

        return nonSilentLintSet.contains(lint);

    }

    public boolean hasLint(LintCategory lint) {

        return hasSilentLint(lint) ||

                hasNonSilentLint(lint);

    }

    public void clear() {

        nonSilentLintSet.clear();

        silentLintSet.clear();

        this.warned = false;

    }

    public Warner() {

        this(null);

    }

}