/*

 * Copyright (c) 2006, 2014, 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 javax.tools;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import java.util.Objects;

/**

 * Provides an easy way to collect diagnostics in a list.

 *

 * @param <S> the type of source objects used by diagnostics received

 * by this object

 *

 * @author Peter von der Ahé

 * @since 1.6

 */

public final class DiagnosticCollector<S> implements DiagnosticListener<S> {

    private List<Diagnostic<? extends S>> diagnostics =

            Collections.synchronizedList(new ArrayList<Diagnostic<? extends S>>());

    public void report(Diagnostic<? extends S> diagnostic) {

        Objects.requireNonNull(diagnostic);

        diagnostics.add(diagnostic);

    }

    /**

     * Returns a list view of diagnostics collected by this object.

     *

     * @return a list view of diagnostics

     */

    public List<Diagnostic<? extends S>> getDiagnostics() {

        return Collections.unmodifiableList(diagnostics);

    }

}