001    /*
002     * Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved.
003     * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004     *
005     * This code is free software; you can redistribute it and/or modify it
006     * under the terms of the GNU General Public License version 2 only, as
007     * published by the Free Software Foundation.  Sun designates this
008     * particular file as subject to the "Classpath" exception as provided
009     * by Sun in the LICENSE file that accompanied this code.
010     *
011     * This code is distributed in the hope that it will be useful, but WITHOUT
012     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013     * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
014     * version 2 for more details (a copy is included in the LICENSE file that
015     * accompanied this code).
016     *
017     * You should have received a copy of the GNU General Public License version
018     * 2 along with this work; if not, write to the Free Software Foundation,
019     * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020     *
021     * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022     * CA 95054 USA or visit www.sun.com if you need additional information or
023     * have any questions.
024     */
025    
026    package javax.tools;
027    
028    import java.util.ArrayList;
029    import java.util.Collections;
030    import java.util.List;
031    
032    /**
033     * Provides an easy way to collect diagnostics in a list.
034     *
035     * @param <S> the type of source objects used by diagnostics received
036     * by this object
037     *
038     * @author Peter von der Ah&eacute;
039     * @since 1.6
040     */
041    public final class DiagnosticCollector<S> implements DiagnosticListener<S> {
042        private List<Diagnostic<? extends S>> diagnostics =
043            Collections.synchronizedList(new ArrayList<Diagnostic<? extends S>>());
044    
045        public void report(Diagnostic<? extends S> diagnostic) {
046            diagnostic.getClass(); // null check
047            diagnostics.add(diagnostic);
048        }
049    
050        /**
051         * Gets a list view of diagnostics collected by this object.
052         *
053         * @return a list view of diagnostics
054         */
055        public List<Diagnostic<? extends S>> getDiagnostics() {
056            return Collections.unmodifiableList(diagnostics);
057        }
058    }