de.dhke.projects.cutil.stringer.CollectionStringer.java Source code

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Here is the source code for de.dhke.projects.cutil.stringer.CollectionStringer.java

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/**
 * (c) 2009-2014 Peter Wullinger
 *
 * $Id$
 *
 * Use, modification and restribution of this file are covered by the
 * terms of the Artistic License 2.0.
 *
 * You should have received a copy of the license terms in a file named
 * "LICENSE" together with this software package.
 *
 * Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT
 * HOLDER AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES. THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
 * A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE
 * EXTENT PERMITTED BY YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO
 * COPYRIGHT HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT
 * OF THE USE OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 **/
package de.dhke.projects.cutil.stringer;

import java.util.Collection;
import java.util.Map;
import org.apache.commons.collections15.MultiMap;

/**
 *
 * @author Peter Wullinger <java@dhke.de>
 */
@SupportsType({ Collection.class, Map.class, MultiMap.class })
public class CollectionStringer extends AbstractAnnotationStringer {

    public CollectionStringer() {
    }

    @Override
    public void append(StringBuilder sb, Object obj, final IToStringConverter backStringer) {
        if (obj instanceof Collection) {
            boolean first = true;
            sb.append("[");
            for (Object subObj : (Collection) obj) {
                if (first) {
                    first = false;
                } else
                    sb.append(", ");
                backStringer.append(sb, subObj, backStringer);
            }
            sb.append("]");
        } else if (obj instanceof Map) {
            final Map<?, ?> map = (Map<?, ?>) obj;
            boolean first = true;
            sb.append("{");
            for (Map.Entry<?, ?> entry : map.entrySet()) {
                if (first) {
                    first = false;
                } else
                    sb.append(", ");
                backStringer.append(sb, entry.getKey(), backStringer);
                sb.append(": ");
                backStringer.append(sb, entry.getValue(), backStringer);
            }
            sb.append("}");
        } else if (obj instanceof MultiMap) {
            final MultiMap<?, ?> mMap = (MultiMap<?, ?>) obj;
            backStringer.append(sb, mMap.map(), backStringer);
        } else
            sb.append(obj);
    }
}