org.kalypsodeegree_impl.io.sax.parser.ContentHandlerUtils.java Source code

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Here is the source code for org.kalypsodeegree_impl.io.sax.parser.ContentHandlerUtils.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 * 
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 * 
 *  and
 *  
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 * 
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 * 
 *  This library 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
 *  Lesser General Public License for more details.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 *  Contact:
 * 
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 *   
 *  ---------------------------------------------------------------------------*/
package org.kalypsodeegree_impl.io.sax.parser;

import org.apache.commons.lang3.StringUtils;
import org.kalypso.contribs.org.xml.sax.AttributesUtilities;
import org.xml.sax.Attributes;

/**
 * Common helper code for gml sax parsing.
 * 
 * @author Gernot Belger
 * @author Felipe Maximino
 */
public final class ContentHandlerUtils {
    private ContentHandlerUtils() {
        throw new UnsupportedOperationException("Helper class, do not instantiate");
    }

    private static String parseStringFromAttributes(final Attributes attributes, final String attribute,
            final String defaultValue) {
        final String value = AttributesUtilities.getAttributeValue(attributes, "", attribute, null);
        if (value == null)
            return defaultValue;

        return value;
    }

    /** Get srs from attributes, fallback to default crs */
    public static String parseSrsFromAttributes(final Attributes attributes, final String defaultSrs) {
        final String srs = parseStringFromAttributes(attributes, "srsName", defaultSrs);
        if (srs == null)
            return null;

        // BUGFIX/REMARK: preserve memory by intern'ing the srs strings. Especially for bigger gml's this can have a major
        // effect, as every srs string was being kept separately in memory.
        return srs.intern();
    }

    public static String parseCsFromAttributes(final Attributes attributes, final String defaultCs) {
        return parseStringFromAttributes(attributes, "cs", defaultCs);
    }

    public static String parseTsFromAttributes(final Attributes attributes, final String defaultTs) {
        return parseStringFromAttributes(attributes, "ts", defaultTs);
    }

    public static String parseDecimalFromAttributes(final Attributes attributes, final String defaultDecimal) {
        return parseStringFromAttributes(attributes, "decimal", defaultDecimal);
    }

    public static Integer parseSrsDimensionFromAttributes(final Attributes attributes) {
        return AttributesUtilities.getAttributeIntegerValue(attributes, "", "srsDimension", null);
    }

    public static Integer parseCountFromAttributes(final Attributes attributes) {
        return AttributesUtilities.getAttributeIntegerValue(attributes, "", "count", null);
    }

    public static double[] parseDoublesString(final String text) {
        final String[] split = StringUtils.split(text);
        final double[] result = new double[split.length];
        for (int i = 0; i < result.length; i++)
            result[i] = Double.valueOf(split[i]);
        return result;
    }
}