org.openehealth.coala.util.PXSDateConverterImpl.java Source code

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Here is the source code for org.openehealth.coala.util.PXSDateConverterImpl.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.openehealth.coala.util;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import org.apache.commons.lang.StringUtils;
import org.openehealth.coala.xds.XDSConfigurationImpl;

/**
 * This class offers conversion Methods for PXS Dates. Define the patterns used
 * in coala-document.properties.
 * 
 * @author kmaerz
 */
public class PXSDateConverterImpl implements PXSDateConverter {

    private XDSConfigurationImpl xdsConfiguration;

    /**
     * The pattern to use for Date formatting
     */
    private static String longPattern = "yyyyMMddHHmmss";
    private static String shortPattern = "yyyyMMdd";

    /**
     * Converts a PXS date representation into an {@link Date}. The String needs
     * to be at least the length of shortpattern (defined in
     * coala-document.properties).
     * 
     * @param pxsDate
     *            the pxs dates string. Must be at least the length of
     *            shortpattern (defined in coala-document.properties) only
     *            contain numbers
     * @return A {@link Date} that represents the same time as the date string
     */
    public Date stringToDate(String pxsDate) {
        // Basic Checks
        if (pxsDate == null)
            throw new IllegalArgumentException("pxsDate cannot be null");
        if (pxsDate.length() < shortPattern.length())
            throw new IllegalArgumentException("pxsDate must be at least eight digits long");
        if (!StringUtils.isNumeric(pxsDate))
            throw new IllegalArgumentException("pxsDate must be strictly numeric");

        // Fill pxsDate with trailing zeroes if too short
        while (pxsDate.length() < longPattern.length())
            pxsDate += "0";

        try {
            SimpleDateFormat sdf = new SimpleDateFormat(longPattern, Locale.GERMAN);
            Date result = sdf.parse(pxsDate);
            return result;
        } catch (Exception e) {
            throw new RuntimeException(
                    "Could not convert PXS Date representation to java Date. Invalid DateString was: " + pxsDate,
                    e);
        }

    }

    /**
     * Formats a {@link Date} into a String according to the PXS specification.
     * The pattern can be specified in the coala-document.properties file.
     * 
     * @param pxsDate
     *            the {@link Date} that needs to be converted to a String
     * @return the String representing the given {@link Date}
     */
    public String DateToString(Date pxsDate) {
        SimpleDateFormat formatter = new SimpleDateFormat(longPattern);
        return formatter.format(pxsDate);
    }

    /**
     * Formats a {@link Date} into a String according to the PXS specification.
     * The pattern can be specified in the coala-document.properties file. This
     * Method uses the short string version, e.g. for birthDates
     * 
     * @param pxsDate
     *            the {@link Date} that needs to be converted to a String
     * @return the String representing the given {@link Date}
     */
    public String DateToShortString(Date pxsDate) {
        SimpleDateFormat formatter = new SimpleDateFormat(shortPattern);
        return formatter.format(pxsDate);
    }

    /*
     * Needed for Spring
     */
    public void setXdsConfiguration(XDSConfigurationImpl xdsConfiguration) {
        this.xdsConfiguration = xdsConfiguration;
        if (xdsConfiguration.getLongDatePattern() != null)
            PXSDateConverterImpl.longPattern = xdsConfiguration.getLongDatePattern();
        if (xdsConfiguration.getShortDatePattern() != null)
            PXSDateConverterImpl.shortPattern = xdsConfiguration.getShortDatePattern();
    }

    /*
     * Needed for Spring
     */
    public XDSConfigurationImpl getXdsConfiguration() {
        return xdsConfiguration;
    }

}