com.adaptris.core.fs.LastModifiedFilter.java Source code

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Here is the source code for com.adaptris.core.fs.LastModifiedFilter.java

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/*
 * Copyright 2015 Adaptris Ltd.
 * 
 * Licensed 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 com.adaptris.core.fs;

import java.io.FileFilter;
import java.util.Date;

import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.Duration;

import org.apache.commons.lang.math.NumberUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Abstract {@link FileFilter} that accepts files based on the last modified time of the file.
 */
public abstract class LastModifiedFilter implements FileFilter {
    protected transient Logger logR = LoggerFactory.getLogger(this.getClass().getName());

    private String when;

    /**
     * Default constructor
     */
    private LastModifiedFilter() {
        when = "-P30D";
    }

    /**
     * Create the filefilter using an ISO8601 formatted interval.
     *
     * @param s the iso8601 interval or the absolute time (MS since epoch)
     */
    public LastModifiedFilter(String s) {
        this();
        when = s;
    }

    protected Date filterDate() throws Exception {
        Date filterDate = new Date();
        if (NumberUtils.isDigits(when)) {
            filterDate.setTime(Long.parseLong(when));
        } else {
            Duration duration = DatatypeFactory.newInstance().newDuration(when);
            duration.addTo(filterDate);
        }
        return filterDate;
    }
}