com.metamx.common.parsers.TimestampParser.java Source code

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Here is the source code for com.metamx.common.parsers.TimestampParser.java

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/*
 * Copyright 2011 - 2015 Metamarkets Group Inc.
 *
 * 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.metamx.common.parsers;

import com.google.common.base.Function;
import com.google.common.base.Preconditions;
import com.metamx.common.IAE;
import com.metamx.common.logger.Logger;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

public class TimestampParser {
    private static final Logger log = new Logger(TimestampParser.class);

    public static Function<String, DateTime> createTimestampParser(final String format) {
        if (format.equalsIgnoreCase("auto")) {
            // Could be iso or millis
            return new Function<String, DateTime>() {
                @Override
                public DateTime apply(String input) {
                    Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");

                    for (int i = 0; i < input.length(); i++) {
                        if (input.charAt(i) < '0' || input.charAt(i) > '9') {
                            return new DateTime(ParserUtils.stripQuotes(input));
                        }
                    }

                    return new DateTime(Long.parseLong(input));
                }
            };
        } else if (format.equalsIgnoreCase("iso")) {
            return new Function<String, DateTime>() {
                @Override
                public DateTime apply(String input) {
                    Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
                    return new DateTime(ParserUtils.stripQuotes(input));
                }
            };
        } else if (format.equalsIgnoreCase("posix")) {
            return new Function<String, DateTime>() {
                @Override
                public DateTime apply(String input) {
                    Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
                    return new DateTime(Long.parseLong(ParserUtils.stripQuotes(input)) * 1000);
                }
            };
        } else if (format.equalsIgnoreCase("ruby")) {
            return new Function<String, DateTime>() {
                @Override
                public DateTime apply(String input) {
                    Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
                    Double ts = Double.parseDouble(ParserUtils.stripQuotes(input));
                    Long jts = ts.longValue() * 1000; // ignoring milli secs
                    return new DateTime(jts);
                }
            };
        } else if (format.equalsIgnoreCase("millis")) {
            return new Function<String, DateTime>() {
                @Override
                public DateTime apply(String input) {
                    Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
                    return new DateTime(Long.parseLong(ParserUtils.stripQuotes(input)));
                }
            };
        } else if (format.equalsIgnoreCase("nano")) {
            return new Function<String, DateTime>() {
                @Override
                public DateTime apply(String input) {
                    Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
                    long timeNs = Long.parseLong(ParserUtils.stripQuotes(input));
                    // Convert to milliseconds, effectively: ms = floor(time in ns / 1000000)
                    return new DateTime(timeNs / 1000000L);
                }
            };
        } else {
            try {
                final DateTimeFormatter formatter = DateTimeFormat.forPattern(format);
                return new Function<String, DateTime>() {
                    @Override
                    public DateTime apply(String input) {
                        Preconditions.checkArgument(input != null && !input.isEmpty(), "null timestamp");
                        return formatter.parseDateTime(ParserUtils.stripQuotes(input));
                    }
                };
            } catch (Exception e) {
                throw new IAE(e, "Unable to parse timestamps with format [%s]", format);
            }
        }
    }
}