5a17acfd70
git-svn-id: http://google-refine.googlecode.com/svn/trunk@1613 7d457c2a-affb-35e4-300a-418c747d4874
92 lines
3.9 KiB
Java
92 lines
3.9 KiB
Java
/*
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Copyright 2010, Google Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following disclaimer
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in the documentation and/or other materials provided with the
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distribution.
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* Neither the name of Google Inc. nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.google.refine.expr.functions.date;
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import java.util.Calendar;
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import java.util.Properties;
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import org.json.JSONException;
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import org.json.JSONWriter;
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import com.google.refine.expr.EvalError;
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import com.google.refine.grel.ControlFunctionRegistry;
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import com.google.refine.grel.Function;
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public class Inc implements Function {
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public Object call(Properties bindings, Object[] args) {
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if (args.length == 3 &&
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args[0] != null && args[0] instanceof Calendar &&
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args[1] != null && args[1] instanceof Number &&
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args[2] != null && args[2] instanceof String) {
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Calendar date = (Calendar) args[0];
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int amount = ((Number) args[1]).intValue();
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String unit = (String) args[2];
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date.add(getField(unit), amount);
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return date;
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}
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return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a date, a number and a string");
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}
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private int getField(String unit) {
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if ("hours".equals(unit) || "hour".equals(unit) || "h".equals(unit)) {
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return Calendar.HOUR;
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} else if ("days".equals(unit) || "day".equals(unit) || "d".equals(unit)) {
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return Calendar.DAY_OF_MONTH;
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} else if ("years".equals(unit) || "year".equals(unit)) {
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return Calendar.YEAR;
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} else if ("months".equals(unit) || "month".equals(unit)) { // avoid 'm' to avoid confusion with minute
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return Calendar.MONTH;
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} else if ("minutes".equals(unit) || "minute".equals(unit) || "min".equals(unit)) { // avoid 'm' to avoid confusion with month
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return Calendar.MINUTE;
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} else if ("weeks".equals(unit) || "week".equals(unit) || "w".equals(unit)) {
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return Calendar.WEEK_OF_MONTH;
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} else if ("seconds".equals(unit) || "sec".equals(unit) || "s".equals(unit)) {
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return Calendar.SECOND;
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} else {
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throw new RuntimeException("Unit '" + unit + "' not recognized.");
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}
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}
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public void write(JSONWriter writer, Properties options) throws JSONException {
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writer.object();
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writer.key("description"); writer.value("Returns a date changed by the given amount in the given unit of time");
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writer.key("params"); writer.value("date d, number value, string unit (default to 'hour')");
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writer.key("returns"); writer.value("date");
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writer.endObject();
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}
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}
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