svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / function / date / TimestampFunction.java @ 44338
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package org.gvsig.expressionevaluator.impl.function.date; |
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import java.text.ParseException; |
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import java.text.SimpleDateFormat; |
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import java.util.Date; |
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import org.apache.commons.lang3.Range; |
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import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_TIMESTAMP; |
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import org.gvsig.expressionevaluator.Interpreter; |
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import org.gvsig.expressionevaluator.spi.AbstractFunction; |
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public class TimestampFunction extends AbstractFunction { |
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public TimestampFunction() {
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super("Date", FUNCTION_TIMESTAMP,Range.between(1,2), |
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"Returns a time stamp from the arguments",
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FUNCTION_TIMESTAMP+"({{timestamp}}, format)",
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new String[]{ |
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"timestamp - a string with a date/time",
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"format - Optional. Format to use to parse the timestamp"
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}, |
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"Timestamp"
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); |
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} |
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@Override
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public boolean allowConstantFolding() { |
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return true; |
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} |
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@Override
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public Object call(Interpreter interpreter, Object[] args) { |
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Object date_obj = getObject(args, 0); |
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if( date_obj instanceof Date ) { |
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return date_obj;
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} |
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String date = getStr(args, 0); |
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String format = null; |
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if( args.length==2 ) { |
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format = getStr(args, 1);
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} |
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SimpleDateFormat df = new SimpleDateFormat(); |
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if( format != null ) { |
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df.applyPattern(format); |
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} |
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try {
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Date x = df.parse(date);
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return x;
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} catch (ParseException ex) { |
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throw new RuntimeException("Can't parse date value '"+date+"' with format '"+format==null?"":format+"'", ex); |
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} |
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} |
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} |