svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.time / org.gvsig.expressionevaluator.time.lib / org.gvsig.expressionevaluator.time.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / function / date / RelativeInstantFunction.java @ 44644
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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 java.util.Objects; |
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import org.apache.commons.lang3.Range; |
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import org.gvsig.expressionevaluator.Interpreter; |
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import org.gvsig.expressionevaluator.spi.AbstractFunction; |
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import org.gvsig.timesupport.DataTypes; |
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import org.gvsig.timesupport.RelativeInstant; |
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import org.gvsig.timesupport.TimeSupportLocator; |
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import org.gvsig.tools.ToolsLocator; |
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import org.gvsig.tools.dataTypes.CoercionException; |
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import org.gvsig.tools.dataTypes.DataTypesManager; |
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public class RelativeInstantFunction extends AbstractFunction { |
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private final DataTypesManager.Coercion toInstant; |
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public RelativeInstantFunction() {
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super("Date", "RelativeInstant",Range.is(1), |
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"Returns a relative instant from the arguments",
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"RelativeInstant({{date}}, format)",
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new String[]{ |
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"date - a string with a date",
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"format - Optional. Format to use to parse the date"
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}, |
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"RelativeInstant",
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false
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); |
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this.toInstant = ToolsLocator.getDataTypesManager().getCoercion(DataTypes.INSTANT);
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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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if( args.length==1 ) { |
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Object arg0 = getObject(args, 0); |
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try {
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Object instant = this.toInstant.coerce(arg0); |
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return instant;
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} catch (CoercionException ex) {
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throw new RuntimeException("Can't convert value '"+Objects.toString(arg0, "")+"' to instant.", ex); |
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} |
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} |
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String format = getStr(args, 1); |
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String date = getStr(args, 0); |
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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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RelativeInstant instant = TimeSupportLocator.getManager().createRelativeInstant(x); |
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return instant;
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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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} |