Application: gvSIG desktop

import java.util.Collections;

import org.apache.commons.lang3.StringUtils;

import org.gvsig.expressionevaluator.ExpressionEvaluator;

import org.gvsig.expressionevaluator.Function;

import org.gvsig.expressionevaluator.impl.function.numeric.ACosFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.ASinFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.ATanFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.AbsFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.BitAndFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.BitOrFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.BitXorFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.CeilFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.CosFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.CoshFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.CotFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.DegreesFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.ExpFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.FloorFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.Log10Function;

import org.gvsig.expressionevaluator.impl.function.numeric.LogFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.PiFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.PowFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.RadiansFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.RandFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.RoundFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.SignFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.SinFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.SinhFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.SqrtFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.TanFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.TanhFunction;

import org.gvsig.expressionevaluator.impl.function.numeric.ZeroFunction;

import org.gvsig.expressionevaluator.impl.function.obj.GetattrFunction;

import org.gvsig.expressionevaluator.impl.function.obj.InvokeMethodFunction;

import org.gvsig.expressionevaluator.impl.function.operator.AddOperator;

import org.gvsig.expressionevaluator.impl.function.operator.AndOperator;

import org.gvsig.expressionevaluator.impl.function.operator.DivOperator;

import org.gvsig.expressionevaluator.impl.function.operator.EqOperator;

import org.gvsig.expressionevaluator.impl.function.operator.GeOperator;

import org.gvsig.expressionevaluator.impl.function.operator.GtOperator;

import org.gvsig.expressionevaluator.impl.function.operator.LeOperator;

import org.gvsig.expressionevaluator.impl.function.operator.LtOperator;

import org.gvsig.expressionevaluator.impl.function.operator.ModOperator;

import org.gvsig.expressionevaluator.impl.function.operator.MulOperator;

import org.gvsig.expressionevaluator.impl.function.operator.NeOperator;

import org.gvsig.expressionevaluator.impl.function.operator.NotOperator;

import org.gvsig.expressionevaluator.impl.function.operator.OrOperator;

import org.gvsig.expressionevaluator.impl.function.operator.SubstOperator;

import org.gvsig.expressionevaluator.impl.function.predicate.IlikeOperator;

import org.gvsig.expressionevaluator.impl.function.predicate.LikeOperator;

import org.gvsig.expressionevaluator.impl.function.spatial.STAreaFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STAsTextFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STBufferFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STCentroidFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STContainsFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STConvexHullFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STCoveredByFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STCoversFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STCrossesFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STDifferenceFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STDimensionFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STDisjointFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STDistanceFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STEndPointFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STEnvelopeFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STGeomFromTextFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STGeometryNFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STIntersectionFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STIntersectsFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STIsSimpleFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STIsValidFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STNumGeometriesFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STNumPointsFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STOverlapsFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STPointNFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STStartPointFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STTouchesFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STUnionFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STWithinFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STXFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STYFunction;

import org.gvsig.expressionevaluator.impl.function.spatial.STZFunction;

import org.gvsig.expressionevaluator.impl.function.string.AsciiFunction;

import org.gvsig.expressionevaluator.impl.function.string.CharFunction;

import org.gvsig.expressionevaluator.impl.function.string.ConcatFunction;

import org.gvsig.expressionevaluator.impl.function.string.InstrFunction;

import org.gvsig.expressionevaluator.impl.function.string.LTrimFunction;

import org.gvsig.expressionevaluator.impl.function.string.LeftFunction;

import org.gvsig.expressionevaluator.impl.function.string.LengthFunction;

import org.gvsig.expressionevaluator.impl.function.string.LocateFunction;

import org.gvsig.expressionevaluator.impl.function.string.LowerFunction;

import org.gvsig.expressionevaluator.impl.function.string.LpadFunction;

import org.gvsig.expressionevaluator.impl.function.string.PositionFunction;

import org.gvsig.expressionevaluator.impl.function.string.RTrimFunction;

import org.gvsig.expressionevaluator.impl.function.string.RepeatFunction;

import org.gvsig.expressionevaluator.impl.function.string.ReplaceFunction;

import org.gvsig.expressionevaluator.impl.function.string.RightFunction;

import org.gvsig.expressionevaluator.impl.function.string.RpadFunction;

import org.gvsig.expressionevaluator.impl.function.string.SpaceFunction;

import org.gvsig.expressionevaluator.impl.function.string.SubstringFunction;

import org.gvsig.expressionevaluator.impl.function.string.TrimFunction;

import org.gvsig.expressionevaluator.impl.function.string.UpperFunction;

import org.gvsig.fmap.dal.EvaluatorFactory;

import org.gvsig.expressionevaluator.integration.DefaultEvaluatorFactory;

import org.gvsig.expressionevaluator.integration.DefaultExpressionEvaluator;

    private final Map<String,Function> functions;

    private final Map<String,Function> operators;

        this.functions = new HashMap<>();

        this.operators = new HashMap<>();

        initFunctionsAndOperators();

    private void initFunctionsAndOperators() {

        this.addFunction(new GetattrFunction());

        this.addFunction(new InvokeMethodFunction());

        this.addOperator(new AndOperator());

        this.addOperator(new AddOperator());

        this.addOperator(new DivOperator());

        this.addOperator(new EqOperator());

        this.addOperator(new GeOperator());

        this.addOperator(new GtOperator());

        this.addOperator(new LeOperator());

        this.addOperator(new LtOperator());

        this.addOperator(new ModOperator());

        this.addOperator(new NeOperator());

        this.addOperator(new ModOperator());

        this.addOperator(new MulOperator());

        this.addOperator(new NeOperator());

        this.addOperator(new NotOperator());

        this.addOperator(new OrOperator());

        this.addOperator(new SubstOperator());

        this.addOperator(new IlikeOperator());

        this.addOperator(new LikeOperator());

        this.addFunction(new ACosFunction());

        this.addFunction(new ASinFunction());

        this.addFunction(new ATanFunction());

        this.addFunction(new AbsFunction());

        this.addFunction(new BitAndFunction());

        this.addFunction(new BitOrFunction());

        this.addFunction(new BitXorFunction());

        this.addFunction(new CeilFunction());

        this.addFunction(new CosFunction());

        this.addFunction(new CoshFunction());

        this.addFunction(new CotFunction());

        this.addFunction(new DegreesFunction());

        this.addFunction(new ExpFunction());

        this.addFunction(new FloorFunction());

        this.addFunction(new Log10Function());

        this.addFunction(new LogFunction());

        this.addFunction(new PiFunction());

        this.addFunction(new PowFunction());

        this.addFunction(new RadiansFunction());

        this.addFunction(new RandFunction());

        this.addFunction(new RoundFunction());

        this.addFunction(new SignFunction());

        this.addFunction(new SinFunction());

        this.addFunction(new SinhFunction());

        this.addFunction(new SqrtFunction());

        this.addFunction(new TanFunction());

        this.addFunction(new TanhFunction());

        this.addFunction(new ZeroFunction());

        this.addFunction(new LogFunction());

        this.addFunction(new AsciiFunction());

        this.addFunction(new CharFunction());

        this.addFunction(new ConcatFunction());

        this.addFunction(new InstrFunction());

        this.addFunction(new LTrimFunction());

        this.addFunction(new LeftFunction());

        this.addFunction(new LengthFunction());

        this.addFunction(new LocateFunction());

        this.addFunction(new LowerFunction());

        this.addFunction(new LpadFunction());

        this.addFunction(new PositionFunction());

        this.addFunction(new RTrimFunction());

        this.addFunction(new RepeatFunction());

        this.addFunction(new ReplaceFunction());

        this.addFunction(new RightFunction());

        this.addFunction(new RpadFunction());

        this.addFunction(new SpaceFunction());

        this.addFunction(new SubstringFunction());

        this.addFunction(new TrimFunction());

        this.addFunction(new UpperFunction());

        this.addFunction(new STAreaFunction());

        this.addFunction(new STAsTextFunction());

        this.addFunction(new STBufferFunction());

        this.addFunction(new STCentroidFunction());

        this.addFunction(new STContainsFunction());

        this.addFunction(new STConvexHullFunction());

        this.addFunction(new STCoveredByFunction());

        this.addFunction(new STCoversFunction());

        this.addFunction(new STCrossesFunction());

        this.addFunction(new STDifferenceFunction());

        this.addFunction(new STDimensionFunction());

        this.addFunction(new STDisjointFunction());

        this.addFunction(new STDistanceFunction());

        this.addFunction(new STEndPointFunction());

        this.addFunction(new STEnvelopeFunction());

        this.addFunction(new STGeomFromTextFunction());

        this.addFunction(new STGeometryNFunction());

        this.addFunction(new STIntersectionFunction());

        this.addFunction(new STIntersectsFunction());

        this.addFunction(new STIsSimpleFunction());

        this.addFunction(new STIsValidFunction());

        this.addFunction(new STNumGeometriesFunction());

        this.addFunction(new STNumPointsFunction());

        this.addFunction(new STOverlapsFunction());

        this.addFunction(new STPointNFunction());

        this.addFunction(new STStartPointFunction());

        this.addFunction(new STTouchesFunction());

        this.addFunction(new STUnionFunction());

        this.addFunction(new STWithinFunction());

        this.addFunction(new STXFunction());

        this.addFunction(new STYFunction());

        this.addFunction(new STZFunction());

    }

    public Map<String, Function> getAllFunctions() {

        return Collections.unmodifiableMap(functions);

    public Map<String, Function> getAllOperators() {

        return Collections.unmodifiableMap(operators);

    public void addFunction(Function function) {

        this.functions.put(function.name().toUpperCase(), function);

    public void addOperator(Function function) {

        this.operators.put(function.name().toUpperCase(), function);

    }

    public void removeFunction(String name) {

        if( StringUtils.isEmpty(name) ) {

            return;

        }

        this.functions.remove(name.toUpperCase());

    }

    public ExpressionEvaluator createEvaluator(String expression) {

        DefaultExpressionEvaluator e = new DefaultExpressionEvaluator();

        e.setSource(expression);

        return e;

    }

    @Override

    public ExpressionEvaluator createEvaluator() {

        return new DefaultExpressionEvaluator();

    }

    @Override

    public EvaluatorFactory createEvaluatorFactory() {

        return new DefaultEvaluatorFactory();

    }

    @Override