Application: gvSIG desktop

package org.gvsig.expressionevaluator.impl.function.typeconversion;

import org.apache.commons.lang3.Range;

import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_TODOUBLE;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.spi.AbstractFunction;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dataTypes.DataTypes;

import org.gvsig.tools.dataTypes.DataTypesManager.Coercion;

public class ToDoubleFunction extends AbstractFunction {

    public ToDoubleFunction() {

        super(GROUP_CONVERSION, FUNCTION_TODOUBLE, Range.is(1));

        this.addAlias("double");

        this.addAlias("toReal");

        this.addAlias("toNumber");

    }

    @Override

    public boolean allowConstantFolding() {

        return true;

    }

    @Override

    public Object call(Interpreter interpreter, Object[] args) throws Exception {

        Coercion toStr = ToolsLocator.getDataTypesManager().getCoercion(DataTypes.DOUBLE);

        Object value = toStr.coerce(this.getObject(args, 0));

        return value;

    }

}