Application: gvSIG desktop

package org.gvsig.sldsupport.impl.sld1_0_0.parsing.expression;

import java.io.IOException;

import org.gvsig.sldsupport.exception.SLDReadException;

import org.gvsig.sldsupport.impl.util.SLDUtils;

import org.gvsig.sldsupport.sld.filter.FilterTags;

import org.gvsig.sldsupport.sld.filter.expression.SLDExpression;

import org.gvsig.sldsupport.sld.filter.expression.operator.SLDLiteral;

import org.gvsig.sldsupport.sld.filter.expression.operator.SLDPropertyName;

import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

public class ExpressionElement {

        public static SLDExpression parse(XmlPullParser parser , String version)

                        throws XmlPullParserException, IOException, SLDReadException {

                String name = parser.getName();

                if (SLDUtils.isStr(name, FilterTags.PROPERTYNAME)) {

                        SLDPropertyName pn = new SLDPropertyName();

                        String txt = parser.nextText();

                        pn.setPropertyName(txt);

                        // Go to next tag

                        parser.nextTag();

                        return pn;

                }

                if (SLDUtils.isStr(name, FilterTags.LITERAL)) {

                        SLDLiteral lit = new SLDLiteral();

                        String txt = parser.nextText();

                        lit.setValue(txt);

                        // Go to next tag

                        parser.nextTag();

                        return lit;

                }

                if (SLDUtils.isStr(name, FilterTags.ADD)

                                || SLDUtils.isStr(name, FilterTags.SUB)

                                || SLDUtils.isStr(name, FilterTags.MUL)

                                || SLDUtils.isStr(name, FilterTags.DIV)) {

                        return ArithmeticElement.parse(parser, version);

                }

                if (SLDUtils.isStr(name, FilterTags.FUNCTION)) {

                        return FunctionElement.parse(parser, version);

                }

                throw new SLDReadException("Unexpected entity in expression: " + name);

        }

}