Application: gvSIG desktop

package org.gvsig.tools.evaluator.sqljep;

import java.math.BigDecimal;

import java.util.Map;

import java.util.Map.Entry;

import org.gvsig.tools.evaluator.Evaluator;

import org.gvsig.tools.evaluator.EvaluatorData;

import org.gvsig.tools.evaluator.EvaluatorFieldValue;

import org.gvsig.tools.evaluator.EvaluatorFieldsInfo;

import org.medfoster.sqljep.BaseJEP;

import org.medfoster.sqljep.ParseException;

public class SQLJEPEvaluator extends BaseJEP implements Evaluator {

        private String expresion;

        private EvaluatorData data;

        private boolean not_parsed;

        public SQLJEPEvaluator(String expresion) {

                super(expresion);

                this.expresion = expresion;

                this.data = null;

                not_parsed = true;

        }

        public String getName() {

                return "SQLJEP(" + expresion + ")";

        }

        public String getSQL() {

                return expresion;

        }

        public String getDescription() {

                return null;

        }

        public EvaluatorFieldValue[] getFieldValues(String name) {

                return null;

        }

        public Object evaluate(EvaluatorData data) {

                this.data = data;

                Object value = null;

                try {

                        if (not_parsed) {

                                this.parseExpression();

                                not_parsed = false;

                        }

                        value = this.getValue();

                } catch (ParseException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                }

                this.data = null;

                return value;

        }

        public int findColumn(String name) {

                return -1;

        }

        public Comparable getColumnObject(int arg0) throws ParseException {

                return null;

        }

        public Entry getVariable(String name) throws ParseException {

                return new MyEntry(name);

        }

        private class MyEntry implements Map.Entry {

                private String key;

                public MyEntry(String key) {

                        this.key = key;

                }

                public Object getKey() {

                        return this.key;

                }

                public Object getValue() {

                    Object resp = null;

                        if (data.hasDataValue(key)) {

                            resp = data.getDataValue(key);

                            resp = fixDecimal(resp);

                                return resp;

                        }

                        resp = data.getDataValue(key);;

            resp = fixDecimal(resp);

                        return resp;

                }

                /**

         * @param resp

         * @return

         */

        private Object fixDecimal(Object obj) {

            if (obj instanceof Double) {

                Double dou = (Double) obj;

                String doustr = Double.toString(dou);

                return new BigDecimal(doustr);

            } else {

                if (obj instanceof Float) {

                    Float flo = (Float) obj;

                    String flostr = Float.toString(flo);

                    return new BigDecimal(flostr);

                } else {

                    return obj;

                }

            }

        }

        public Object setValue(Object arg0) {

                        return null;

                }

        }

        public EvaluatorFieldsInfo getFieldsInfo() {

                // TODO Auto-generated method stub

                return null;

        }

}