Application: gvSIG desktop

import javax.json.JsonObject;

import org.gvsig.expressionevaluator.spi.BaseExpressionEvaluator;

import org.gvsig.json.Json;

import org.gvsig.json.JsonObjectBuilder;

    @Override

    public void fromJson(JsonObject json) {

        ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager();

        this.symbolTable = manager.createSymbolTable();

        this.featureSymbolTable = new FeatureSymbolTableImpl();

        this.symbolTable.addSymbolTable(this.featureSymbolTable);

        this.availableOperators = null;

        this.availableFunctions = null;

        this.expression = (Expression) Json.toObject(json, "expression");

    }

    @Override

    public JsonObjectBuilder toJsonBuilder() {

        JsonObjectBuilder state = Json.createObjectBuilder();

        state.add("expression", this.expression);

        return state;

    }