Application: gvSIG desktop

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package org.gvsig.expressionevaluator.swing.impl;

import org.gvsig.expressionevaluator.swing.CalculatorController;

import java.util.Objects;

import javax.swing.text.JTextComponent;

import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator;

import org.gvsig.expressionevaluator.ExpressionEvaluatorManager;

import org.gvsig.expressionevaluator.MutableSymbolTable;

import org.gvsig.expressionevaluator.SymbolTable;

import org.gvsig.tools.dataTypes.DataTypes;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dataTypes.CoercionException;

import org.gvsig.tools.dataTypes.DataTypesManager;

/**

 *

 * @author jjdelcerro

 */

class DefaultCalculatorController<T> implements CalculatorController<T> {

    private final JTextComponent text;

    private final int dataType;

    private final MutableSymbolTable defaultSymbolTable;

    public DefaultCalculatorController(JTextComponent text, int dataType) {

        this.text = text;

        this.dataType = dataType;

        this.defaultSymbolTable = ExpressionEvaluatorLocator.getManager().createSymbolTable();

    }

    @Override

    public void addSymbolTable(SymbolTable symbolTable) {

        this.defaultSymbolTable.addSymbolTable(symbolTable);

    }

    @Override

    public MutableSymbolTable getSymbolTable() {

        return this.defaultSymbolTable;

    }

    @Override

    public T get() {

        String source = this.text.getText();

        try {

            ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager();

            Object value = manager.evaluate(this.defaultSymbolTable, source);

            if (this.dataType != DataTypes.OBJECT) {

                DataTypesManager dataManager = ToolsLocator.getDataTypesManager();

                value = dataManager.coerce(this.dataType, value);

            }

            return (T) value;

        } catch (CoercionException ex) {

            if (this.dataType != DataTypes.STRING) {

                return (T) source;

            }

            return null;

        }

    }

    @Override

    public void set(T value) {

        this.text.setText(Objects.toString(value, ""));

    }

    @Override

    public void coerceAndSet(Object value) {

        if (this.dataType != DataTypes.OBJECT) {

            DataTypesManager dataManager = ToolsLocator.getDataTypesManager();

            try {

                value = dataManager.coerce(this.dataType, value);

            } catch (CoercionException ex) {

            }

        }

        this.text.setText(Objects.toString(value, ""));

    }

    @Override

    public void setEnabled(boolean enabled) {

        this.text.setEnabled(enabled);

    }

    @Override

    public boolean isEnabled() {

        return this.text.isEnabled();

    }

}