ca.sqlpower.matchmaker.swingui.munge.NumberConstantMungeComponent.java Source code

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Here is the source code for ca.sqlpower.matchmaker.swingui.munge.NumberConstantMungeComponent.java

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/*
 * Copyright (c) 2008, SQL Power Group Inc.
 *
 * This file is part of DQguru
 *
 * DQguru is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * DQguru is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
 */

package ca.sqlpower.matchmaker.swingui.munge;

import java.awt.event.ActionEvent;
import java.math.BigDecimal;

import javax.swing.AbstractAction;
import javax.swing.JCheckBox;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;

import ca.sqlpower.matchmaker.MatchMakerSession;
import ca.sqlpower.matchmaker.munge.MungeStep;
import ca.sqlpower.matchmaker.munge.NumberConstantMungeStep;
import ca.sqlpower.validation.Status;
import ca.sqlpower.validation.ValidateResult;
import ca.sqlpower.validation.Validator;
import ca.sqlpower.validation.swingui.FormValidationHandler;

import com.jgoodies.forms.builder.DefaultFormBuilder;
import com.jgoodies.forms.layout.FormLayout;

public class NumberConstantMungeComponent extends AbstractMungeComponent {
    private JTextField valueField;
    private JCheckBox retNull;

    public NumberConstantMungeComponent(MungeStep step, FormValidationHandler handler, MatchMakerSession session) {
        super(step, handler, session);
        getHandler().addValidateObject(valueField, new NumberValidator());
        getHandler().resetHasValidated();
    }

    @Override
    protected JPanel buildUI() {
        final NumberConstantMungeStep step = (NumberConstantMungeStep) getStep();
        valueField = new JTextField(step.getValue() == null ? "" : step.getValue().toString());

        valueField.getDocument().addDocumentListener(new DocumentListener() {
            void change() {
                step.setValue(new BigDecimal(valueField.getText()));
            }

            public void changedUpdate(DocumentEvent e) {
                change();
            }

            public void insertUpdate(DocumentEvent e) {
                change();
            }

            public void removeUpdate(DocumentEvent e) {
                change();
            }
        });

        retNull = new JCheckBox("Return null");
        retNull.addActionListener(new AbstractAction() {
            public void actionPerformed(ActionEvent e) {
                boolean b = retNull.isSelected();
                valueField.setEnabled(!b);
                if (b) {
                    step.setValue(null);
                }
            }
        });

        retNull.setSelected(step.getValue() == null);
        valueField.setEnabled(!retNull.isSelected());

        FormLayout layout = new FormLayout("pref,4dlu,pref:grow");
        DefaultFormBuilder fb = new DefaultFormBuilder(layout);
        fb.append("Value:", valueField);
        fb.append("", retNull);

        return fb.getPanel();
    }

    private class NumberValidator implements Validator {
        public ValidateResult validate(Object contents) {
            if (retNull.isSelected()) {
                return ValidateResult.createValidateResult(Status.OK, "");
            }
            try {
                new BigDecimal(valueField.getText());
                return ValidateResult.createValidateResult(Status.OK, "");
            } catch (NumberFormatException e) {
                return ValidateResult.createValidateResult(Status.FAIL,
                        valueField.getText() + " is an invalid number");
            }
        }
    }
}