fr.amapj.view.engine.popup.formpopup.validator.ValidatorHolder.java Source code

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Here is the source code for fr.amapj.view.engine.popup.formpopup.validator.ValidatorHolder.java

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/*
 *  Copyright 2013-2018 Emmanuel BRUN (contact@amapj.fr)
 * 
 *  This file is part of AmapJ.
 *  
 *  AmapJ is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
    
 *  AmapJ 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with AmapJ.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * 
 */
package fr.amapj.view.engine.popup.formpopup.validator;

import java.util.ArrayList;
import java.util.List;

import com.vaadin.data.Property.ValueChangeEvent;
import com.vaadin.data.Property.ValueChangeListener;
import com.vaadin.server.AbstractErrorMessage.ContentMode;
import com.vaadin.server.ErrorMessage.ErrorLevel;
import com.vaadin.server.UserError;
import com.vaadin.ui.AbstractField;

public class ValidatorHolder {
    protected AbstractField f;
    protected String title;
    protected Object propertyId;

    protected List<String> errorMessage = new ArrayList<>();

    private IValidator validator;

    public ValidatorHolder(IValidator validator, AbstractField f, String title, Object propertyId) {
        this.validator = validator;

        this.f = f;
        this.title = title;
        this.propertyId = propertyId;
    }

    public void addMessage(String msg) {
        errorMessage.add(msg);
    }

    /**
     * Retourne une liste vide si tout est ok, sinon retourne une liste de message d'erreur
     * @return
     */
    public List<String> validate() {
        errorMessage = new ArrayList<>();

        Object value = f.getValue();

        validator.performValidate(value, this);

        if (errorMessage.size() > 0) {
            String str = computeHtml();

            f.setComponentError(new UserError(str, ContentMode.HTML, ErrorLevel.ERROR));

            if (validator.canCheckOnFly()) {
                f.addValueChangeListener(e -> handleValueChange());
                AbstractField[] fields = validator.revalidateOnChangeOf();
                if (fields != null) {
                    for (AbstractField field : fields) {
                        field.addValueChangeListener(e -> handleValueChange());
                    }
                }
            }
        }

        return errorMessage;
    }

    private void handleValueChange() {
        errorMessage = new ArrayList<>();

        Object value = f.getValue();

        validator.performValidate(value, this);

        // Si l'erreur a disparu
        if (errorMessage.size() == 0) {
            // On efface l'erreur
            f.setComponentError(null);
        }
        // Sinon on met  jour l'erreur
        else {
            String str = computeHtml();

            f.setComponentError(new UserError(str, ContentMode.HTML, ErrorLevel.ERROR));
        }
    }

    private String computeHtml() {
        StringBuffer buf = new StringBuffer();
        for (String msg : errorMessage) {
            buf.append("<big>");
            buf.append(msg);
            buf.append("</big>");
            buf.append("<br/>");
        }

        return buf.toString();
    }

    public AbstractField getField() {
        return f;
    }

    public String getTitle() {
        return title;
    }

}