org.ikasan.dashboard.ui.general.component.AbstractEntityView Maven / Gradle / Ivy

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package org.ikasan.dashboard.ui.general.component;

import com.vaadin.flow.component.Component;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import de.f0rce.ace.AceEditor;
import de.f0rce.ace.enums.AceMode;
import de.f0rce.ace.enums.AceTheme;
import org.w3c.dom.Document;
import org.xml.sax.InputSource;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.StringReader;
import java.io.StringWriter;

public abstract class AbstractEntityView extends VerticalLayout
{
    protected DocumentBuilder documentBuilder;
    protected Transformer transformer;
    protected AceEditor aceEditor;
    protected boolean initialised = false;
    protected VerticalLayout layout = new VerticalLayout();

    public abstract Component getEntityDetailsLayout();

    public abstract void populate(ENTITY entity);

    public AbstractEntityView()
    {
        this.setSizeFull();
        try
        {
            documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
            transformer = TransformerFactory.newInstance().newTransformer();
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
            transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
        }
        catch (Exception e)
        {
            throw  new IllegalStateException("Could not construct EventViewDialog!", e);
        }

        initialiseEditor();
    }

    private void init()
    {
        layout.setWidth("100%");

        layout.add(this.getEntityDetailsLayout(), aceEditor);

        this.add(layout);
    }

    public void open(String event)
    {
        if(!initialised)
        {
            init();
            initialised = true;
        }

        String xmlString = formatXml(event);
        aceEditor.setValue(xmlString);
    }

    protected String formatXml(String event)
    {
        String xmlString;
        try
        {
            Document doc = this.documentBuilder
                .parse(new InputSource(new StringReader(event)));

            StreamResult result = new StreamResult(new StringWriter());
            DOMSource source = new DOMSource(doc);
            transformer.transform(source, result);
            xmlString = result.getWriter().toString();
        }
        catch (Exception e)
        {
            xmlString = event;
        }

        return xmlString;
    }

    protected void initialiseEditor()
    {
        aceEditor = new AceEditor();

        aceEditor.setTheme(AceTheme.dracula);
        aceEditor.setMode(AceMode.xml);
        aceEditor.setFontSize(11);
        aceEditor.setTabSize(4);
        aceEditor.setWidth("100%");
        aceEditor.setHeight("500px");
        aceEditor.setReadOnly(true);
    }
}