DefaultCustomObjectEditor.java

/***************************************************
*
* cismet GmbH, Saarbruecken, Germany
*
*              ... and it just works.
*
****************************************************/
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/*
 * DefaultCustomObjectEditor.java
 *
 * Created on 11.03.2009, 16:56:02
 */
package de.cismet.cids.editors;

import Sirius.server.localserver.attribute.ObjectAttribute;
import Sirius.server.middleware.types.MetaClass;
import Sirius.server.middleware.types.MetaClassStore;

import org.jdesktop.beansbinding.Binding;
import org.jdesktop.beansbinding.BindingGroup;
import org.jdesktop.beansbinding.ELProperty;
import org.jdesktop.el.impl.ValueExpressionImpl;

import java.lang.reflect.Field;

import java.util.List;

import de.cismet.cids.dynamics.CidsBean;
import de.cismet.cids.dynamics.DisposableCidsBeanStore;

/**
 * DOCUMENT ME!
 *
 * @author   thorsten
 * @version  $Revision$, $Date$
 */
public class DefaultCustomObjectEditor extends javax.swing.JPanel implements DisposableCidsBeanStore {

    //~ Static fields/initializers ---------------------------------------------

    private static final org.apache.log4j.Logger log = org.apache.log4j.Logger.getLogger(
            DefaultCustomObjectEditor.class);

    //~ Instance fields --------------------------------------------------------

    protected CidsBean cidsBean;

    //~ Constructors -----------------------------------------------------------

    /**
     * Creates new form DefaultCustomObjectEditor.
     */
    public DefaultCustomObjectEditor() {
        initComponents();
    }

    //~ Methods ----------------------------------------------------------------

    /**
     * This method is called from within the constructor to initialize the form. WARNING: Do NOT modify this code. The
     * content of this method is always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {
        final javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGap(0, 400, Short.MAX_VALUE));
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGap(0, 300, Short.MAX_VALUE));
    } // </editor-fold>//GEN-END:initComponents

    @Override
    public CidsBean getCidsBean() {
        return cidsBean;
    }

    @Override
    public synchronized void setCidsBean(final CidsBean cidsBean) {
        this.cidsBean = cidsBean;
        try {
            final BindingGroup bindingGroup = getBindingGroupFormChildClass();
            setMetaClassInformationToMetaClassStoreComponentsInBindingGroup(bindingGroup, cidsBean);

            bindingGroup.unbind();
            bindingGroup.bind();
            boundAndReadyNotify();
        } catch (Exception e) {
            throw new RuntimeException("Bindingproblems occur", e); // NOI18N
        }
    }

    /**
     * DOCUMENT ME!
     *
     * @return  DOCUMENT ME!
     *
     * @throws  NoSuchFieldException      DOCUMENT ME!
     * @throws  IllegalArgumentException  DOCUMENT ME!
     * @throws  IllegalAccessException    DOCUMENT ME!
     */
    private BindingGroup getBindingGroupFormChildClass() throws NoSuchFieldException,
        IllegalArgumentException,
        IllegalAccessException {
        BindingGroup bindingGroup = null;
        if (this instanceof BindingGroupStore) {
            bindingGroup = ((BindingGroupStore)this).getBindingGroup();
        } else {
            final Field bindingGroupField = getClass().getDeclaredField("bindingGroup"); // NOI18N

            bindingGroupField.setAccessible(true);

            bindingGroup = (BindingGroup)bindingGroupField.get(this);
        }
        return bindingGroup;
    }

    /**
     * DOCUMENT ME!
     *
     * @param  bindingGroup  DOCUMENT ME!
     * @param  cidsBean      DOCUMENT ME!
     */
    public static void setMetaClassInformationToMetaClassStoreComponentsInBindingGroup(final BindingGroup bindingGroup,
            final CidsBean cidsBean) {
        final List<Binding> bindings = bindingGroup.getBindings();
        for (final Binding binding : bindings) {
            if (binding.getTargetObject() instanceof MetaClassStore) {
                // log.fatal("MetaClassStores gefunden");
                String fieldname = null;
                try {
                    final MetaClassStore mcs = (MetaClassStore)binding.getTargetObject();
                    final ELProperty p = (ELProperty)binding.getSourceProperty();
                    String expr = getPropertyStringOutOfELProperty(p);
                    expr = expr.substring(expr.indexOf(".") + 1); // NOI18N
                    expr = expr.substring(0, expr.length() - 1);

                    // in expr steckt in den allermeisten faellen ein feldname
                    // es kann aber auch sein, dass ein zusammengesetzter feldname vorkommt: subobject.fieldname

                    fieldname = expr;

                    final ObjectAttribute oa = cidsBean.getMetaObject().getAttributeByFieldName(fieldname);
                    final String domain = cidsBean.getMetaObject().getDomain();
                    final int foreignClassId = oa.getMai().getForeignKeyClassId();

                    final MetaClass foreignClass = CidsObjectEditorFactory.getMetaClass(domain, foreignClassId);
                    mcs.setMetaClass(foreignClass);
                } catch (Exception e) {
                    log.error("Error during Bind: " + fieldname + " of " + cidsBean.getMetaObject().getMetaClass(), e);
                }
            }
        }
    }

    /**
     * DOCUMENT ME!
     *
     * @param   p  DOCUMENT ME!
     *
     * @return  DOCUMENT ME!
     *
     * @throws  Exception  DOCUMENT ME!
     */
    private static String getPropertyStringOutOfELProperty(final ELProperty p) throws Exception {
        final Field expressionField = p.getClass().getDeclaredField("expression"); // NOI18N
        expressionField.setAccessible(true);

        final ValueExpressionImpl valueExpression = (ValueExpressionImpl)expressionField.get(p);
        return valueExpression.getExpressionString();
    }

    /**
     * DOCUMENT ME!
     */
    public void boundAndReadyNotify() {
    }

    @Override
    public void dispose() {
        try {
            final BindingGroup bindingGroup = getBindingGroupFormChildClass();
            bindingGroup.unbind();
        } catch (Exception ex) {
            throw new RuntimeException("Binding Problem!", ex); // NOI18N
        }
    }
    // Variables declaration - do not modify//GEN-BEGIN:variables
    // End of variables declaration//GEN-END:variables
}