eu.cedarsoft.utils.springrcp.form.FormManager Maven / Gradle / Ivy

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package com.cedarsoft.utils.springrcp.form;

import org.jetbrains.annotations.NotNull;
import org.springframework.beans.BeanUtils;
import org.springframework.binding.form.ValidatingFormModel;
import org.springframework.richclient.application.Application;
import org.springframework.richclient.form.Form;
import org.springframework.richclient.form.FormModelHelper;

import java.util.HashMap;
import java.util.Map;

/**
 * Manages the forms
 */
public class FormManager {
  @NotNull
  public static FormManager getInstance() {
    return ( FormManager ) Application.instance().getApplicationContext().getBean( "formManager" );
  }

  private Map, Class> forms = new HashMap, Class>();

  public void setForms( Map, Class> forms ) throws ClassNotFoundException {
    for ( Map.Entry, Class> entry : forms.entrySet() ) {
      Class value = ( Class ) entry.getValue();
      this.forms.put( entry.getKey(), value );
    }
  }

  @NotNull
  public Form createForm( @NotNull Object bean ) {
    ValidatingFormModel formModel = FormModelHelper.createFormModel( bean );

    Class formClass = getFormClass( bean.getClass() );
    try {
      return ( Form ) BeanUtils.instantiateClass( formClass.getDeclaredConstructor( ValidatingFormModel.class ), new Object[]{formModel} );
    } catch ( NoSuchMethodException e ) {
      throw new RuntimeException( e );
    }
  }

  @NotNull
  private Class getFormClass( @NotNull Class beanClass ) {
    Class formClass = forms.get( beanClass );
    if ( formClass == null ) {
      throw new IllegalArgumentException( "No form registered for " + beanClass );
    }
    return formClass;
  }
}