An enhancement of ObjectType that supports filtering

dependencies.yml

- com.google.guava -> guava 10.0.1

FilteredObjectType.java

package controllers;

import com.google.common.base.Predicate;
import com.google.common.collect.Collections2;
import play.db.jpa.Model;

import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;

import static com.google.common.collect.Lists.newArrayList;

public class FilteredObjectType extends CRUD.ObjectType{
    private final Collection<ObjectField> filteredFields;

    public FilteredObjectType(Class<? extends Model> modelClass, String ... filteredFieldNames) {
        this(new CRUD.ObjectType(modelClass), filteredFieldNames);
    }

    public FilteredObjectType(CRUD.ObjectType objectType, final String ... filteredFieldNames) {
        super(objectType.entityClass);
        final HashSet<String> filteredFieldNamesSet = new HashSet<String>(Arrays.asList(filteredFieldNames));
        filteredFields = Collections2.filter(super.getFields(), new Predicate<ObjectField>() {
            public boolean apply(ObjectField objectField) {
                return !filteredFieldNamesSet.contains(objectField.name);
            }
        });
    }

    @Override
    public List<ObjectField> getFields() {
        // defensive copy
        return newArrayList(filteredFields);
    }
}

MyController.java

public static void show(long id) {
    MyModel object = MyModel.findById(id);
    CRUD.ObjectType type = new FilteredObjectType(MyModel.class, "filteredField1", "filteredField2");
    render(type, object);
}