/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.isis.viewer.dnd.tree;
import java.util.List;
import org.apache.isis.applib.annotation.Where;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.spec.feature.Contributed;
import org.apache.isis.core.metamodel.spec.feature.ObjectAssociation;
import org.apache.isis.core.runtime.system.context.IsisContext;
import org.apache.isis.viewer.dnd.view.Axes;
import org.apache.isis.viewer.dnd.view.Content;
import org.apache.isis.viewer.dnd.view.SubviewDecorator;
import org.apache.isis.viewer.dnd.view.View;
import org.apache.isis.viewer.dnd.view.ViewRequirement;
import org.apache.isis.viewer.dnd.view.base.Layout;
import org.apache.isis.viewer.dnd.view.border.SelectObjectBorder;
import org.apache.isis.viewer.dnd.view.composite.ObjectFieldBuilder;
import org.apache.isis.viewer.dnd.view.composite.StackLayout;
/**
* Specification for a tree node that will display an open object as a root node
* or within an object.
*
* @see org.apache.isis.viewer.dnd.tree.ClosedObjectNodeSpecification for
* displaying a closed collection within an object.
*/
public class OpenObjectNodeSpecification extends CompositeNodeSpecification {
private final SubviewDecorator decorator = new SelectObjectBorder.Factory();
// REVIEW: should provide this rendering context, rather than hardcoding.
// the net effect currently is that class members annotated with
// @Hidden(where=Where.ANYWHERE) or @Disabled(where=Where.ANYWHERE) will indeed
// be hidden/disabled, but will be visible/enabled (perhaps incorrectly)
// for any other value for Where
private final Where where = Where.ANYWHERE;
public OpenObjectNodeSpecification() {
builder = new ObjectFieldBuilder(this);
}
@Override
public Layout createLayout(final Content content, final Axes axes) {
return new StackLayout();
}
/**
* This is only used to control root nodes. Therefore a object tree can only
* be displayed for an object with fields that are collections.
*/
@Override
public boolean canDisplay(final ViewRequirement requirement) {
if (requirement.isObject() && requirement.hasReference()) {
final ObjectAdapter object = requirement.getAdapter();
final List<ObjectAssociation> fields = object.getSpecification().getAssociations(Contributed.EXCLUDED, ObjectAssociation.Filters.dynamicallyVisible(IsisContext.getAuthenticationSession(), object, where));
for (int i = 0; i < fields.size(); i++) {
if (fields.get(i).isOneToManyAssociation()) {
return true;
}
}
}
return false;
}
@Override
protected View createNodeView(final Content content, final Axes axes) {
return decorator.decorate(axes, super.createNodeView(content, axes));
}
@Override
public int canOpen(final Content content) {
return CAN_OPEN;
}
@Override
public boolean isOpen() {
return true;
}
@Override
public boolean isSubView() {
return false;
}
@Override
public String getName() {
return "Object tree node - open";
}
}