/*
* 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.table;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.isis.applib.annotation.Where;
import org.apache.isis.core.commons.ensure.Assert;
import org.apache.isis.core.commons.exceptions.UnexpectedCallException;
import org.apache.isis.core.commons.exceptions.UnknownTypeException;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;
import org.apache.isis.core.metamodel.spec.feature.ObjectAssociation;
import org.apache.isis.core.metamodel.spec.feature.OneToManyAssociation;
import org.apache.isis.core.metamodel.spec.feature.OneToOneAssociation;
import org.apache.isis.core.progmodel.facets.value.booleans.BooleanValueFacet;
import org.apache.isis.core.progmodel.facets.value.image.ImageValueFacet;
import org.apache.isis.core.runtime.system.context.IsisContext;
import org.apache.isis.viewer.dnd.field.CheckboxField;
import org.apache.isis.viewer.dnd.view.Axes;
import org.apache.isis.viewer.dnd.view.Content;
import org.apache.isis.viewer.dnd.view.GlobalViewFactory;
import org.apache.isis.viewer.dnd.view.ObjectContent;
import org.apache.isis.viewer.dnd.view.Toolkit;
import org.apache.isis.viewer.dnd.view.View;
import org.apache.isis.viewer.dnd.view.ViewRequirement;
import org.apache.isis.viewer.dnd.view.ViewSpecification;
import org.apache.isis.viewer.dnd.view.base.BlankView;
import org.apache.isis.viewer.dnd.view.base.FieldErrorView;
import org.apache.isis.viewer.dnd.view.composite.AbstractViewBuilder;
import org.apache.isis.viewer.dnd.view.content.TextParseableContent;
import org.apache.isis.viewer.dnd.view.field.OneToOneFieldImpl;
import org.apache.isis.viewer.dnd.view.field.TextParseableFieldImpl;
import org.apache.isis.viewer.dnd.viewer.basic.UnlinedTextFieldSpecification;
class TableCellBuilder extends AbstractViewBuilder {
private static final Logger LOG = LoggerFactory.getLogger(TableCellBuilder.class);
// REVIEW: should provide this rendering context, rather than hardcoding.
// the net effect currently is that class members annotated with
// @Hidden(where=Where.ALL_TABLES) will indeed be hidden from all tables
// but will be shown (perhaps incorrectly) if annotated with Where.PARENTED_TABLE
// or Where.STANDALONE_TABLE
private final Where where = Where.ALL_TABLES;
private void addField(final View view, final Axes axes, final ObjectAdapter object, final ObjectAssociation field) {
final ObjectAdapter value = field.get(object);
View fieldView;
fieldView = createFieldView(view, axes, object, field, value);
if (fieldView != null) {
view.addView(decorateSubview(axes, fieldView));
} else {
view.addView(new FieldErrorView("No field for " + value));
}
}
@Override
public void build(final View view, final Axes axes) {
Assert.assertEquals("ensure the view is complete decorated view", view.getView(), view);
final Content content = view.getContent();
final ObjectAdapter object = ((ObjectContent) content).getObject();
if (view.getSubviews().length == 0) {
initialBuild(object, view, axes);
} else {
updateBuild(object, view, axes);
}
}
private void updateBuild(final ObjectAdapter object, final View view, final Axes axes) {
final TableAxis viewAxis = axes.getAxis(TableAxis.class);
LOG.debug("update view " + view + " for " + object);
final View[] subviews = view.getSubviews();
final ObjectSpecification spec = object.getSpecification();
for (int i = 0; i < subviews.length; i++) {
final ObjectAssociation field = fieldFromActualSpec(spec, viewAxis.getFieldForColumn(i));
final View subview = subviews[i];
final ObjectAdapter value = field.get(object);
// if the field is parseable then it may have been modified; we need
// to replace what was
// typed in with the actual title.
if (field.getSpecification().isParseable()) {
final boolean visiblityChange = !field.isVisible(IsisContext.getAuthenticationSession(), object, where).isAllowed() ^ (subview instanceof BlankView);
final ObjectAdapter adapter = subview.getContent().getAdapter();
final boolean valueChange = value != null && value.getObject() != null && !value.getObject().equals(adapter.getObject());
if (visiblityChange || valueChange) {
final View fieldView = createFieldView(view, axes, object, field, value);
view.replaceView(subview, decorateSubview(axes, fieldView));
}
subview.refresh();
} else if (field.isOneToOneAssociation()) {
final ObjectAdapter existing = ((ObjectContent) subviews[i].getContent()).getObject();
final boolean changedValue = value != existing;
if (changedValue) {
View fieldView;
fieldView = createFieldView(view, axes, object, field, value);
if (fieldView != null) {
view.replaceView(subview, decorateSubview(axes, fieldView));
} else {
view.addView(new FieldErrorView("No field for " + value));
}
}
}
}
}
private ObjectAssociation fieldFromActualSpec(final ObjectSpecification spec, final ObjectAssociation field) {
final String fieldName = field.getId();
return spec.getAssociation(fieldName);
}
private void initialBuild(final ObjectAdapter object, final View view, final Axes axes) {
final TableAxis viewAxis = axes.getAxis(TableAxis.class);
LOG.debug("build view " + view + " for " + object);
final int len = viewAxis.getColumnCount();
final ObjectSpecification spec = object.getSpecification();
for (int f = 0; f < len; f++) {
if (f > 3) {
continue;
}
final ObjectAssociation field = fieldFromActualSpec(spec, viewAxis.getFieldForColumn(f));
addField(view, axes, object, field);
}
}
private View createFieldView(final View view, final Axes axes, final ObjectAdapter object, final ObjectAssociation field, final ObjectAdapter value) {
if (field == null) {
throw new NullPointerException();
}
final GlobalViewFactory factory = Toolkit.getViewFactory();
ViewSpecification cellSpec;
Content content;
if (field instanceof OneToManyAssociation) {
throw new UnexpectedCallException("no collections allowed");
} else if (field instanceof OneToOneAssociation) {
final ObjectSpecification fieldSpecification = field.getSpecification();
if (fieldSpecification.isParseable()) {
content = new TextParseableFieldImpl(object, value, (OneToOneAssociation) field);
// REVIEW how do we deal with IMAGES?
if (content.getAdapter() instanceof ImageValueFacet) {
return new BlankView(content);
}
if (!field.isVisible(IsisContext.getAuthenticationSession(), object, where).isAllowed()) {
return new BlankView(content);
}
if (((TextParseableContent) content).getNoLines() > 0) {
/*
* TODO remove this after introducing constraints into view
* specs that allow the parent view to specify what kind of
* subviews it can deal
*/
if (fieldSpecification.containsFacet(BooleanValueFacet.class)) {
cellSpec = new CheckboxField.Specification();
} else {
cellSpec = new UnlinedTextFieldSpecification();
}
} else {
return factory.createView(new ViewRequirement(content, ViewRequirement.CLOSED));
}
} else {
content = new OneToOneFieldImpl(object, value, (OneToOneAssociation) field);
if (!field.isVisible(IsisContext.getAuthenticationSession(), object, where).isAllowed()) {
return new BlankView(content);
}
return factory.createView(new ViewRequirement(content, ViewRequirement.CLOSED | ViewRequirement.SUBVIEW));
}
} else {
throw new UnknownTypeException(field);
}
return cellSpec.createView(content, axes, -1);
}
}