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/*
* Copyright (C) 2011 Archie L. Cobbs. All rights reserved.
*/
package org.dellroad.stuff.vaadin7;
import java.util.ArrayList;
import java.util.Collection;
/**
* An {@link AbstractSimpleContainer} with {@link Integer} item IDs.
*
*
* Use {@link #load} to (re)load the container.
*
* @param the type of the Java objects that back each {@link com.vaadin.data.Item} in the container
* @see AbstractSimpleContainer
*/
@SuppressWarnings("serial")
public class SimpleContainer extends AbstractSimpleContainer {
private ArrayList items = new ArrayList<>(0);
/**
* Constructor.
*
*
* After using this constructor, subsequent invocations of {@link #setPropertyExtractor setPropertyExtractor()}
* and {@link #setProperties setProperties()} are required to define the properties of this container
* and how to extract them.
*/
public SimpleContainer() {
}
/**
* Constructor.
*
*
* After using this constructor, a subsequent invocation of {@link #setProperties setProperties()} is required
* to define the properties of this container.
*
* @param propertyExtractor used to extract properties from the underlying Java objects;
* may be null but then container is not usable until one is configured via
* {@link #setPropertyExtractor setPropertyExtractor()}
*/
public SimpleContainer(PropertyExtractor propertyExtractor) {
this(propertyExtractor, null);
}
/**
* Constructor.
*
*
* After using this constructor, a subsequent invocation of {@link #setPropertyExtractor setPropertyExtractor()} is required
* to define how to extract the properties of this container; alternately, subclasses can override
* {@link #getPropertyValue getPropertyValue()}.
*
* @param propertyDefs container property definitions; null is treated like the empty set
*/
protected SimpleContainer(Collection> propertyDefs) {
this(null, propertyDefs);
}
/**
* Constructor.
*
* @param propertyExtractor used to extract properties from the underlying Java objects;
* may be null but then container is not usable until one is configured via
* {@link #setPropertyExtractor setPropertyExtractor()}
* @param propertyDefs container property definitions; null is treated like the empty set
*/
public SimpleContainer(PropertyExtractor propertyExtractor, Collection> propertyDefs) {
super(propertyExtractor, propertyDefs);
}
/**
* Constructor.
*
*
* Properties will be determined by the {@link ProvidesProperty @ProvidesProperty} and
* {@link ProvidesPropertySort @ProvidesPropertySort} annotated methods in the given class.
*
* @param type class to introspect for annotated methods
* @throws IllegalArgumentException if {@code type} is null
* @throws IllegalArgumentException if {@code type} has two {@link ProvidesProperty @ProvidesProperty}
* or {@link ProvidesPropertySort @ProvidesPropertySort} annotated methods for the same property
* @throws IllegalArgumentException if a {@link ProvidesProperty @ProvidesProperty}-annotated method with no
* {@linkplain ProvidesProperty#value property name specified} has a name which cannot be interpreted as a bean
* property "getter" method
* @see ProvidesProperty
* @see ProvidesPropertySort
* @see ProvidesPropertyScanner
*/
public SimpleContainer(Class type) {
super(type);
}
@Override
public T getJavaObject(Object itemId) {
if (!(itemId instanceof Integer))
return null;
int index = ((Integer)itemId).intValue();
if (index < 0 || index >= this.items.size())
return null;
return this.items.get(index);
}
@Override
protected void resetItemIds() {
this.items = new ArrayList<>();
}
@Override
protected Integer generateItemId(T obj) {
int itemId = this.items.size();
this.items.add(obj);
return itemId;
}
}