io.github.mmm.ui.api.binding.data.UiBindingReceiverImpl Maven / Gradle / Ivy
/* Copyright (c) The m-m-m Team, Licensed under the Apache License, Version 2.0
* http://www.apache.org/licenses/LICENSE-2.0 */
package io.github.mmm.ui.api.binding.data;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import io.github.mmm.bean.ReadableBean;
import io.github.mmm.bean.WritableBean;
import io.github.mmm.property.ReadableProperty;
import io.github.mmm.ui.api.binding.UiValueBinding;
import io.github.mmm.ui.api.widget.input.UiAbstractInput;
import io.github.mmm.ui.api.widget.value.UiBindableWidget;
/**
* Implementation of {@link UiBindingReceiver}.
*
* @param type of {@link WritableBean}.
* @since 1.0.0
*/
public class UiBindingReceiverImpl implements UiBindingReceiver, UiValueBinding {
private final B bean;
private final Map> propertyName2InputMap;
private UiBindableWidget widget;
private B value;
private long modificationTimestamp;
/**
* The constructor.
*
* @param bean the {@link WritableBean} to use as template for the binding.
*/
public UiBindingReceiverImpl(B bean) {
super();
this.bean = bean;
this.propertyName2InputMap = new HashMap<>();
this.modificationTimestamp = -1;
}
@Override
public void setWidget(UiBindableWidget widget) {
assert (this.widget == null);
this.widget = widget;
}
@Override
public B getValue() {
long ts = -1;
if (this.widget != null) {
ts = this.widget.getModificationTimestamp();
if (ts < this.modificationTimestamp) {
return this.value;
}
}
B result = ReadableBean.newInstance(this.bean);
for (Map.Entry> entry : this.propertyName2InputMap.entrySet()) {
String propertyName = entry.getKey();
UiAbstractInput input = entry.getValue();
result.set(propertyName, input.getValue());
}
this.value = result;
this.modificationTimestamp = ts;
System.out.println("Created new value " + result);
return result;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
@Override
public void setValue(B newBean, boolean forUser) {
for (Map.Entry> entry : this.propertyName2InputMap.entrySet()) {
String propertyName = entry.getKey();
Object propertyValue = null;
if (newBean != null) {
propertyValue = newBean.get(propertyName);
}
UiAbstractInput input = entry.getValue();
input.setValue(propertyValue, forUser);
}
this.value = newBean;
updateModificationTimestamp(!forUser);
}
private void updateModificationTimestamp(boolean reset) {
if (reset) {
this.modificationTimestamp = -1;
} else {
this.modificationTimestamp = System.currentTimeMillis();
}
}
@Override
public void add(ReadableProperty property, UiAbstractInput input) {
this.propertyName2InputMap.put(property.getName(), input);
}
/**
* @return the {@link Collection} of the {@link UiAbstractInput}s.
*/
public Collection> getInputs() {
return this.propertyName2InputMap.values();
}
}