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package com.sun.faces.facelets.tag.jsf.core;
import com.sun.faces.facelets.el.LegacyValueBinding;
import com.sun.faces.facelets.tag.TagHandlerImpl;
import com.sun.faces.facelets.tag.jsf.CompositeComponentTagHandler;
import javax.el.ELContext;
import javax.el.ExpressionFactory;
import javax.el.ValueExpression;
import javax.faces.component.ActionSource;
import javax.faces.component.ActionSource2;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.ActionEvent;
import javax.faces.event.ActionListener;
import javax.faces.view.facelets.*;
import java.io.IOException;
import java.io.Serializable;
import javax.faces.application.Resource;
import javax.faces.view.ActionSource2AttachedObjectHandler;
public class SetPropertyActionListenerHandler extends TagHandlerImpl implements ActionSource2AttachedObjectHandler {
private final TagAttribute value;
private final TagAttribute target;
public SetPropertyActionListenerHandler(TagConfig config) {
super(config);
this.value = this.getRequiredAttribute("value");
this.target = this.getRequiredAttribute("target");
}
public void apply(FaceletContext ctx, UIComponent parent)
throws IOException {
if (null == parent || !(ComponentHandler.isNew(parent))) {
return;
}
if (parent instanceof ActionSource) {
applyAttachedObject(ctx.getFacesContext(), parent);
} else if (UIComponent.isCompositeComponent(parent)) {
if (null == getFor()) {
// PENDING(): I18N
throw new TagException(this.tag,
"actionListener tags nested within composite components must have a non-null \"for\" attribute");
}
// Allow the composite component to know about the target
// component.
CompositeComponentTagHandler.getAttachedObjectHandlers(parent)
.add(this);
} else {
throw new TagException(this.tag,
"Parent is not of type ActionSource, type is: "
+ parent);
}
}
public void applyAttachedObject(FacesContext context, UIComponent parent) {
FaceletContext ctx = (FaceletContext) context.getAttributes()
.get(FaceletContext.FACELET_CONTEXT_KEY);
ActionSource src = (ActionSource) parent;
ValueExpression valueExpr = this.value.getValueExpression(ctx,
Object.class);
ValueExpression targetExpr = this.target.getValueExpression(
ctx, Object.class);
ActionListener listener;
if (src instanceof ActionSource2) {
listener = new SetPropertyListener(valueExpr, targetExpr);
} else {
listener = new LegacySetPropertyListener(
new LegacyValueBinding(valueExpr),
new LegacyValueBinding(targetExpr));
}
src.addActionListener(listener);
}
public String getFor() {
String result = null;
TagAttribute attr = this.getAttribute("for");
if (null != attr) {
result = attr.getValue();
}
return result;
}
private static class LegacySetPropertyListener implements ActionListener,
Serializable {
private ValueBinding value;
private ValueBinding target;
public LegacySetPropertyListener() {
};
public LegacySetPropertyListener(ValueBinding value, ValueBinding target) {
this.value = value;
this.target = target;
}
public void processAction(ActionEvent evt)
throws AbortProcessingException {
FacesContext faces = FacesContext.getCurrentInstance();
Object valueObj = this.value.getValue(faces);
this.target.setValue(faces, valueObj);
}
}
private static class SetPropertyListener implements ActionListener,
Serializable {
private ValueExpression value;
private ValueExpression target;
public SetPropertyListener() {
};
public SetPropertyListener(ValueExpression value, ValueExpression target) {
this.value = value;
this.target = target;
}
public void processAction(ActionEvent evt)
throws AbortProcessingException {
FacesContext faces = FacesContext.getCurrentInstance();
ELContext el = faces.getELContext();
Object valueObj = this.value.getValue(el);
if (valueObj != null) {
ExpressionFactory factory =
faces.getApplication().getExpressionFactory();
valueObj = factory.coerceToType(valueObj, target.getType(el));
}
this.target.setValue(el, valueObj);
}
}
}