org.primefaces.component.collector.Collector Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of primefaces Show documentation
Show all versions of primefaces Show documentation
PrimeFaces is one of the most popular UI libraries in Java EE Ecosystem and widely used by software companies, world renowned brands, banks, financial institutions, insurance companies, universities and more.
/**
* Copyright 2009-2018 PrimeTek.
*
* Licensed 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.primefaces.component.collector;
import java.util.Collection;
import javax.el.ELContext;
import javax.el.ValueExpression;
import javax.faces.component.StateHolder;
import javax.faces.context.FacesContext;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.ActionEvent;
import javax.faces.event.ActionListener;
public class Collector implements ActionListener, StateHolder {
private ValueExpression addTo;
private ValueExpression removeFrom;
private ValueExpression value;
private ValueExpression unique;
private boolean _transient;
public Collector() {
}
public Collector(ValueExpression addTo, ValueExpression removeFrom, ValueExpression value, ValueExpression unique) {
this.addTo = addTo;
this.removeFrom = removeFrom;
this.value = value;
this.unique = unique;
}
@Override
public void processAction(ActionEvent actionEvent) throws AbortProcessingException {
if (value == null) {
throw new AbortProcessingException("Value has not been set");
}
ELContext elContext = FacesContext.getCurrentInstance().getELContext();
Object val = (Object) value.getValue(elContext);
if (addTo != null) {
Collection collection = (Collection) addTo.getValue(elContext);
Object uniqueValue = (unique != null) ? unique.getValue(elContext) : null;
boolean checkUniqueness = (uniqueValue == null) ? true : (Boolean.valueOf(uniqueValue.toString())).booleanValue();
if (checkUniqueness) {
if (!collection.contains(val)) {
collection.add(val);
}
}
else {
collection.add(val);
}
}
else if (removeFrom != null) {
Collection collection = (Collection) removeFrom.getValue(elContext);
collection.remove(val);
}
else {
throw new IllegalArgumentException("Specify either addTo or removeFrom as collection reference");
}
}
@Override
public Object saveState(FacesContext context) {
Object[] state = new Object[4];
state[0] = addTo;
state[1] = removeFrom;
state[2] = value;
state[3] = unique;
return state;
}
@Override
public void restoreState(FacesContext context, Object state) {
Object[] values = (Object[]) state;
addTo = (ValueExpression) values[0];
removeFrom = (ValueExpression) values[1];
value = (ValueExpression) values[2];
unique = (ValueExpression) values[3];
}
@Override
public boolean isTransient() {
return _transient;
}
@Override
public void setTransient(boolean _transient) {
this._transient = _transient;
}
public ValueExpression getAddTo() {
return addTo;
}
public void setAddTo(ValueExpression addTo) {
this.addTo = addTo;
}
public ValueExpression getRemoveFrom() {
return removeFrom;
}
public void setRemoveFrom(ValueExpression removeFrom) {
this.removeFrom = removeFrom;
}
public ValueExpression getValue() {
return value;
}
public void setValue(ValueExpression value) {
this.value = value;
}
public ValueExpression getUnique() {
return unique;
}
public void setUnique(ValueExpression unique) {
this.unique = unique;
}
}