/*
* (C) Copyright 2014 Nuxeo SA (http://nuxeo.com/) and others.
*
* 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.
*
* Contributors:
* Anahide Tchertchian
*/
package org.nuxeo.ecm.platform.ui.web.component;
import javax.faces.model.SelectItem;
/**
* Helper for select items management
*
* @since 6.0
*/
public abstract class SelectItemFactory {
protected abstract String getVar();
protected abstract SelectItem createSelectItem();
public SelectItem createSelectItem(Object value) {
SelectItem item = null;
Object varValue = saveRequestMapVarValue();
try {
putIteratorToRequestParam(value);
item = createSelectItem();
removeIteratorFromRequestParam();
} finally {
restoreRequestMapVarValue(varValue);
}
return item;
}
protected void putIteratorToRequestParam(Object object) {
String var = getVar();
VariableManager.putVariableToRequestParam(var, object);
}
protected void removeIteratorFromRequestParam() {
String var = getVar();
VariableManager.removeVariableFromRequestParam(var);
}
/**
* Returns the value exposed in request map for the var name.
* <p>
* This is useful for restoring this value in the request map.
*
* @since 5.4.2
*/
protected final Object saveRequestMapVarValue() {
String varName = getVar();
return VariableManager.saveRequestMapVarValue(varName);
}
/**
* Restores the given value in the request map for the var name.
*
* @since 5.4.2
*/
protected final void restoreRequestMapVarValue(Object value) {
VariableManager.restoreRequestMapVarValue(getVar(), value);
}
}