de.iwes.widgets.pattern.widget.init.PatternInitMultiEmpty Maven / Gradle / Ivy
/**
* Copyright 2014-2018 Fraunhofer-Gesellschaft zur Förderung der angewandten Wissenschaften e.V.
*
* 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 de.iwes.widgets.pattern.widget.init;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import org.ogema.core.application.ApplicationManager;
import org.ogema.core.model.Resource;
import org.ogema.core.resourcemanager.pattern.ResourcePattern;
import de.iwes.widgets.api.extended.pattern.PatternMultiSelector;
import de.iwes.widgets.api.extended.plus.InitWidget;
import de.iwes.widgets.api.widgets.OgemaWidget;
import de.iwes.widgets.api.widgets.WidgetPage;
import de.iwes.widgets.api.widgets.sessionmanagement.OgemaHttpRequest;
import de.iwes.widgets.html.emptywidget.EmptyData;
import de.iwes.widgets.html.emptywidget.EmptyWidget;
import de.iwes.widgets.resource.widget.init.InitUtil;
/**
* A widget that does not provide any Html, but can extract parameters from the page URL, and select corresponding patterns
* of the specified type. This can then be used to initialize other widgets on the page.
*
* @param
* @param
*/
public class PatternInitMultiEmpty, R extends Resource> extends EmptyWidget implements InitWidget, PatternMultiSelector
{
private static final long serialVersionUID = 1L;
private final ApplicationManager am;
private List
defaultSelected = null;
private final Class
type;
private final boolean allowIncompletePattern;
public PatternInitMultiEmpty(WidgetPage page, String id,boolean allowIncompletePattern, Class
type, ApplicationManager am) {
this(page, id, false, allowIncompletePattern,type, am);
}
public PatternInitMultiEmpty(WidgetPage page, String id, boolean globalWidget,boolean allowIncompletePattern, Class
type, ApplicationManager am) {
super(page, id, globalWidget);
Objects.requireNonNull(am);
this.am=am;
this.type = type;
this.allowIncompletePattern = allowIncompletePattern;
}
public PatternInitMultiEmpty(OgemaWidget parent, String id, OgemaHttpRequest req,boolean allowIncompletePattern, Class
type, ApplicationManager am) {
super(parent,id, req);
Objects.requireNonNull(am);
this.am =am;
this.type = type;
this.allowIncompletePattern= allowIncompletePattern;
}
public class PatternInitMultiEmptyOptions extends EmptyData {
private List
selectedPatterns;
public PatternInitMultiEmptyOptions(PatternInitMultiEmpty empty) {
super(empty);
}
public List getSelectedItems() {
readLock();
try {
return new ArrayList<>(selectedPatterns);
} finally {
readUnlock();
}
}
public void selectItems(Collection
items) {
if (items == null)
items = Collections.emptyList();
writeLock();
try {
this.selectedPatterns = new ArrayList<>(items);
} finally {
writeUnlock();
}
}
}
@Override
public PatternInitMultiEmptyOptions createNewSession() {
return new PatternInitMultiEmptyOptions(this);
}
@SuppressWarnings("unchecked")
@Override
public PatternInitMultiEmptyOptions getData(OgemaHttpRequest req) {
return (PatternInitMultiEmptyOptions) super.getData(req);
}
@Override
protected void setDefaultValues(EmptyData opt) {
super.setDefaultValues(opt);
@SuppressWarnings("unchecked")
PatternInitMultiEmptyOptions opt2= (PatternInitMultiEmptyOptions) opt;
opt2.selectItems(defaultSelected);
}
@Override
public void selectItems(Collection
items, OgemaHttpRequest req) {
getData(req).selectItems(items);
}
@Override
public void selectDefaultItems(Collection
items) {
this.defaultSelected = new ArrayList<>(items);
}
@Override
public List
getSelectedItems(OgemaHttpRequest req) {
return getData(req).getSelectedItems();
}
// select the pattern
@Override
public void init(OgemaHttpRequest req) {
String[] patterns = InitUtil.getInitParameters(getPage(), req);
if (patterns == null || patterns.length == 0)
return;
final List resources = new ArrayList<>();
for (String pt: patterns) {
R aux;
try {
aux = am.getResourceAccess().getResource(pt); // may return null or throw an exception
} catch (Exception e) { // if the type does not match
am.getLogger().info("Empty pattern widget could not be initialized with the selected value {}",pt,e);
aux = null;
}
if (aux == null || (!allowIncompletePattern && !aux.isActive()) || !aux.exists())
continue;
resources.add(aux);
}
List patternList = AccessController.doPrivileged(new PrivilegedAction>() {
@Override
public List run() {
List
result = new ArrayList<>();
for (R res: resources) {
try {
P pattern = type.getConstructor(Resource.class).newInstance(res);
if (!allowIncompletePattern) {
boolean satisfied = am.getResourcePatternAccess().isSatisfied(pattern, type);
if (!satisfied) {
am.getLogger().info("Found an incomplete pattern in page initialization - ignoring this: {}",pattern);
continue;
}
}
result.add(pattern);
} catch (Exception e) {
am.getLogger().warn("Could not initalize page with pattern type {} for resource {}",type.getName(),res,e);
}
}
return result;
}
});
if (patternList == null || patternList.isEmpty())
return;
am.getLogger().debug("Initializing empty pattern widget with patterns {}",patternList);
getData(req).selectItems(patternList);
}
}