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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing,
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* KIND, either express or implied. See the License for the
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package org.apache.cayenne.modeler.editor;
import java.awt.Component;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Map;
import java.util.StringTokenizer;
import java.util.TreeMap;
import javax.swing.DefaultComboBoxModel;
import javax.swing.DefaultListCellRenderer;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JTextField;
import org.apache.cayenne.map.event.QueryEvent;
import org.apache.cayenne.modeler.ProjectController;
import org.apache.cayenne.modeler.util.CayenneWidgetFactory;
import org.apache.cayenne.modeler.util.TextAdapter;
import org.apache.cayenne.query.Query;
import org.apache.cayenne.query.QueryCacheStrategy;
import org.apache.cayenne.reflect.PropertyUtils;
import org.apache.cayenne.util.Util;
import org.apache.cayenne.validation.ValidationException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* A panel that supports editing the properties of a GenericSelectQuery.
*
*/
public abstract class SelectPropertiesPanel extends JPanel {
private static Log logObj = LogFactory.getLog(SelectPropertiesPanel.class);
private static final Integer ZERO = new Integer(0);
private static final String NO_CACHE_LABEL = "No Result Caching";
private static final String LOCAL_CACHE_LABEL = "Local Cache (per ObjectContext)";
private static final String SHARED_CACHE_LABEL = "Shared Cache";
protected static final Object[] CACHE_POLICIES = new Object[] {
QueryCacheStrategy.NO_CACHE, QueryCacheStrategy.LOCAL_CACHE,
QueryCacheStrategy.SHARED_CACHE
};
private static final Map<QueryCacheStrategy, String> cachePolicyLabels = new TreeMap<QueryCacheStrategy, String>();
static {
cachePolicyLabels.put(QueryCacheStrategy.NO_CACHE, NO_CACHE_LABEL);
cachePolicyLabels.put(QueryCacheStrategy.LOCAL_CACHE, LOCAL_CACHE_LABEL);
cachePolicyLabels.put(QueryCacheStrategy.SHARED_CACHE, SHARED_CACHE_LABEL);
}
protected TextAdapter fetchOffset;
protected TextAdapter fetchLimit;
protected TextAdapter pageSize;
protected JComboBox cacheStrategy;
protected TextAdapter cacheGroups;
protected JComponent cacheGroupsLabel;
protected ProjectController mediator;
public SelectPropertiesPanel(ProjectController mediator) {
this.mediator = mediator;
initView();
initController();
}
protected void initView() {
fetchOffset = new TextAdapter(new JTextField(7)) {
protected void updateModel(String text) {
setFetchOffset(text);
}
};
fetchLimit = new TextAdapter(new JTextField(7)) {
protected void updateModel(String text) {
setFetchLimit(text);
}
};
pageSize = new TextAdapter(new JTextField(7)) {
protected void updateModel(String text) {
setPageSize(text);
}
};
cacheStrategy = CayenneWidgetFactory.createUndoableComboBox();
cacheStrategy.setRenderer(new CacheStrategyRenderer());
cacheGroups = new TextAdapter(new JTextField()) {
protected void updateModel(String text) {
setCacheGroups(text);
}
};
}
protected void initController() {
cacheStrategy.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
QueryCacheStrategy strategy = (QueryCacheStrategy) cacheStrategy
.getModel()
.getSelectedItem();
setQueryProperty("cacheStrategy", strategy);
setCacheGroupsEnabled(strategy != null
&& strategy != QueryCacheStrategy.NO_CACHE);
}
});
}
/**
* Updates the view from the current model state. Invoked when a currently displayed
* query is changed.
*/
public void initFromModel(Query query) {
DefaultComboBoxModel cacheModel = new DefaultComboBoxModel(CACHE_POLICIES);
// TODO (andrey, 15/12/09)
//do not use metadata, as it triggers CDO class loading (CAY-1334)
//to avoid this evil hack, we need some common interface for SelectQuery, EJBQL
// & SQLTemplate, but 3.0 API is frozen now
QueryCacheStrategy selectedStrategy = (QueryCacheStrategy)
PropertyUtils.getProperty(query, "cacheStrategy");
cacheModel.setSelectedItem(selectedStrategy != null
? selectedStrategy
: QueryCacheStrategy.getDefaultStrategy());
cacheStrategy.setModel(cacheModel);
String[] cacheGroupsArray = (String[]) PropertyUtils.getProperty(query, "cacheGroups");
cacheGroups.setText(toCacheGroupsString(cacheGroupsArray));
setCacheGroupsEnabled(selectedStrategy != null
&& selectedStrategy != QueryCacheStrategy.NO_CACHE);
fetchOffset.setText(String.valueOf(PropertyUtils.getProperty(query, "fetchOffset")));
fetchLimit.setText(String.valueOf(PropertyUtils.getProperty(query, "fetchLimit")));
pageSize.setText(String.valueOf(PropertyUtils.getProperty(query, "pageSize")));
}
protected String toCacheGroupsString(String[] groups) {
StringBuilder buffer = new StringBuilder();
if (groups != null && groups.length > 0) {
for (int i = 0; i < groups.length; i++) {
if (i > 0) {
buffer.append(", ");
}
buffer.append(groups[i]);
}
}
return buffer.toString();
}
void setFetchOffset(String string) {
string = (string == null) ? "" : string.trim();
if (string.length() == 0) {
setQueryProperty("fetchOffset", ZERO);
}
else {
try {
setQueryProperty("fetchOffset", new Integer(string));
}
catch (NumberFormatException nfex) {
throw new ValidationException("Fetch offset must be an integer: "
+ string);
}
}
}
void setFetchLimit(String string) {
string = (string == null) ? "" : string.trim();
if (string.length() == 0) {
setQueryProperty("fetchLimit", ZERO);
}
else {
try {
setQueryProperty("fetchLimit", new Integer(string));
}
catch (NumberFormatException nfex) {
throw new ValidationException("Fetch limit must be an integer: " + string);
}
}
}
void setPageSize(String string) {
string = (string == null) ? "" : string.trim();
if (string.length() == 0) {
setQueryProperty("pageSize", ZERO);
}
else {
try {
setQueryProperty("pageSize", new Integer(string));
}
catch (NumberFormatException nfex) {
throw new ValidationException("Page size must be an integer: " + string);
}
}
}
void setCacheGroups(String string) {
string = (string == null) ? "" : string.trim();
StringTokenizer toks = new StringTokenizer(string, ", \t");
String[] cacheGroups = new String[toks.countTokens()];
for (int i = 0; i < cacheGroups.length; i++) {
cacheGroups[i] = toks.nextToken();
}
setQueryProperty("cacheGroups", cacheGroups);
}
Query getQuery() {
return mediator.getCurrentQuery();
}
public void setEnabled(boolean flag) {
super.setEnabled(flag);
// propagate to children
Container mainPanel = (Container) getComponent(0);
Component[] children = mainPanel.getComponents();
for (Component child : children) {
child.setEnabled(flag);
}
}
protected void setCacheGroupsEnabled(boolean enabled) {
cacheGroups.getComponent().setEnabled(enabled);
cacheGroupsLabel.setEnabled(enabled);
}
void setQueryProperty(String property, Object value) {
Query query = getQuery();
if (query != null) {
try {
Object old = PropertyUtils.getProperty(query, property);
if (Util.nullSafeEquals(value, old)) {
return;
}
PropertyUtils.setProperty(query, property, value);
mediator.fireQueryEvent(new QueryEvent(this, query));
}
catch (Exception ex) {
logObj.warn("Error setting property: " + property, ex);
}
}
}
final class CacheStrategyRenderer extends DefaultListCellRenderer {
public Component getListCellRendererComponent(
JList list,
Object object,
int arg2,
boolean arg3,
boolean arg4) {
if (object != null) {
object = cachePolicyLabels.get(object);
}
if (object == null) {
object = NO_CACHE_LABEL;
}
return super.getListCellRendererComponent(list, object, arg2, arg3, arg4);
}
}
}