/
DatabaseTableSelectionStep.java
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/
DatabaseTableSelectionStep.java
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/**
* Copyright 2016 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Eclipse Public License version 1.0, available at
* http://www.eclipse.org/legal/epl-v10.html
*/
package org.jboss.forge.addon.database.tools.generate;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Properties;
import java.util.Set;
import java.util.TreeSet;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import org.jboss.forge.addon.database.tools.util.JDBCUtils;
import org.jboss.forge.addon.parser.java.facets.JavaSourceFacet;
import org.jboss.forge.addon.projects.ProjectFactory;
import org.jboss.forge.addon.projects.ui.AbstractProjectCommand;
import org.jboss.forge.addon.ui.context.UIBuilder;
import org.jboss.forge.addon.ui.context.UIContext;
import org.jboss.forge.addon.ui.context.UIExecutionContext;
import org.jboss.forge.addon.ui.context.UIValidationContext;
import org.jboss.forge.addon.ui.input.InputComponentFactory;
import org.jboss.forge.addon.ui.input.UISelectMany;
import org.jboss.forge.addon.ui.input.UISelectOne;
import org.jboss.forge.addon.ui.input.events.ValueChangeEvent;
import org.jboss.forge.addon.ui.metadata.UICommandMetadata;
import org.jboss.forge.addon.ui.result.Result;
import org.jboss.forge.addon.ui.result.Results;
import org.jboss.forge.addon.ui.util.Metadata;
import org.jboss.forge.addon.ui.wizard.UIWizardStep;
import org.jboss.forge.furnace.container.simple.lifecycle.SimpleContainer;
import org.jboss.forge.furnace.util.Lists;
/**
* In this step, the user can choose the database tables
*/
public class DatabaseTableSelectionStep extends AbstractProjectCommand implements UIWizardStep
{
private static final String LAST_USED_CONNECTION_PROPERTIES = "LastUsedConnectionProperties";
private UISelectOne<String> databaseCatalog;
private UISelectOne<String> databaseSchema;
private UISelectMany<String> databaseTables;
private volatile Set<String> catalogValueChoices;
private volatile Set<String> schemaValueChoices;
private volatile Set<String> tableValueChoices;
private Throwable exception;
private final GenerateEntitiesCommandDescriptor descriptor;
private static final Logger logger = Logger.getLogger(DatabaseTableSelectionStep.class.getName());
public DatabaseTableSelectionStep(GenerateEntitiesCommandDescriptor descriptor)
{
this.descriptor = descriptor;
}
@Override
public UICommandMetadata getMetadata(UIContext context)
{
return Metadata.forCommand(getClass()).name("Database Table Selection")
.description("Select the database tables for which you want to generate entities");
}
@Override
public void initializeUI(UIBuilder builder) throws Exception
{
UIContext context = builder.getUIContext();
if (databaseCatalog == null)
{
InputComponentFactory factory = builder.getInputComponentFactory();
databaseCatalog = factory.createSelectOne("databaseCatalog", String.class)
.setLabel("Database Catalog")
.setDescription("The database catalog for which to generate entities.")
.setDefaultValue(() -> {
Iterator<String> it = databaseCatalog.getValueChoices().iterator();
return it.hasNext() ? it.next() : null;
})
.setValueChoices(() -> catalogValueChoices);
databaseCatalog.addValueChangeListener((event) -> updateValueChoices(context, event));
databaseSchema = factory.createSelectOne("databaseSchema", String.class)
.setLabel("Database Schema")
.setDescription("The database schema for which to generate entities.")
.setDefaultValue(() -> {
Iterator<String> it = databaseSchema.getValueChoices().iterator();
return it.hasNext() ? it.next() : null;
})
.setValueChoices(() -> schemaValueChoices);
databaseSchema.addValueChangeListener((event) -> updateValueChoices(context, event));
databaseTables = factory.createSelectMany("databaseTables", String.class)
.setLabel("Database Tables")
.setDescription("The database tables for which to generate entities. Use '*' to select all tables")
.setValueChoices(() -> tableValueChoices);
}
Database database = updateValueChoices(context, null);
if (database != null)
{
if (database.isCatalogSet())
{
databaseCatalog.setValue(database.getCatalog());
}
if (database.isSchemaSet())
{
databaseSchema.setValue(database.getSchema());
}
}
builder.add(databaseCatalog).add(databaseSchema).add(databaseTables);
}
private boolean connectionInfoHasChanged(UIContext context)
{
Map<Object, Object> attributeMap = context.getAttributeMap();
Properties currentConnectionProperties = (Properties) attributeMap.get(LAST_USED_CONNECTION_PROPERTIES);
return !Objects.equals(descriptor.getConnectionProperties(), currentConnectionProperties);
}
@Override
public void validate(UIValidationContext context)
{
UIContext uiContext = context.getUIContext();
updateValueChoices(uiContext, null);
if (exception != null)
{
if (exception instanceof UnknownHostException)
{
context.addValidationError(databaseTables, "Unknown host: " + exception.getMessage());
}
else
{
String message = exception.getMessage();
if (message == null)
{
message = String.format("%s during validation. Check logs for more information",
exception.getClass().getName());
}
context.addValidationError(databaseTables, message);
}
}
else
{
List<String> list = Lists.toList(databaseTables.getValue());
if (list == null || list.isEmpty())
{
context.addValidationError(databaseTables, "At least one database table must be specified");
}
}
}
@Override
public Result execute(UIExecutionContext context) throws Exception
{
JavaSourceFacet java = getSelectedProject(context).getFacet(JavaSourceFacet.class);
String catalog = databaseCatalog.getValue();
String schema = databaseSchema.getValue();
Collection<String> tables = Lists.toList(databaseTables.getValue());
EntityGenerator entityGenerator = new EntityGenerator();
Collection<String> entities = entityGenerator
.exportSelectedEntities(java.getSourceDirectory().getUnderlyingResourceObject(),
descriptor, catalog, schema, tables);
return Results.success(entities.size() + " entities were generated in " + descriptor.getTargetPackage());
}
private synchronized Database getDatabase(UIContext context)
{
Map<Object, Object> attributeMap = context.getAttributeMap();
Database database = (Database) attributeMap.get(Database.class.getName());
if (database == null || connectionInfoHasChanged(context))
{
try
{
database = JDBCUtils.getDatabaseInfo(descriptor);
exception = null;
attributeMap.put(Database.class.getName(), database);
attributeMap.put(LAST_USED_CONNECTION_PROPERTIES, descriptor.getConnectionProperties());
}
catch (Exception e)
{
attributeMap.remove(Database.class.getName(), database);
attributeMap.remove(LAST_USED_CONNECTION_PROPERTIES, descriptor.getConnectionProperties());
logger.log(Level.SEVERE, "Error while fetching the DB info", exception);
exception = e;
}
}
return database;
}
private Database updateValueChoices(UIContext context, ValueChangeEvent event)
{
Database database = getDatabase(context);
List<DatabaseTable> tables = new ArrayList<>();
if (database != null)
{
tables.addAll(database.getTables());
}
// Update Catalogs
catalogValueChoices = tables
.stream()
.map(DatabaseTable::getCatalog)
.filter(Objects::nonNull)
.collect(Collectors.toCollection(TreeSet::new));
final String catalog = (event != null && event.getSource() == databaseCatalog) ? (String) event.getNewValue()
: databaseCatalog.getValue();
// Update schemas
schemaValueChoices = tables
.stream()
.filter(item -> Objects.equals(item.getCatalog(), catalog))
.map(DatabaseTable::getSchema)
.filter(Objects::nonNull)
.collect(Collectors.toCollection(TreeSet::new));
final String schema = (event != null && event.getSource() == databaseSchema) ? (String) event.getNewValue()
: databaseSchema.getValue();
// Update tables
tableValueChoices = tables
.stream()
.filter(item -> Objects.equals(item.getCatalog(), catalog))
.filter(item -> Objects.equals(item.getSchema(), schema))
.map(DatabaseTable::getName)
.filter(Objects::nonNull)
.collect(Collectors.toCollection(TreeSet::new));
return database;
}
@Override
protected boolean isProjectRequired()
{
return true;
}
@Override
protected ProjectFactory getProjectFactory()
{
return SimpleContainer.getServices(getClass().getClassLoader(), ProjectFactory.class).get();
}
}