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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate.internal;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.internal.util.StringHelper;
import org.hibernate.sql.Template;
/**
* Implementation of FilterHelper.
*
* @author Steve Ebersole
* @author Rob Worsnop
*/
public class FilterHelper {
private final String[] filterNames;
private final String[] filterConditions;
private final boolean[] filterAutoAliasFlags;
private final Map[] filterAliasTableMaps;
/**
* The map of defined filters. This is expected to be in format
* where the filter names are the map keys, and the defined
* conditions are the values.
*
* @param filters The map of defined filters.
* @param dialect The sql dialect
* @param factory The session factory
*/
public FilterHelper(List filters, SessionFactoryImplementor factory) {
int filterCount = filters.size();
filterNames = new String[filterCount];
filterConditions = new String[filterCount];
filterAutoAliasFlags = new boolean[filterCount];
filterAliasTableMaps = new Map[filterCount];
Iterator iter = filters.iterator();
filterCount = 0;
while ( iter.hasNext() ) {
filterAutoAliasFlags[filterCount] = false;
final FilterConfiguration filter = (FilterConfiguration) iter.next();
filterNames[filterCount] = (String) filter.getName();
filterConditions[filterCount] = filter.getCondition();
filterAliasTableMaps[filterCount] = filter.getAliasTableMap(factory);
if ((filterAliasTableMaps[filterCount].isEmpty() || isTableFromPersistentClass(filterAliasTableMaps[filterCount])) && filter.useAutoAliasInjection()){
filterConditions[filterCount] = Template.renderWhereStringTemplate(
filter.getCondition(),
FilterImpl.MARKER,
factory.getDialect(),
factory.getSqlFunctionRegistry()
);
filterAutoAliasFlags[filterCount] = true;
}
filterConditions[filterCount] = StringHelper.replace(
filterConditions[filterCount],
":",
":" + filterNames[filterCount] + "."
);
filterCount++;
}
}
private static boolean isTableFromPersistentClass(Map aliasTableMap){
return aliasTableMap.size() == 1 && aliasTableMap.containsKey(null);
}
public boolean isAffectedBy(Map enabledFilters) {
for ( int i = 0, max = filterNames.length; i < max; i++ ) {
if ( enabledFilters.containsKey( filterNames[i] ) ) {
return true;
}
}
return false;
}
public String render(FilterAliasGenerator aliasGenerator, Map enabledFilters) {
StringBuilder buffer = new StringBuilder();
render( buffer, aliasGenerator, enabledFilters );
return buffer.toString();
}
public void render(StringBuilder buffer, FilterAliasGenerator aliasGenerator, Map enabledFilters) {
if ( filterNames != null && filterNames.length > 0 ) {
for ( int i = 0, max = filterNames.length; i < max; i++ ) {
if ( enabledFilters.containsKey( filterNames[i] ) ) {
final String condition = filterConditions[i];
if ( StringHelper.isNotEmpty( condition ) ) {
buffer.append(" and " ).append(render(aliasGenerator, i));
}
}
}
}
}
private String render(FilterAliasGenerator aliasGenerator, int filterIndex){
Map aliasTableMap = filterAliasTableMaps[filterIndex];
String condition = filterConditions[filterIndex];
if (filterAutoAliasFlags[filterIndex]){
return StringHelper.replace(condition, FilterImpl.MARKER, aliasGenerator.getAlias(aliasTableMap.get(null)));
} else if (isTableFromPersistentClass(aliasTableMap)){
return condition.replace("{alias}", aliasGenerator.getAlias(aliasTableMap.get(null)));
} else {
for (Map.Entry entry : aliasTableMap.entrySet()){
condition = condition.replace("{"+entry.getKey()+"}", aliasGenerator.getAlias(entry.getValue()));
}
return condition;
}
}
}