org.hibernate.util.FilterHelper Maven / Gradle / Ivy
/*
* 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.util;
import org.hibernate.sql.Template;
import org.hibernate.impl.FilterImpl;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.function.SQLFunctionRegistry;
import java.util.Map;
import java.util.Iterator;
/**
* Implementation of FilterHelper.
*
* @author Steve Ebersole
*/
public class FilterHelper {
private final String[] filterNames;
private final String[] filterConditions;
/**
* 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 functionRegistry The SQL function registry
*/
public FilterHelper(Map filters, Dialect dialect, SQLFunctionRegistry functionRegistry) {
int filterCount = filters.size();
filterNames = new String[filterCount];
filterConditions = new String[filterCount];
Iterator iter = filters.entrySet().iterator();
filterCount = 0;
while ( iter.hasNext() ) {
final Map.Entry entry = (Map.Entry) iter.next();
filterNames[filterCount] = (String) entry.getKey();
filterConditions[filterCount] = Template.renderWhereStringTemplate(
(String) entry.getValue(),
FilterImpl.MARKER,
dialect,
functionRegistry
);
filterConditions[filterCount] = StringHelper.replace( filterConditions[filterCount],
":",
":" + filterNames[filterCount] + "." );
filterCount++;
}
}
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(String alias, Map enabledFilters) {
StringBuffer buffer = new StringBuffer();
render( buffer, alias, enabledFilters );
return buffer.toString();
}
public void render(StringBuffer buffer, String alias, 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( StringHelper.replace( condition, FilterImpl.MARKER, alias ) );
}
}
}
}
}
}