/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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.
*
* Copyright (c) 2006 - 2015 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.libraries.pensol;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.ws.rs.core.MediaType;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import org.pentaho.platform.repository2.unified.webservices.RepositoryFileDto;
import org.pentaho.platform.repository2.unified.webservices.RepositoryFileTreeDto;
/**
* This class is a proxy for {@linkplain RepositoryFileTreeDto} needed to avoid loading full files' tree during the only
* request. It follows this contract: if <code>RepositoryFileTreeDto.getChildren()</code> returns <code>null</code>,
* then it is considered to be not initialised.
*
* @author Andrey Khayrutdinov
*/
public class RepositoryFileTreeDtoProxy extends RepositoryFileTreeDto {
private static final String URL_TEMPLATE = "/api/repo/files/:REPLACEMENT:/tree?depth=1&filter=*&showHidden=true";
private final RepositoryFileTreeDto dto;
private final Client client;
private final String baseUrl;
public RepositoryFileTreeDtoProxy( RepositoryFileTreeDto dto, Client client, String baseUrl ) {
this.dto = dto;
this.baseUrl = baseUrl;
this.client = client;
if ( this.dto.getFile().isFolder() ) {
this.dto.setChildren( null );
} else {
this.dto.setChildren( Collections.<RepositoryFileTreeDto>emptyList() );
}
}
public List<RepositoryFileTreeDto> getChildren() {
List<RepositoryFileTreeDto> children = dto.getChildren();
if ( children == null ) {
synchronized ( this ) {
children = dto.getChildren();
if ( children == null ) {
children = loadChildren( dto.getFile().getPath() );
dto.setChildren( children );
}
}
}
return children;
}
private List<RepositoryFileTreeDto> loadChildren( String path ) {
String encodedPath = JCRSolutionFileModel.encodePathForRequest( path );
String childrenUrl = URL_TEMPLATE.replace( ":REPLACEMENT:", encodedPath );
WebResource resource = client.resource( baseUrl + childrenUrl );
RepositoryFileTreeDto element =
resource.path( "" ).accept( MediaType.APPLICATION_XML_TYPE ).get( RepositoryFileTreeDto.class );
List<RepositoryFileTreeDto> tree;
if ( element == null || element.getChildren() == null ) {
tree = Collections.emptyList();
} else {
List<RepositoryFileTreeDto> children = element.getChildren();
tree = new ArrayList<RepositoryFileTreeDto>( children.size() );
for ( RepositoryFileTreeDto child : children ) {
RepositoryFileTreeDtoProxy dto = new RepositoryFileTreeDtoProxy( child, client, baseUrl );
tree.add( dto );
}
}
return tree;
}
public RepositoryFileDto getFile() {
return dto.getFile();
}
public void setFile( final RepositoryFileDto file ) {
dto.setFile( file );
}
public void setChildren( final List<RepositoryFileTreeDto> children ) {
dto.setChildren( children );
}
public RepositoryFileTreeDto getRealObject() {
return dto;
}
}