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Structr is an open source framework based on the popular Neo4j graph database.
/**
* Copyright (C) 2010-2013 Axel Morgner, structr
*
* This file is part of structr .
*
* structr is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* structr 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 General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with structr. If not, see .
*/
package org.structr.rest.resource;
import org.structr.common.PagingHelper;
import org.structr.core.Result;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.structr.core.property.PropertyKey;
import org.structr.common.SecurityContext;
import org.structr.common.error.FrameworkException;
import org.structr.core.GraphObject;
import org.structr.core.ViewTransformation;
import org.structr.core.graph.NodeFactory;
/**
*
* @author Christian Morgner
*/
public class TransformationResource extends WrappingResource {
private ViewTransformation transformation = null;
public TransformationResource(SecurityContext securityContext, ViewTransformation transformation) {
this.securityContext = securityContext;
this.transformation = transformation;
}
@Override
public boolean checkAndConfigure(String part, SecurityContext securityContext, HttpServletRequest request) throws FrameworkException {
return false; // no direct instantiation
}
@Override
public Result doGet(PropertyKey sortKey, boolean sortDescending, int pageSize, int page, String offsetId) throws FrameworkException {
if(wrappedResource != null && transformation != null) {
// allow view transformation to avoid evaluation of wrapped resource
if (transformation.evaluateWrappedResource()) {
Result result = wrappedResource.doGet(sortKey, sortDescending, NodeFactory.DEFAULT_PAGE_SIZE, NodeFactory.DEFAULT_PAGE, null);
try {
transformation.apply(securityContext, result.getResults());
result.setRawResultCount(result.size());
} catch(Throwable t) {
t.printStackTrace();
}
// apply paging later
return PagingHelper.subResult(result, pageSize, page, offsetId);
} else {
List listToTransform = new LinkedList();
transformation.apply(securityContext, listToTransform);
Result result = new Result(listToTransform, listToTransform.size(), wrappedResource.isCollectionResource(), wrappedResource.isPrimitiveArray());
// apply paging later
return PagingHelper.subResult(result, pageSize, page, offsetId);
}
}
List emptyList = Collections.emptyList();
return new Result(emptyList, null, isCollectionResource(), isPrimitiveArray());
}
@Override
public String getResourceSignature() {
if(wrappedResource != null) {
return wrappedResource.getResourceSignature();
}
return "";
}
}