QuerySupport.java

/**
 * OpenSpotLight - Open Source IT Governance Platform
 *
 * Copyright (c) 2009, CARAVELATECH CONSULTORIA E TECNOLOGIA EM INFORMATICA LTDA
 * 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 CARAVELATECH CONSULTORIA E
 * TECNOLOGIA EM INFORMATICA LTDA.
 *
 * 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
 *
 ***********************************************************************
 * OpenSpotLight - Plataforma de Governança de TI de Código Aberto
 *
 * Direitos Autorais Reservados (c) 2009, CARAVELATECH CONSULTORIA E TECNOLOGIA
 * EM INFORMATICA LTDA ou como contribuidores terceiros indicados pela etiqueta
 * @author ou por expressa atribuição de direito autoral declarada e atribuída pelo autor.
 * Todas as contribuições de terceiros estão distribuídas sob licença da
 * CARAVELATECH CONSULTORIA E TECNOLOGIA EM INFORMATICA LTDA.
 *
 * Este programa é software livre; você pode redistribuí-lo e/ou modificá-lo sob os
 * termos da Licença Pública Geral Menor do GNU conforme publicada pela Free Software
 * Foundation.
 *
 * Este programa é distribuído na expectativa de que seja útil, porém, SEM NENHUMA
 * GARANTIA; nem mesmo a garantia implícita de COMERCIABILIDADE OU ADEQUAÇÃO A UMA
 * FINALIDADE ESPECÍFICA. Consulte a Licença Pública Geral Menor do GNU para mais detalhes.
 *
 * Você deve ter recebido uma cópia da Licença Pública Geral Menor do GNU junto com este
 * programa; se não, escreva para:
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 */
package org.openspotlight.graph.query;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.openspotlight.graph.Node;
import org.openspotlight.graph.exception.MetaNodeTypeNotFoundException;
import org.openspotlight.graph.metadata.MetaNodeType;
import org.openspotlight.graph.metadata.Metadata;
import org.openspotlight.graph.query.info.SelectInfo;
import org.openspotlight.graph.query.info.SelectStatementInfo;
import org.openspotlight.storage.domain.StorageNode;

/**
 * The Class SLQuerySupport.
 * 
 * @author Vitor Hugo Chagas
 */
public class QuerySupport {

    /**
     * Gets the hierarchy type names.
     * 
     * @param metadata the metadata
     * @param typeName the type name
     * @param subTypes the sub types
     * @return the hierarchy type names
     */
    static List<String> getHierarchyTypeNames(final Metadata metadata,
                                               final String typeName,
                                               final boolean subTypes)
        throws MetaNodeTypeNotFoundException {
        final List<String> types = new ArrayList<String>();
        types.add(typeName);
        if (subTypes) {
            final MetaNodeType type = metadata.getMetaNodeType(typeName);
            throw new UnsupportedOperationException();
            //FIXME
            //            for (final MetaNodeType currentType : type.getSubMetaNodeTypes()) {
            //                types.add(currentType.getTypeName());
            //            }
        }
        return types;
    }

    /**
     * Gets the node i ds.
     * 
     * @param nodes the nodes
     * @return the node i ds
     */
    static String[] getNodeIDs(final Collection<Node> nodes) {
        if (nodes == null) { return null; }
        int count = 0;
        final String[] ids = new String[nodes.size()];
        for (final Node node: nodes) {
            ids[count++] = node.getId();
        }
        return ids;
    }

    /**
     * Gets the select info.
     * 
     * @param select the select
     * @return the select info
     */
    static SelectInfo getSelectInfo(final Select select) {
        final SelectInfoGetter getter = (SelectInfoGetter) select;
        return getter.getSelectInfo();
    }

    /**
     * Gets the select statement info.
     * 
     * @param select the select
     * @return the select statement info
     */
    static SelectStatementInfo getSelectStatementInfo(final Select select) {
        final SelectStatementInfoGetter getter = (SelectStatementInfoGetter) select;
        return getter.getSelectStatementInfo();
    }

    /**
     * Map nodes by type.
     * 
     * @param selectNodeWrappers the select node wrappers
     * @return the map< string, list
     *         < p node wrapper>
     *         >
     * @throws SLPersistentTreeSessionException the SL persistent tree session exception
     */
    static Map<String, List<StorageNode>> mapNodesByType(final Collection<StorageNode> selectNodeWrappers) {
        final Map<String, List<StorageNode>> nodeWrapperListMap = new HashMap<String, List<StorageNode>>();
        for (final StorageNode pNodeWrapper: selectNodeWrappers) {
            final String typeName = pNodeWrapper.getType();
            List<StorageNode> typeNodes = nodeWrapperListMap.get(typeName);
            if (typeNodes == null) {
                typeNodes = new ArrayList<StorageNode>();
                nodeWrapperListMap.put(typeName, typeNodes);
            }
            typeNodes.add(pNodeWrapper);
        }
        return nodeWrapperListMap;
    }

}