svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / main / java / org / gvsig / expressionevaluator / impl / function / dataaccess / CreateInMemoryTableFunction.java @ 44925
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2020 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.expressionevaluator.impl.function.dataaccess; |
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import java.util.Collections; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.Map; |
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import java.util.Set; |
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import org.apache.commons.lang3.Range; |
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import org.gvsig.expressionevaluator.ExpressionRuntimeException; |
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import org.gvsig.expressionevaluator.Interpreter; |
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import org.gvsig.expressionevaluator.impl.DALFunctions; |
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import org.gvsig.expressionevaluator.spi.AbstractFunction; |
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import org.gvsig.fmap.dal.AbstractStoresRepository; |
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import org.gvsig.fmap.dal.DALLocator; |
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import org.gvsig.fmap.dal.DataManager; |
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import static org.gvsig.fmap.dal.DataManager.FUNCTION_CREATE_IN_MEMORY_TABLE; |
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import org.gvsig.fmap.dal.DataStore; |
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import org.gvsig.fmap.dal.DataStoreParameters; |
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import org.gvsig.fmap.dal.StoresRepository; |
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import org.gvsig.fmap.dal.feature.EditableFeatureType; |
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import org.gvsig.fmap.dal.feature.FeatureStore; |
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import org.gvsig.tools.util.UnmodifiableBasicSet; |
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import org.gvsig.tools.util.UnmodifiableBasicSetAdapter; |
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/**
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*
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* @author jjdelcerro
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*/
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public class CreateInMemoryTableFunction extends AbstractFunction { |
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public CreateInMemoryTableFunction() {
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super( DALFunctions.GROUP_DATA_ACCESS,
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FUNCTION_CREATE_IN_MEMORY_TABLE, |
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Range.is(2),
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"Create a table in memory with the same structure as the indicated table. Return a reference to the new table.",
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"CREATE IN MEMORY TABLE {{new_table_name}} FROM source_table_name",
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new String[]{ |
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"new_table_name - Name of the new table to create.",
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"source_table_name - Name of the table to copy their structure."
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}, |
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"Table",
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false
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); |
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} |
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@Override
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public boolean allowConstantFolding() { |
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return false; |
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} |
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@Override
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public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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DataManager dataManager = DALLocator.getDataManager(); |
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StoresRepository storesRepository = dataManager.getStoresRepository(); |
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MemoryStoresRepository repo = (MemoryStoresRepository) storesRepository.getSubrepository("Temporary");
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if( repo == null ) { |
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repo = new MemoryStoresRepository("Temporary"); |
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storesRepository.addRepository(repo); |
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} |
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String targetName = getStr(args,0); |
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String sourceName = getStr(args,1); |
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FeatureStore source = (FeatureStore) storesRepository.getStore(sourceName); |
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if( source == null ) { |
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throw new ExpressionRuntimeException("Can't locate source table '"+sourceName+"'."); |
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} |
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EditableFeatureType featureType = source.getDefaultFeatureType().getEditable(); |
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FeatureStore target = dataManager.createMemoryStore(null);
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target.edit(); |
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target.update(featureType); |
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target.finishEditing(); |
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repo.add(targetName, target); |
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return target;
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} |
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private class MemoryStoresRepository extends AbstractStoresRepository { |
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private final Map<String,FeatureStore> repository; |
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public MemoryStoresRepository(String name) { |
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super(name);
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this.repository = new HashMap<>(); |
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} |
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public void add(String name, FeatureStore store) { |
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this.repository.put(name, store);
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} |
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@Override
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protected DataStoreParameters getMyParameters(String name) { |
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FeatureStore store = this.repository.get(name);
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return store.getParameters();
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} |
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@Override
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protected boolean isEmptyMyRepository() { |
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return this.repository.isEmpty(); |
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} |
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@Override
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protected int getMySize() { |
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return this.repository.size(); |
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} |
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@Override
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protected UnmodifiableBasicSet<String> getMyKeySet() { |
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Set<String> keyset = this.repository.keySet(); |
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if( keyset == null || keyset.isEmpty() ) { |
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return UnmodifiableBasicSet.EMPTY_UNMODIFIABLEBASICSET;
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} |
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return new UnmodifiableBasicSetAdapter<>(keyset); |
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} |
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@Override
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public DataStore getStore(String name) { |
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FeatureStore store = this.repository.get(name);
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return store;
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} |
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@Override
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public void add(String name, DataStoreParameters parameters) { |
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} |
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@Override
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public boolean contains(DataStoreParameters parameters) { |
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return false; |
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} |
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@Override
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public boolean containsKey(String key) { |
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return this.repository.containsKey(key); |
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} |
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@Override
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public Iterator<DataStoreParameters> iterator() { |
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return Collections.EMPTY_LIST.iterator(); |
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} |
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@Override
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public void remove(String name) { |
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this.repository.remove(name);
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} |
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} |
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} |