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 / symboltable / FeatureSymbolTableImpl.java @ 45739
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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.symboltable; |
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import org.gvsig.fmap.dal.expressionevaluator.TableAttributeHandler; |
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import org.apache.commons.lang3.Range; |
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import org.apache.commons.lang3.StringUtils; |
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import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator; |
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import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
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import org.gvsig.expressionevaluator.Function; |
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import org.gvsig.expressionevaluator.Interpreter; |
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import org.gvsig.expressionevaluator.MutableSymbolTable; |
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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.expressionevaluator.spi.AbstractSymbolTable; |
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import static org.gvsig.fmap.dal.DataManager.FUNCTION_CURRENT_ROW; |
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import org.gvsig.fmap.dal.expressionevaluator.FeatureSymbolTable; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
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import org.gvsig.fmap.dal.feature.FeatureStore; |
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import org.gvsig.fmap.dal.feature.FeatureType; |
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/**
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*
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* @author jjdelcerro
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*/
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@SuppressWarnings("UseSpecificCatch") |
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public class FeatureSymbolTableImpl extends AbstractSymbolTable implements FeatureSymbolTable { |
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private static final String DAL_SYMBOL_TABLE_FEATURE = "DALSymbolTableFeature"; |
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private final Function current_row; |
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private Feature feature;
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private FeatureType type;
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private String storeName; |
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private final TableAttributeHandler storeAttributeHandler; |
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@SuppressWarnings("OverridableMethodCallInConstructor") |
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public FeatureSymbolTableImpl() {
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this(DAL_SYMBOL_TABLE_FEATURE);
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} |
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public FeatureSymbolTableImpl(String name) { |
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super(name);
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this.current_row = new AbstractFunction( |
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DALFunctions.GROUP_DATA_ACCESS, |
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FUNCTION_CURRENT_ROW, |
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Range.is(0),
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"Return the current row when used in a table filter.\n"
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+ "Return null if used outer a table filter.",
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FUNCTION_CURRENT_ROW + "()",
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null,
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"Feature"
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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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return feature;
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} |
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}; |
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this.storeAttributeHandler = new TableAttributeHandler() { |
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@Override
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public Object get(String name) { |
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if( feature==null ) { |
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return null; |
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} |
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try {
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return feature.get(name);
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} catch (Exception ex) { |
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return feature.getExtraValue(name);
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} |
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} |
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@Override
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public String getName() { |
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return storeName;
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} |
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}; |
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} |
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@Override
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public FeatureSymbolTableImpl clone() throws CloneNotSupportedException { |
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FeatureSymbolTableImpl other = (FeatureSymbolTableImpl) super.clone();
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return other;
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} |
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@Override
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public Function function(String name) { |
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if (StringUtils.equalsIgnoreCase(name, FUNCTION_CURRENT_ROW)) {
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return this.current_row; |
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} |
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return super.function(name); |
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} |
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@Override
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public boolean exists(String name) { |
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if (feature == null) { |
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return false; |
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} |
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if (this.feature.hasValue(name)) { |
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return true; |
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} |
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if (StringUtils.equalsIgnoreCase(name, this.storeName) || |
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StringUtils.equalsIgnoreCase(name, SYMBOL_CURRENT_TABLE) || |
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StringUtils.equalsIgnoreCase(name, SYMBOL_CURRENT_ROW) ) { |
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return true; |
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} |
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return false; |
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} |
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@Override
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public Object value(String name) { |
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if (feature == null) { |
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return null; |
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} |
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try {
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return this.feature.get(name); |
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} catch (Exception ex) { |
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//DO NOTHING
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} |
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if (StringUtils.equalsIgnoreCase(name, SYMBOL_CURRENT_ROW)) {
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return this.feature; |
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} |
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if (StringUtils.equalsIgnoreCase(name, this.storeName) |
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|| StringUtils.equalsIgnoreCase(name, SYMBOL_CURRENT_TABLE)) { |
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return this.storeAttributeHandler; |
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} |
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return null; |
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} |
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@Override
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public boolean isSQLCompatible(String name) { |
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if (this.type == null) { |
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return super.isSQLCompatible(name); |
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} |
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FeatureAttributeDescriptor attrdesc = this.type.getAttributeDescriptor(name);
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if (attrdesc == null) { |
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return true; |
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} |
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if (attrdesc.isComputed()) {
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return false; |
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} |
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return true; |
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} |
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@Override
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public void setFeature(Feature feature) { |
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this.feature = feature;
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if (this.type == null && this.feature!=null ) { |
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this.type = feature.getType();
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FeatureStore store = feature.getStore(); |
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if (store != null) { |
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this.storeName = store.getName();
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} |
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} |
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} |
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@Override
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public MutableSymbolTable createParent() {
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ExpressionEvaluatorManager expManager = ExpressionEvaluatorLocator.getManager(); |
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MutableSymbolTable symbolTable = expManager.createSymbolTable(); |
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symbolTable.addSymbolTable(this);
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return symbolTable;
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} |
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} |