/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.translator.google.visitor;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import org.teiid.core.types.DataTypeManager;
import org.teiid.language.Expression;
import org.teiid.language.Literal;
import org.teiid.language.SetClause;
import org.teiid.language.Update;
import org.teiid.translator.google.api.SpreadsheetOperationException;
import org.teiid.translator.google.api.UpdateSet;
import org.teiid.translator.google.api.metadata.SpreadsheetInfo;
/**
* Translates SQL UPDATE commands
*
*
* @author felias
*
*/
public class SpreadsheetUpdateVisitor extends SpreadsheetCriteriaVisitor {
public SpreadsheetUpdateVisitor(SpreadsheetInfo info) {
super(info);
}
private List<UpdateSet> changes;
public void visit(Update obj) {
worksheetTitle = obj.getTable().getName();
changes = new ArrayList<UpdateSet>();
String columnName;
if (obj.getTable().getMetadataObject().getNameInSource() != null) {
this.worksheetTitle = obj.getTable().getMetadataObject().getNameInSource();
}
worksheetKey = info.getWorksheetByName(worksheetTitle).getId();
for (SetClause s : obj.getChanges()) {
if(s.getSymbol().getMetadataObject().getNameInSource()!=null){
columnName=s.getSymbol().getMetadataObject().getNameInSource();
}else{
columnName=s.getSymbol().getMetadataObject().getName();
}
changes.add(new UpdateSet(columnName, getStringValue(s.getValue())));
}
translateWhere(obj.getWhere());
}
protected String getStringValue(Expression obj) {
Literal literal;
if (obj instanceof Literal) {
literal = (Literal) obj;
} else {
throw new SpreadsheetOperationException("Spreadsheet translator internal error: Expression is not allowed in the set clause"); //$NON-NLS-1$
}
if (literal.getValue() == null) {
if (literal.getType().equals(DataTypeManager.DefaultDataClasses.STRING)) {
throw new SpreadsheetOperationException("Spreadsheet translator error: String values cannot be set to null"); //$NON-NLS-1$
}
return ""; //$NON-NLS-1$
}
if (literal.getType().equals(DataTypeManager.DefaultDataClasses.DATE)) {
return new java.text.SimpleDateFormat("MM/dd/yyyy").format(literal.getValue());
} else if (literal.getType().equals(DataTypeManager.DefaultDataClasses.TIMESTAMP)) {
return new SimpleDateFormat("MM/dd/yyyy HH:mm:ss").format(literal.getValue());
}
if (literal.getType().equals(DataTypeManager.DefaultDataClasses.STRING)) {
return "'"+literal.getValue().toString();
}
return literal.getValue().toString();
}
public List<UpdateSet> getChanges() {
return changes;
}
public void setChanges(List<UpdateSet> changes) {
this.changes = changes;
}
}