/*
* 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.odata4;
import java.util.ArrayList;
import java.util.List;
import org.teiid.language.Delete;
import org.teiid.language.Expression;
import org.teiid.language.ExpressionValueSource;
import org.teiid.language.Insert;
import org.teiid.language.Literal;
import org.teiid.language.NamedTable;
import org.teiid.language.Update;
import org.teiid.language.visitor.HierarchyVisitor;
import org.teiid.metadata.Column;
import org.teiid.metadata.RuntimeMetadata;
import org.teiid.olingo.common.ODataTypeManager;
import org.teiid.translator.TranslatorException;
public class ODataUpdateVisitor extends HierarchyVisitor {
protected enum OperationType {INSERT, UPDATE, DELETE};
protected ArrayList<TranslatorException> exceptions = new ArrayList<TranslatorException>();
private ODataUpdateQuery odataQuery;
private RuntimeMetadata metadata;
private OperationType operationType;
public ODataUpdateVisitor(ODataExecutionFactory ef, RuntimeMetadata metadata) {
this.odataQuery = new ODataUpdateQuery(ef, metadata);
this.metadata = metadata;
}
public OperationType getOperationType() {
return this.operationType;
}
public ODataUpdateQuery getODataQuery() {
return this.odataQuery;
}
@Override
public void visit(Insert obj) {
this.operationType = OperationType.INSERT;
visitNode(obj.getTable());
try {
// read the properties
int elementCount = obj.getColumns().size();
for (int i = 0; i < elementCount; i++) {
Column column = obj.getColumns().get(i).getMetadataObject();
List<Expression> values = ((ExpressionValueSource)obj.getValueSource()).getValues();
Expression expr = values.get(i);
Object value = resolveExpressionValue(expr);
this.odataQuery.addInsertProperty(column, ODataMetadataProcessor.getNativeType(column), value);
}
} catch (TranslatorException e) {
this.exceptions.add(e);
}
}
private Object resolveExpressionValue(Expression expr) throws TranslatorException {
Object value = null;
if (expr instanceof Literal) {
value = ((Literal)expr).getValue();
}
else if (expr instanceof org.teiid.language.Array) {
org.teiid.language.Array contents = (org.teiid.language.Array)expr;
List<Expression> arrayExprs = contents.getExpressions();
List<Object> values = new ArrayList<Object>();
for (Expression exp:arrayExprs) {
if (exp instanceof Literal) {
values.add(((Literal)exp).getValue());
}
else {
this.exceptions.add(new TranslatorException(ODataPlugin.Util.gs(ODataPlugin.Event.TEIID17029)));
}
}
value = values;
}
else {
this.exceptions.add(new TranslatorException(ODataPlugin.Util.gs(ODataPlugin.Event.TEIID17029)));
}
return value;
}
@Override
public void visit(Update obj) {
this.operationType = OperationType.UPDATE;
visitNode(obj.getTable());
this.odataQuery.setCondition(obj.getWhere());
try {
// read the properties
int elementCount = obj.getChanges().size();
for (int i = 0; i < elementCount; i++) {
Column column = obj.getChanges().get(i).getSymbol().getMetadataObject();
String type = ODataTypeManager.odataType(column.getRuntimeType())
.getFullQualifiedName().getFullQualifiedNameAsString();
Expression expr = obj.getChanges().get(i).getValue();
Object value = resolveExpressionValue(expr);
this.odataQuery.addUpdateProperty(column, type, value);
}
} catch (TranslatorException e) {
this.exceptions.add(e);
}
}
@Override
public void visit(Delete obj) {
this.operationType = OperationType.DELETE;
visitNode(obj.getTable());
this.odataQuery.setCondition(obj.getWhere());
}
@Override
public void visit(NamedTable obj) {
try {
this.odataQuery.addRootDocument(obj.getMetadataObject());
} catch (TranslatorException e) {
this.exceptions.add(e);
}
}
}