/*
* 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.odata;
import java.io.InputStreamReader;
import java.sql.Blob;
import java.sql.SQLException;
import java.util.Arrays;
import java.util.List;
import javax.ws.rs.core.Response.Status;
import org.odata4j.core.ODataVersion;
import org.odata4j.core.OObject;
import org.odata4j.core.OSimpleObject;
import org.odata4j.edm.EdmDataServices;
import org.odata4j.format.FormatParser;
import org.odata4j.format.FormatParserFactory;
import org.odata4j.format.FormatType;
import org.odata4j.format.Settings;
import org.teiid.language.Call;
import org.teiid.metadata.RuntimeMetadata;
import org.teiid.metadata.Schema;
import org.teiid.translator.DataNotAvailableException;
import org.teiid.translator.ExecutionContext;
import org.teiid.translator.ProcedureExecution;
import org.teiid.translator.TranslatorException;
import org.teiid.translator.WSConnection;
import org.teiid.translator.ws.BinaryWSProcedureExecution;
public class ODataProcedureExecution extends BaseQueryExecution implements ProcedureExecution {
private ODataProcedureVisitor visitor;
private Object returnValue;
private ODataEntitiesResponse response;
private Class<?>[] expectedColumnTypes;
public ODataProcedureExecution(Call command, ODataExecutionFactory translator, ExecutionContext executionContext, RuntimeMetadata metadata, WSConnection connection) throws TranslatorException {
super(translator, executionContext, metadata, connection);
this.visitor = new ODataProcedureVisitor(translator, metadata);
this.visitor.visitNode(command);
if (!this.visitor.exceptions.isEmpty()) {
throw this.visitor.exceptions.get(0);
}
this.expectedColumnTypes = command.getResultSetColumnTypes();
}
@Override
public void execute() throws TranslatorException {
String URI = this.visitor.buildURL();
Schema schema = visitor.getProcedure().getParent();
EdmDataServices edm = new TeiidEdmMetadata(schema.getName(), ODataEntitySchemaBuilder.buildMetadata(schema));
if (this.visitor.hasCollectionReturn()) {
if (this.visitor.isReturnComplexType()) {
// complex return
this.response = executeWithComplexReturn(this.visitor.getMethod(), URI, null, this.visitor.getReturnEntityTypeName(), edm, null, Status.OK, Status.NO_CONTENT);
}
else {
// entity type return
this.response = executeWithReturnEntity(this.visitor.getMethod(), URI, null, this.visitor.getTable().getName(), edm, null, Status.OK, Status.NO_CONTENT);
}
if (this.response != null && this.response.hasError()) {
throw this.response.getError();
}
}
else {
try {
BinaryWSProcedureExecution execution = executeDirect(this.visitor.getMethod(), URI, null, getDefaultHeaders());
if (execution.getResponseCode() != Status.OK.getStatusCode()) {
throw buildError(execution);
}
Blob blob = (Blob)execution.getOutputParameterValues().get(0);
ODataVersion version = getODataVersion(execution);
// if the procedure is not void
if (this.visitor.getReturnType() != null) {
FormatParser<? extends OObject> parser = FormatParserFactory.getParser(OSimpleObject.class,
FormatType.ATOM, new Settings(version, edm, this.visitor.getProcedure().getName(),
null, // entitykey
true, // isResponse
ODataTypeManager.odataType(this.visitor.getReturnType())));
OSimpleObject object = (OSimpleObject)parser.parse(new InputStreamReader(blob.getBinaryStream()));
this.returnValue = this.translator.retrieveValue(object.getValue(), this.visitor.getReturnTypeClass());
}
} catch (SQLException e) {
throw new TranslatorException(e);
}
}
}
@Override
public List<?> next() throws TranslatorException, DataNotAvailableException {
// Feed based response
if (this.visitor.hasCollectionReturn() && this.response != null ) {
return this.response.getNextRow(this.visitor.getReturnColumns(), this.expectedColumnTypes);
}
return null;
}
@Override
public List<?> getOutputParameterValues() throws TranslatorException {
return Arrays.asList(this.returnValue);
}
@Override
public void close() {
}
@Override
public void cancel() throws TranslatorException {
}
}