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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.assembly.xml;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
import static org.apache.tuscany.sca.assembly.xml.Constants.SCA11_TUSCANY_NS;
import java.util.ArrayList;
import java.util.List;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
import org.apache.tuscany.sca.contribution.processor.ContributionWriteException;
import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.Interface;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.interfacedef.impl.DataTypeImpl;
import org.apache.tuscany.sca.interfacedef.impl.InterfaceImpl;
import org.apache.tuscany.sca.interfacedef.impl.OperationImpl;
import org.apache.tuscany.sca.interfacedef.impl.TuscanyInterfaceContractImpl;
import org.apache.tuscany.sca.interfacedef.util.XMLType;
/**
* Processor for reading/writing the Tuscany interface model in order to
* support distributed interface matching
*
*/
public class InterfaceContractProcessor extends BaseAssemblyProcessor implements StAXArtifactProcessor<InterfaceContract>, Constants{
String INTERFACE_CONTRACT = "interfaceContract";
QName INTERFACE_CONTRACT_QNAME = new QName(SCA11_TUSCANY_NS, INTERFACE_CONTRACT);
String INTERFACE = "interface";
QName INTERFACE_QNAME = new QName(SCA11_TUSCANY_NS, INTERFACE);
String CALLBACK_INTERFACE = "callbackInterface";
QName CALLBACK_INTERFACE_QNAME = new QName(SCA11_TUSCANY_NS, CALLBACK_INTERFACE);
String OPERATION = "operation";
QName OPERATION_QNAME = new QName(SCA11_TUSCANY_NS, OPERATION);
String INPUT = "input";
QName INPUT_QNAME = new QName(SCA11_TUSCANY_NS, INPUT);
String OUTPUT = "output";
QName OUTPUT_QNAME = new QName(SCA11_TUSCANY_NS, OUTPUT);
String FAULT = "fault";
QName FAULT_QNAME = new QName(SCA11_TUSCANY_NS, FAULT);
String DATATYPE = "dataType";
QName DATATYPE_QNAME = new QName(SCA11_TUSCANY_NS, DATATYPE);
String GENERIC = "generic";
QName GENERIC_QNAME = new QName(SCA11_TUSCANY_NS, GENERIC);
String LOGICAL_COLLECTION = "logicalCollection";
QName LOGICAL_COLLECTION_QNAME = new QName(SCA11_TUSCANY_NS, LOGICAL_COLLECTION);
String LOGICAL_XMLTYPE = "logicalXMLType";
QName LOGICAL_XMLTYPE_QNAME = new QName(SCA11_TUSCANY_NS, LOGICAL_XMLTYPE);
String LOGICAL_TYPE = "logicalType";
QName LOGICAL_TYPE_QNAME = new QName(SCA11_TUSCANY_NS, LOGICAL_TYPE);
String PHYSICAL = "physical";
QName PHYSICAL_QNAME = new QName(SCA11_TUSCANY_NS, PHYSICAL);
String XMLTYPE = "xmlType";
QName XMLTYPE_QNAME = new QName(SCA11_TUSCANY_NS, XMLTYPE);
String NO_TYPE = "NoType";
enum Iof {
UNSET,
INPUT,
OUTPUT,
FAULT
}
enum CharacterTarget {
UNSET,
GENERIC,
PHYSICAL,
XMLTYPE
}
public InterfaceContractProcessor(ExtensionPointRegistry registry) {
super(registry.getExtensionPoint(FactoryExtensionPoint.class),
null /*registry.getExtensionPoint(StAXArtifactProcessor.class)*/);
}
public InterfaceContract read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException, XMLStreamException {
TuscanyInterfaceContractImpl interfaceContract = new TuscanyInterfaceContractImpl();
try {
InterfaceImpl iface = null;
QName name = null;
Operation operation = null;
List<DataType> inputs = null;
List<DataType> outputs = null;
List<DataType> faults = null;
XMLType logicalXMLType = null;
Iof iof = Iof.UNSET;
CharacterTarget characterTarget = CharacterTarget.UNSET;
boolean logicalCollection = false;
DataType dataType = null;
while (reader.hasNext()) {
int event = reader.getEventType();
switch (event) {
case START_ELEMENT:
name = reader.getName();
if (INTERFACE_CONTRACT_QNAME.equals(name)){
} else if (INTERFACE_QNAME.equals(name)){
iface = new InterfaceImpl();
interfaceContract.setInterface(iface);
iface.setRemotable(getBoolean(reader, "isRemotable"));
} else if (CALLBACK_INTERFACE_QNAME.equals(name)){
iface = new InterfaceImpl();
interfaceContract.setCallbackInterface(iface);
iface.setRemotable(getBoolean(reader, "isRemotable"));
} else if (OPERATION_QNAME.equals(name)) {
operation = new OperationImpl();
iface.getOperations().add(operation);
operation.setName(getString(reader, "name"));
operation.setDynamic(getBoolean(reader, "isDynamic"));
operation.setNonBlocking(getBoolean(reader, "isNonBlocking"));
operation.setInputWrapperStyle(getBoolean(reader, "isInputWrapperStyle"));
operation.setOutputWrapperStyle(getBoolean(reader, "isOutputWrapperStyle"));
inputs = new ArrayList<DataType>();
DataType inputType = new DataTypeImpl<List<DataType>>(null, null);
inputType.setLogical(inputs);
operation.setInputType(inputType);
outputs = new ArrayList<DataType>();
DataType outputType = new DataTypeImpl<List<DataType>>(null, null);
outputType.setLogical(outputs);
operation.setOutputType(outputType);
faults = new ArrayList<DataType>();
operation.setFaultTypes(faults);
} else if (INPUT_QNAME.equals(name)) {
iof = Iof.INPUT;
} else if (OUTPUT_QNAME.equals(name)) {
iof = Iof.OUTPUT;
} else if (FAULT_QNAME.equals(name)) {
iof = Iof.FAULT;
} else if (DATATYPE_QNAME.equals(name)){
DataType newDataType = new DataTypeImpl<XMLType>(null, null);
newDataType.setDataBinding(getString(reader, "dataBinding"));
if (logicalCollection) {
dataType.setLogical(newDataType);
dataType = newDataType;
} else if (iof == Iof.INPUT) {
inputs.add(newDataType);
dataType = newDataType;
} else if (iof == Iof.OUTPUT){
outputs.add(newDataType);
dataType = newDataType;
} else if (iof == Iof.FAULT){
faults.add(newDataType);
dataType = newDataType;
}
} else if (GENERIC_QNAME.equals(name)){
characterTarget = CharacterTarget.GENERIC;
} else if (PHYSICAL_QNAME.equals(name)){
characterTarget = CharacterTarget.PHYSICAL;
} else if (LOGICAL_COLLECTION_QNAME.equals(name)){
logicalCollection = true;
} else if (LOGICAL_XMLTYPE_QNAME.equals(name)){
characterTarget = CharacterTarget.XMLTYPE;
logicalXMLType = new XMLType(null, null);
dataType.setLogical(logicalXMLType);
} else if (LOGICAL_TYPE_QNAME.equals(name)){
// is this ever used?
} else if (XMLTYPE_QNAME.equals(name)){
// is this ever used?
} else {
System.out.println("Unexpected element " + name);
}
break;
case XMLStreamConstants.CHARACTERS:
if (characterTarget == CharacterTarget.GENERIC){
String generic = reader.getText();
// Not sure what to do with this as we may not have the actual type
} else if (characterTarget == CharacterTarget.PHYSICAL){
String physical = reader.getText();
// Not sure what to do with this as we may not have the actual type
} else if (characterTarget == CharacterTarget.XMLTYPE) {
String xmlType = reader.getText();
if (!xmlType.equals(NO_TYPE)){
int splitPoint = xmlType.indexOf("}");
String namespace = xmlType.substring(1, splitPoint);
String localname = xmlType.substring(splitPoint + 1);
QName typeName = new QName(namespace, localname);
logicalXMLType.setTypeName(typeName);
}
}
characterTarget = CharacterTarget.UNSET;
break;
case END_ELEMENT:
name = reader.getName();
if (INPUT_QNAME.equals(name) ||
OUTPUT_QNAME.equals(name) ||
FAULT_QNAME.equals(name)) {
iof = Iof.UNSET;
} else if (LOGICAL_COLLECTION_QNAME.equals(name)) {
logicalCollection = false;
}
}
// Read the next element
if (reader.hasNext()) {
reader.next();
}
}
} catch (XMLStreamException e) {
ContributionReadException ex = new ContributionReadException(e);
//error(monitor, "XMLStreamException", reader, ex);
}
return interfaceContract;
}
public void write(InterfaceContract interfaceContract, XMLStreamWriter writer, ProcessorContext context)
throws ContributionWriteException, XMLStreamException {
if (interfaceContract == null || interfaceContract.getInterface() == null) {
return;
}
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, INTERFACE_CONTRACT);
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, INTERFACE);
writeInterface(interfaceContract.getInterface(), writer, context);
if (interfaceContract.getCallbackInterface() != null){
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, CALLBACK_INTERFACE);
writeInterface(interfaceContract.getCallbackInterface(), writer, context);
}
writer.writeEndElement();
}
private void writeInterface(Interface iface, XMLStreamWriter writer, ProcessorContext context) throws XMLStreamException {
writer.writeAttribute("isRemotable", String.valueOf(iface.isRemotable()));
for (Operation operation : iface.getOperations()){
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, OPERATION);
writer.writeAttribute("name", operation.getName());
writer.writeAttribute("isDynamic", String.valueOf(operation.isDynamic()));
writer.writeAttribute("isNonBlocking", String.valueOf(operation.isNonBlocking()));
writer.writeAttribute("isInputWrapperStyle", String.valueOf(operation.isInputWrapperStyle()));
writer.writeAttribute("isOutputWrapperStyle", String.valueOf(operation.isOutputWrapperStyle()));
List<DataType> outputTypes = operation.getOutputType().getLogical();
List<DataType> inputTypes = operation.getInputType().getLogical();
List<DataType> faultTypes = operation.getFaultTypes();
if (operation.isInputWrapperStyle() && operation.getInputWrapper() != null) {
inputTypes = operation.getInputWrapper().getUnwrappedType().getLogical();
}
if (operation.isOutputWrapperStyle() && operation.getOutputWrapper() != null) {
outputTypes = operation.getOutputWrapper().getUnwrappedType().getLogical();
}
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, INPUT);
writeDataTypes(inputTypes, writer);
writer.writeEndElement();
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, OUTPUT);
writeDataTypes(outputTypes, writer);
writer.writeEndElement();
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, FAULT);
writeDataTypes(faultTypes, writer);
writer.writeEndElement();
writer.writeEndElement();
}
writer.writeEndElement();
}
private void writeDataTypes(List<DataType> dataTypes, XMLStreamWriter writer) throws XMLStreamException {
for(DataType dataType : dataTypes){
writeDataType(dataType, writer);
}
}
private void writeDataType(DataType<?> dataType, XMLStreamWriter writer) throws XMLStreamException {
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, DATATYPE);
if (dataType.getDataBinding() != null){
writer.writeAttribute("dataBinding", dataType.getDataBinding());
}
if (dataType.getGenericType() != null){
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, GENERIC);
writer.writeCharacters(dataType.getGenericType().toString());
writer.writeEndElement();
}
if (dataType.getLogical() instanceof DataType){
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, LOGICAL_COLLECTION);
writeDataType((DataType<?>)dataType.getLogical(), writer);
} else if (dataType.getLogical() instanceof XMLType){
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, LOGICAL_XMLTYPE);
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, XMLTYPE);
XMLType xmlType = (XMLType)dataType.getLogical();
if (xmlType.getTypeName() != null){
writer.writeCharacters(xmlType.getTypeName().toString());
} else {
writer.writeCharacters("NoType");
}
writer.writeEndElement();
} else {
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, LOGICAL_TYPE);
writer.writeCharacters(dataType.getLogical().toString());
}
writer.writeEndElement();
if (dataType.getPhysical() != null){
writer.writeStartElement(Constants.SCA11_TUSCANY_NS, PHYSICAL);
writer.writeCharacters(dataType.getPhysical().getName());
writer.writeEndElement();
}
writer.writeEndElement();
}
public void resolve(InterfaceContract interfaceContract, ModelResolver resolver, ProcessorContext context)
throws ContributionResolveException {
// do nothing
}
public QName getArtifactType() {
// these internal interface contracts aren't found in the composite file
return null;
}
public Class<InterfaceContract> getModelType() {
return InterfaceContract.class;
}
}
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