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/*
 * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package com.sun.tools.ws.processor.modeler.wsdl;

import com.sun.tools.ws.processor.generator.Names;
import static com.sun.tools.ws.processor.modeler.wsdl.WSDLModelerBase.getExtensionOfType;
import com.sun.tools.ws.wscompile.ErrorReceiver;
import com.sun.tools.ws.wscompile.WsimportOptions;
import com.sun.tools.ws.wscompile.Options;
import com.sun.tools.ws.wsdl.document.*;
import com.sun.tools.ws.wsdl.document.jaxws.JAXWSBinding;
import com.sun.tools.ws.wsdl.document.schema.SchemaKinds;
import com.sun.tools.ws.wsdl.document.soap.SOAP12Binding;
import com.sun.tools.ws.wsdl.document.soap.SOAPBinding;
import org.xml.sax.InputSource;

import javax.xml.namespace.QName;
import java.io.ByteArrayInputStream;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.text.MessageFormat;
import java.util.*;


/**
 * Builds all possible pseudo schemas for async operation ResponseBean to feed to XJC.
 *
 * @author Vivek Pandey 
 */
public class PseudoSchemaBuilder {

    private final StringWriter buf = new StringWriter();
    private final WSDLDocument wsdlDocument;
    private WSDLModeler wsdlModeler;
    private final List schemas = new ArrayList();
    private final HashMap bindingNameToPortMap = new HashMap();
    private static final String w3ceprSchemaBinding = "\n" +
            "  \n" +
            "  \n" +
   //comment the following, otw JAXB won't generate ObjectFactory, classes from wsa schema. See JAX-WS-804
   //         "    \n" +
            "    \n" +
            "      \n" +
            "    \n" +
            "    \n" +
            "      \n" +
            "    \n" +
            "  \n" +
            "";

    private static final String memberSubmissionEPR = "\n" +
            "  \n" +
            "  \n" +
//comment the following, otw JAXB won't generate ObjectFactory, classes from wsa schema. See JAX-WS-804
//            "    \n" +
            "    \n" +
            "      \n" +
            "    \n" +
            "    \n" +
            "      \n" +
            "    \n" +
            "  \n" +
            "";

    private final static String sysId = "http://dummy.pseudo-schema#schema";

    private WsimportOptions options;
    public static List build(WSDLModeler wsdlModeler, WsimportOptions options, ErrorReceiver errReceiver) {
        PseudoSchemaBuilder b = new PseudoSchemaBuilder(wsdlModeler.document);
        b.wsdlModeler = wsdlModeler;
        b.options = options;
        b.build();
        int i;
        for(i = 0; i < b.schemas.size(); i++){
            InputSource is = b.schemas.get(i);
            is.setSystemId(sysId+(i + 1));
        }
        //add w3c EPR binding
        if(!(options.noAddressingBbinding) && options.target.isLaterThan(Options.Target.V2_1)){
            InputSource is = new InputSource(new ByteArrayInputStream(getUTF8Bytes(w3ceprSchemaBinding)));
            is.setSystemId(sysId+(++i +1));
            b.schemas.add(is);
        }


        //TODO: uncomment after JAXB fixes the issue related to passing multiples of such bindings
        //add member submission EPR binding
//        InputSource is1 = new InputSource(new ByteArrayInputStream(memberSubmissionEPR.getBytes()));
//        is1.setSystemId(sysId+(++i + 1));
//        b.schemas.add(is1);

        return b.schemas;
    }

    private static byte[] getUTF8Bytes(String w3ceprSchemaBinding1) {
        try {
            return w3ceprSchemaBinding1.getBytes("UTF-8");
        } catch (UnsupportedEncodingException unexpected) {
            // should never happen
            throw new IllegalStateException(unexpected);
        }
    }


    private PseudoSchemaBuilder(WSDLDocument _wsdl) {
        this.wsdlDocument = _wsdl;
    }

    private void build() {
        for(Iterator itr=wsdlDocument.getDefinitions().services(); itr.hasNext(); ) {
            build(itr.next());
        }
    }

    private void build(Service service) {
        for( Iterator itr=service.ports(); itr.hasNext(); ) {
            build(itr.next() );
        }
    }

    private void build(Port port) {
        if(wsdlModeler.isProvider(port))
            return;
        Binding binding = port.resolveBinding(wsdlDocument);

        SOAPBinding soapBinding =
                    (SOAPBinding)getExtensionOfType(binding, SOAPBinding.class);
        //lets try and see if its SOAP 1.2. dont worry about extension flag, its
        // handled much earlier
        if (soapBinding == null) {
                    soapBinding =
                            (SOAPBinding)getExtensionOfType(binding, SOAP12Binding.class);
        }
        if(soapBinding == null)
            return;
        PortType portType = binding.resolvePortType(wsdlDocument);

        QName bindingName = WSDLModelerBase.getQNameOf(binding);

        //we dont want to process the port bound to the binding processed earlier
        if(bindingNameToPortMap.containsKey(bindingName))
            return;

        bindingNameToPortMap.put(bindingName, port);


        for(Iterator itr=binding.operations(); itr.hasNext();){
            BindingOperation bindingOperation = (BindingOperation)itr.next();

            // get only the bounded operations
            Set boundedOps = portType.getOperationsNamed(bindingOperation.getName());
            if(boundedOps.size() != 1)
                continue;
            Operation operation = (Operation)boundedOps.iterator().next();

            // No pseudo schema required for doc/lit
            if(wsdlModeler.isAsync(portType, operation)){
                buildAsync(portType, operation, bindingOperation);
            }
        }
    }

    /**
     * @param portType
     * @param operation
     * @param bindingOperation
     */
    private void buildAsync(PortType portType, Operation operation, BindingOperation bindingOperation) {
        String operationName = getCustomizedOperationName(operation);//operation.getName();
        if(operationName == null)
            return;
        Message outputMessage = null;
        if(operation.getOutput() != null)
            outputMessage = operation.getOutput().resolveMessage(wsdlDocument);
        if(outputMessage != null){
            List allParts = new ArrayList(outputMessage.getParts());
            if(options != null && options.additionalHeaders) {
                List addtionalHeaderParts = wsdlModeler.getAdditionHeaderParts(bindingOperation, outputMessage, false);
                allParts.addAll(addtionalHeaderParts);
            }
            if(allParts.size() > 1)
                build(getOperationName(operationName), allParts);
        }

    }

    private String getCustomizedOperationName(Operation operation) {
        JAXWSBinding jaxwsCustomization = (JAXWSBinding)getExtensionOfType(operation, JAXWSBinding.class);
        String operationName = (jaxwsCustomization != null)?((jaxwsCustomization.getMethodName() != null)?jaxwsCustomization.getMethodName().getName():null):null;
        if(operationName != null){
            if(Names.isJavaReservedWord(operationName)){
                return null;
            }

            return operationName;
        }
        return operation.getName();
    }

    private void writeImports(QName elementName, List parts){
        Set uris = new HashSet();
        for(MessagePart p:parts){
            String ns = p.getDescriptor().getNamespaceURI();
            if(!uris.contains(ns) && !ns.equals("http://www.w3.org/2001/XMLSchema") && !ns.equals(elementName.getNamespaceURI())){
                print("", ns);
                uris.add(ns);
            }
        }
    }

    boolean asyncRespBeanBinding = false;
    private void build(QName elementName, List allParts){

        print(
                "",
                elementName.getNamespaceURI());

        writeImports(elementName, allParts);

        if(!asyncRespBeanBinding){
            print(
                    "" +
                    "  " +
                    "    " +
                    "  " +
                    "",
                    wsdlModeler.getJavaPackage() );
            asyncRespBeanBinding = true;
        }

        print("", elementName.getLocalPart());
        print("");
        print("");


        for(MessagePart p:allParts) {
            //rpclit wsdl:part must reference schema type not element, also it must exclude headers and mime parts
            if(p.getDescriptorKind() == SchemaKinds.XSD_ELEMENT){
                print("",p.getDescriptor().getLocalPart(), p.getDescriptor().getNamespaceURI());
            }else{
                print("",
                    p.getName(),
                    p.getDescriptor().getLocalPart(),
                    p.getDescriptor().getNamespaceURI() );
            }
        }

        print("");
        print("");
        print("");
        print("");

        // reset the StringWriter, so that next operation element could be written
        if(buf.toString().length() > 0){
            //System.out.println("Response bean Schema for operation========> "+ elementName+"\n\n"+buf);
            InputSource is = new InputSource(new StringReader(buf.toString()));
            schemas.add(is);
            buf.getBuffer().setLength(0);
        }
    }

    private QName getOperationName(String operationName){
        if(operationName == null)
            return null;
//        String namespaceURI = wsdlDocument.getDefinitions().getTargetNamespaceURI()+"?"+portType.getName()+"?" + operationName;
        String namespaceURI = "";
        return new QName(namespaceURI, operationName+"Response");
    }

    private void print( String msg ) {
        print( msg, new Object[0] );
    }
    private void print( String msg, Object arg1 ) {
        print( msg, new Object[]{arg1} );
    }
    private void print( String msg, Object arg1, Object arg2 ) {
        print( msg, new Object[]{arg1, arg2} );
    }
    private void print( String msg, Object arg1, Object arg2, Object arg3 ) {
        print( msg, new Object[]{arg1,arg2,arg3} );
    }
    private void print( String msg, Object[] args ) {
        buf.write(MessageFormat.format(msg,args));
        buf.write('\n');
    }

}




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