Package org.apache.yoko.tools.processors.idl

Source Code of org.apache.yoko.tools.processors.idl.TypedefVisitor

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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,
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* specific language governing permissions and limitations
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*/

package org.apache.yoko.tools.processors.idl;

import javax.xml.namespace.QName;

import antlr.collections.AST;

import org.apache.schemas.yoko.bindings.corba.Alias;
import org.apache.schemas.yoko.bindings.corba.TypeMappingType;

import org.apache.ws.commons.schema.XmlSchema;
import org.apache.ws.commons.schema.XmlSchemaCollection;
import org.apache.ws.commons.schema.XmlSchemaSimpleType;
import org.apache.ws.commons.schema.XmlSchemaSimpleTypeRestriction;
import org.apache.ws.commons.schema.XmlSchemaType;
import org.apache.ws.commons.schema.constants.Constants;

import org.apache.yoko.wsdl.CorbaConstants;
import org.apache.yoko.wsdl.CorbaTypeImpl;

public class TypedefVisitor extends VisitorBase {
   
    public TypedefVisitor(Scope scope,
                          XmlSchemaCollection xmlSchemas,
                          XmlSchema xmlSchema,
                          TypeMappingType typeMappingType) {
        super(scope, xmlSchemas, xmlSchema, typeMappingType);
    }
   
    public static boolean accept(AST node) {
        if (node.getType() == IDLTokenTypes.LITERAL_typedef) {
            return true;
        }
        return false;
    }
   
    public void visit(AST typedefNode) {
        // "typedef" <type_declarator>
        // <type_declarator> ::= <type_spec> <declarators>

        AST typeDeclaratorNode = typedefNode.getFirstChild();
        AST identifierNode = TypesUtils.getCorbaTypeNameNode(typeDeclaratorNode);
       
        TypesVisitor typesVisitor = new TypesVisitor(getScope(), schemas, schema, typeMap, identifierNode);
        typesVisitor.visit(typeDeclaratorNode);

        XmlSchemaType schemaType = typesVisitor.getSchemaType();
        CorbaTypeImpl corbaType = typesVisitor.getCorbaType();
       
        Scope typedefScope = new Scope(getScope(), identifierNode);
       
        if (SequenceVisitor.accept(typeDeclaratorNode)
            || FixedVisitor.accept(typeDeclaratorNode)) {
            // Handle cases "typedef sequence"
            //              "typedef fixed"
            DeclaratorVisitor declaratorVisitor = new DeclaratorVisitor(typedefScope,
                                                                        schemas,
                                                                        schema,
                                                                        typeMap,
                                                                        schemaType,
                                                                        corbaType);
            declaratorVisitor.visit(identifierNode);

        } else if (StringVisitor.accept(typeDeclaratorNode)) {
            // Handle cases "typedef string"
            //              "typedef wstring"

            if (StringVisitor.isBounded(typeDeclaratorNode)) {
                DeclaratorVisitor declaratorVisitor = new DeclaratorVisitor(typedefScope,
                                                                            schemas,
                                                                            schema,
                                                                            typeMap,
                                                                            schemaType,
                                                                            corbaType);
                declaratorVisitor.visit(identifierNode);
 
            } else {
                // unbounded string type is already in the XmlSchema and only needs to be added
                // to the CorbaTypeMap, therefore we cannot use DeclaratorVisitor here.
               
                while (identifierNode != null) {
                    Alias corbaString = new Alias();
                    if (typeDeclaratorNode.getType() == IDLTokenTypes.LITERAL_string) {
                        corbaString.setBasetype(CorbaConstants.NT_CORBA_STRING);
                    } else if (typeDeclaratorNode.getType() == IDLTokenTypes.LITERAL_wstring) {
                        corbaString.setBasetype(CorbaConstants.NT_CORBA_WSTRING);
                    } else {
                        // should never get here
                        throw new RuntimeException("[TypedefVisitor] Attempted to visit an invalid node: "
                                                   + typeDeclaratorNode.toString());
                    }
                    Scope newScope = new Scope(typedefScope.getParent(), identifierNode);
                    corbaString.setQName(new QName(typeMap.getTargetNamespace(), newScope.toString()));
                    corbaString.setType(Constants.XSD_STRING);
                    corbaString.setRepositoryID(newScope.toIDLRepositoryID());

                    typeMap.getStructOrExceptionOrUnion().add(corbaString);

                    identifierNode = identifierNode.getNextSibling();
                }
            }

        } else {
            // typedef used to define an alias
           
            // if declaring an array, do not generate aliases
            if (!ArrayVisitor.accept(identifierNode)) {
                generateAlias(identifierNode,
                              schemaType,
                              corbaType);

                schemaType = getSchemaType();
                corbaType = getCorbaType();
            }
           
            DeclaratorVisitor declaratorVisitor = new DeclaratorVisitor(typedefScope,
                                                                        schemas,
                                                                        schema,
                                                                        typeMap,
                                                                        schemaType,
                                                                        corbaType);
            declaratorVisitor.visit(identifierNode);
       
        }


        setSchemaType(schemaType);
        setCorbaType(corbaType);
    }
   
    private void generateAlias(AST identifierNode,
                               XmlSchemaType schemaType,
                               CorbaTypeImpl corbaType) {
        // xmlschema:simpleType
        XmlSchemaSimpleType simpleType = new XmlSchemaSimpleType(schema);
        Scope scopedName = new Scope(getScope(), identifierNode);
        simpleType.setName(scopedName.toString());
        XmlSchemaSimpleTypeRestriction restriction = new XmlSchemaSimpleTypeRestriction();
        restriction.setBaseTypeName(schemaType.getQName());
        simpleType.setContent(restriction);
       
        // add xmlschema:simpleType
        setSchemaType(simpleType);

       
        // corba:alias
        Alias alias = new Alias();
        alias.setQName(new QName(typeMap.getTargetNamespace(), scopedName.toString()));
        alias.setBasetype(corbaType.getQName());
        alias.setType(schemaType.getQName());
        alias.setRepositoryID(scopedName.toIDLRepositoryID());
       
        // add corba:alias
        setCorbaType(alias);
    }
}
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