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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.cxf.tools.corba.processors.idl;

import javax.wsdl.Definition;
import javax.xml.namespace.QName;

import antlr.collections.AST;

import org.apache.cxf.binding.corba.wsdl.Fixed;
import org.apache.ws.commons.schema.XmlSchema;
import org.apache.ws.commons.schema.XmlSchemaFractionDigitsFacet;
import org.apache.ws.commons.schema.XmlSchemaSimpleType;
import org.apache.ws.commons.schema.XmlSchemaSimpleTypeRestriction;
import org.apache.ws.commons.schema.XmlSchemaTotalDigitsFacet;
import org.apache.ws.commons.schema.constants.Constants;

public class FixedVisitor extends VisitorBase {

    private AST identifierNode;

    public FixedVisitor(Scope scope,
                        Definition defn,
                        XmlSchema schemaRef,
                        WSDLASTVisitor wsdlVisitor,
                        AST identifierNodeRef) {
        super(scope, defn, schemaRef, wsdlVisitor);
        identifierNode = identifierNodeRef;
    }

    public static boolean accept(AST node) {
        if (node.getType() == IDLTokenTypes.LITERAL_fixed) {
            return true;
        }
        return false;
    }

    public void visit(AST fixedNode) {
        //      "typedef" 
        //       ::=  
        //       ::= 
        //                    | 
        //       ::= 
        //                           | 
        //                           | 
        //       ::= ... omitted (integer, char, octect, etc)
        //       ::= 
        //                             | 
        //                             | 
        //                             | 
        //       ::= 
        //                           | 
        //                           | 
        //       ::=  {"," }*
        //       ::= 
        //                     | 
        //       ::= 
        //       ::= 
        //       ::=  +
        //       ::= "["  "]"


        AST digitsNode = fixedNode.getFirstChild();
        AST scaleNode = digitsNode.getNextSibling();
        Scope scopedName = new Scope(getScope(), identifierNode);

        // validate digits and scale
        Long digits = new Long(digitsNode.toString());
        Long scale = new Long(scaleNode.toString());
        if (digits < 1 || digits > 31) {
            //throw IllegalIDLException();
            System.out.println("Digits cannot be greater than 31");
            return;
        }
        if (scale.compareTo(digits) > 0) {
            //throw IllegalIDLException();
            System.out.println("Scale cannot be greater than digits");
            return;
        }

        // xmlschema:fixed
        XmlSchemaSimpleType fixedSimpleType = new XmlSchemaSimpleType(schema, true);
        XmlSchemaSimpleTypeRestriction fixedRestriction = new XmlSchemaSimpleTypeRestriction();
        fixedRestriction.setBaseTypeName(Constants.XSD_DECIMAL);
        XmlSchemaTotalDigitsFacet fixedTotalDigits = new XmlSchemaTotalDigitsFacet();
        fixedTotalDigits.setValue(digitsNode.toString());
        XmlSchemaFractionDigitsFacet fixedFractionDigits = new XmlSchemaFractionDigitsFacet();
        fixedFractionDigits.setValue(scaleNode.toString());
        fixedFractionDigits.setFixed(true);
        fixedRestriction.getFacets().add(fixedTotalDigits);
        fixedRestriction.getFacets().add(fixedFractionDigits);
        fixedSimpleType.setName(mapper.mapToQName(scopedName));
        fixedSimpleType.setContent(fixedRestriction);

        // add xmlschema:fixed
        setSchemaType(fixedSimpleType);


        // corba:fixed
        Fixed corbaFixed = new Fixed();
        corbaFixed.setQName(new QName(typeMap.getTargetNamespace(), scopedName.toString()));
        corbaFixed.setDigits(digits);
        corbaFixed.setScale(scale);
        corbaFixed.setRepositoryID(scopedName.toIDLRepositoryID());
        //corbaFixed.setType(Constants.XSD_DECIMAL);
        corbaFixed.setType(fixedSimpleType.getQName());

        // add corba:fixed
        setCorbaType(corbaFixed);
    }
}