[ 
https://issues.apache.org/jira/browse/XMLSCHEMA-13?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Dmitry Repchevsky updated XMLSCHEMA-13:
---------------------------------------

    Description: 
The method uses toString() without checking whether namespace exists for the 
prefix

public String getNamespaceURI(String prefix) {
    return get(prefix).toString();
}

should be:

public String getNamespaceURI(String prefix) {
    Object namespaceURI = get(prefix);
    return namespaceURI == null ? null : namespaceURI .toString();
}

the latter fix would allow a correct behavior for the next code found in 
XmlSchemaSerializer:

            if (ctx != null && ctx.getNamespaceURI(xsdPrefix) != null) {
                xsdPrefix = "xsd";
            }

  was:
The method uses toString() without checking whether namespace exists for the 
prefix

public String getNamespaceURI(String prefix) {
    return get(prefix).toString();
}

should be:

public String getNamespaceURI(String prefix) {
    String namespaceURI = get(prefix);
    return namespaceURI == null ? null : namespaceURI .toString();
}

the latter fix would allow a correct behavior for the next code found in 
XmlSchemaSerializer:

            if (ctx != null && ctx.getNamespaceURI(xsdPrefix) != null) {
                xsdPrefix = "xsd";
            }


> NullPointerException in NamespaceMap.getNamespaceURI() method
> -------------------------------------------------------------
>
>                 Key: XMLSCHEMA-13
>                 URL: https://issues.apache.org/jira/browse/XMLSCHEMA-13
>             Project: XmlSchema
>          Issue Type: Bug
>    Affects Versions: XmlSchema 2.0
>            Reporter: Dmitry Repchevsky
>         Attachments: fnroyOcPjyUAAAAASUVORK5CYII=
>
>   Original Estimate: 1m
>  Remaining Estimate: 1m
>
> The method uses toString() without checking whether namespace exists for the 
> prefix
> public String getNamespaceURI(String prefix) {
>     return get(prefix).toString();
> }
> should be:
> public String getNamespaceURI(String prefix) {
>     Object namespaceURI = get(prefix);
>     return namespaceURI == null ? null : namespaceURI .toString();
> }
> the latter fix would allow a correct behavior for the next code found in 
> XmlSchemaSerializer:
>             if (ctx != null && ctx.getNamespaceURI(xsdPrefix) != null) {
>                 xsdPrefix = "xsd";
>             }

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