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https://issues.apache.org/jira/browse/CAMEL-21428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17897177#comment-17897177
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Oystein Follo edited comment on CAMEL-21428 at 11/11/24 12:39 PM:
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This occurs when calling {{Endpoint.createExchange()}} without setting the
header values for {{CamelFileName}} and {{tempFileName}}, and then passing the
exchange into CamelContext using the producer template
was (Author: JIRAUSER307526):
This occurs when calling {{Endpoint.createExchange()}} without setting the
header values for {{CamelFileName}} and {{{}tempFileName{}}}.
> NullPointerException in createTempFileName due to tempName being null in
> Camel 4.8.0
> ------------------------------------------------------------------------------------
>
> Key: CAMEL-21428
> URL: https://issues.apache.org/jira/browse/CAMEL-21428
> Project: Camel
> Issue Type: Bug
> Components: camel-file
> Affects Versions: 4.8.0, 4.8.1
> Reporter: Oystein Follo
> Priority: Minor
>
> We are experiencing a {{NullPointerException}} within the
> {{createTempFileName}} method. This error occurs when {{tempName}} is
> evaluated as {{{}null{}}}, and later in the code, a call to
> {{tempName.length()}} or {{tempName.lastIndexOf()}} results in an exception.
> This issue can disrupt the file processing flow.
> *Relevant Code Segment:*
> *File: camel-file/components/file/GenericFileProducer.java*
> {code:java}
> public String createTempFileName(Exchange exchange, String fileName) {
> String answer = fileName; String tempName;
> if (exchange.getIn().getHeader(FileConstants.FILE_NAME) == null)
> { exchange.getIn().setHeader(FileConstants.FILE_NAME,
> FileUtil.stripPath(fileName)); tempName =
> endpoint.getTempFileName().evaluate(exchange, String.class);
> exchange.getIn().removeHeader(FileConstants.FILE_NAME); }
> else {
> tempName = endpoint.getTempFileName().evaluate(exchange,
> String.class);
> } int pos = Math.max(answer.lastIndexOf('/'), answer.lastIndexOf("
> "));
> if (pos == -1) {
> answer = tempName;
> } else {
> final String prefix = answer.substring(0, pos + 1);
> StringBuilder sb = new StringBuilder(tempName.length() +
> prefix.length() + 1);
> sb.append(prefix);
> sb.append(tempName);
> answer = sb.toString();
> } if (endpoint.getConfiguration().needToNormalize()) {
> answer = normalizePath(answer);
> } answer = FileUtil.compactPath(answer, getFileSeparator()); return
> answer;
> }
> {code}
> *Issue Location:*
> The issue occurs in the line:
> {code:java}
> StringBuilder sb = new StringBuilder(tempName.length() + prefix.length() + 1);
> {code}
> If {{tempName}} is {{{}null{}}}, calling {{tempName.length()}} or
> {{tempName.lastIndexOf()}} will result in a {{{}NullPointerException{}}}.
> *Steps to Reproduce:*
> # Call {{createTempFileName}} with an {{Exchange}} object where
> {{endpoint.getTempFileName().evaluate(exchange, String.class)}} may return
> {{{}null{}}}.
> # Observe that if {{tempName}} is {{{}null{}}}, a {{NullPointerException}}
> occurs.
> *Expected Behavior:*
> The method should handle the case where {{tempName}} may be {{{}null{}}}. If
> {{tempName}} is {{{}null{}}}, a default value should be used or a check
> should be added to avoid invoking methods on a {{null}} object.
> *Actual Behavior:*
> A {{NullPointerException}} is thrown when {{tempName}} is {{{}null{}}}, which
> may interrupt the file creation or processing flow.
> *Suggested Solution:*
> Add a null check for {{tempName}} after it is assigned. For example:
> {code:java}
> if (tempName == null) {
> tempName = "defaultTempName"; // or handle appropriately for your use case
> }
> {code}
>
> Alternatively, consider handling {{null}} scenarios with a fallback or
> error-handling mechanism to avoid this exception.
> *Impact:*
> This issue disrupts file processing, potentially causing failures in
> downstream applications depending on file operations.
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