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Handling exceptions thrown by a Java method called from a Mosel model Description Demonstrates how a Mosel model can handle exceptions thrown by Java methods. The Java class exports a method 'readFileToString' which takes a pathname and returns its content as a Java String. The Mosel model attempts to call this method, passing it the filename of a file that does not exist. Java will throw a FileNotFoundException; the Mosel model checks for the error and outputs a message to the output stream.
You must compile the Java file before running the example - e.g. javac FileUtils.java
Source Files By clicking on a file name, a preview is opened at the bottom of this page.
FileUtils.java
/**
* Example Java class, defining file-related utility functions
*
* @author J.Farmer, (c) Fair Isaac Corporation, 2016
**/
import java.io.*;
public class FileUtils {
/**
* Given a file path, read the file content into a string
**/
public static String readFileToString(String path) throws IOException {
StringWriter result = new StringWriter();
try (Reader in = new BufferedReader(new FileReader(path))) {
int c;
while ((c=in.read())!=-1) {
result.write(c);
}
}
return result.toString();
}
}
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