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EngineCallBacksDefault.errorCallBack - the default implementation of errorCallBack
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Calling Sequence
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void errorCallBack( Object data, int offset, String msg ) throws MapleException
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Parameters
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data
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-
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arbitrary data that was passed into the Engine constructor
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offset
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-
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type of error
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msg
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-
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text of the error message
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Description
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•
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This default implementation converts the errors to exceptions and throws MapleExceptions objects. These exceptions are then thrown from the Java OpenMaple call that was executing when the error occurred.
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Examples
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import com.maplesoft.openmaple.*;
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import com.maplesoft.externalcall.MapleException;
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class Example
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{
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public static void main( String notused[] ) throws MapleException
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{
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String mapleArgs[];
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Engine engine;
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mapleArgs = new String[1];
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mapleArgs[0] = "java";
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engine = new Engine( mapleArgs, new EngineCallBacksDefault(),
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null, null );
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try
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{
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engine.evaluate( "1+" );
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}
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catch ( MapleException me )
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{
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System.out.println( me.getMessage() );
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}
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try
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{
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engine.evaluate( "int(x);" );
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}
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catch ( MapleException me )
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{
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System.out.println( me.getMessage() );
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}
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try
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{
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engine.evaluate( "a := a+1;" );
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}
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catch ( MapleException me )
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{
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System.out.println( me.getMessage() );
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}
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}
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}
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Executing this code produces the following output.
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at offset 3, unexpected end of statement
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Error, (in int) wrong number (or type) of arguments
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Error, recursive assignment
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