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Engine.stop - shutdown the kernel
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Calling Sequence
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void stop() throws MapleException
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Description
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The stop method shuts down the Maple session represented by the Engine object.
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Any Algebraic objects will have their dispose method called. These objects can no longer be used to reference the values they represented before stop was called.
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Even after stopping the current Engine object, new Engine objects cannot be created.
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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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Numeric n;
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List l;
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RTable r;
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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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n = engine.newNumeric( 1000 );
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l = (List)engine.evaluate( "[1,2,3,4]:" );
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r = (RTable)engine.evaluate( "Array( 1..10, 1..10 ):" );
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System.out.println( n.isDisposed() );
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System.out.println( l.isDisposed() );
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System.out.println( r.isDisposed() );
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engine.stop();
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System.out.println( n.isDisposed() );
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System.out.println( l.isDisposed() );
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System.out.println( r.isDisposed() );
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try
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{
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engine.evaluate( "1+1;" );
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}
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catch ( MapleException me )
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{
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System.out.println( "Error: "+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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false
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false
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false
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true
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true
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true
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Download Help Document
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