Examples of cascading.operation.assertion.AssertExpression

cascading.operation.assertion.AssertExpression
anino.net/">Janino compiler.
Specifically this filter uses the {@link org.codehaus.janino.ExpressionEvaluator}, thus the syntax from that class is inherited here.
An expression may use field names directly as parameters in the expression, or field positions with the syntax "$n", where n is an integer.
Given an argument tuple with the fields "a" and "b", the following expression returns true:
a + b == $0 + $1

Further, the types of the tuple elements will be coerced into the given parameterTypes. Regardless of the actual tuple element values, they will be converted to the types expected by the expression.


    Tap output = getPlatform().getDelimitedFile( Fields.UNKNOWN, true, true, ",", "\"", null, getOutputPath( getTestName() ), SinkMode.REPLACE );


    Pipe lhsPipe = new Pipe( "lhs" );


    lhsPipe = new Each( lhsPipe, new Fields( "date" ), AssertionLevel.STRICT, new AssertExpression( "date instanceof Long", Object.class ) );


    Pipe rhsPipe = new Pipe( "rhs" );


    rhsPipe = new Each( rhsPipe, new Fields( "date" ), new DateParser( new Fields( "date", Long.class ), TestConstants.APACHE_DATE_FORMAT ), Fields.REPLACE );
    rhsPipe = new Each( rhsPipe, new Fields( "date" ), AssertionLevel.STRICT, new AssertExpression( "date instanceof Long", Object.class ) );


    Fields declared = lhsFields.append( Fields.mask( rhsFields, lhsFields ) );


    Pipe pipe = new CoGroup( lhsPipe, new Fields( "date" ), rhsPipe, new Fields( "date" ), declared );

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    Function splitter = new RegexSplitter( new Fields( "num", "char" ).applyTypes( String.class, String.class ), " " );
    pipe = new Each( pipe, new Fields( "line" ), splitter );


    pipe = new Coerce( pipe, new Fields( "num" ).applyTypes( Integer.class ) );


    pipe = new Each( pipe, new Fields( "num" ), AssertionLevel.STRICT, new AssertExpression( "num instanceof Integer", Object.class ) );


    pipe = new Coerce( pipe, new Fields( "num" ).applyTypes( String.class ) );


    pipe = new Each( pipe, new Fields( "num" ), AssertionLevel.STRICT, new AssertExpression( "num instanceof String", Object.class ) );


    Flow flow = getPlatform().getFlowConnector().connect( source, sink, pipe );


    flow.complete();

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    Tap input = getPlatform().getDelimitedFile( fields, true, true, ",", "\"", null, inputFileApacheClean, SinkMode.KEEP );
    Tap output = getPlatform().getDelimitedFile( fields, true, true, ",", "\"", null, getOutputPath( getTestName() ), SinkMode.REPLACE );


    Pipe pipe = new Pipe( "pipe" );


    pipe = new Each( pipe, new Fields( "date" ), AssertionLevel.STRICT, new AssertExpression( "date instanceof Long", Object.class ) );


    Flow flow = getPlatform().getFlowConnector().connect( input, output, pipe );


    flow.complete();

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Related Classes of cascading.operation.assertion.AssertExpression

cascading.pipe.assembly.AssemblyHelpersPlatformTest

cascading.scheme.TextDelimitedPlatformTest

cascading.tuple.TupleEntry

cascading.TypedFieldedPipesPlatformTest

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