use of org.apache.atlas.groovy.FieldExpression in project incubator-atlas by apache.
the class Gremlin2ExpressionFactory method typeTestExpression.
@Override
public GroovyExpression typeTestExpression(GraphPersistenceStrategies s, String typeName, GroovyExpression itRef) {
GroovyExpression superTypeAttrExpr = new FieldExpression(itRef, s.superTypeAttributeName());
GroovyExpression typeNameExpr = new LiteralExpression(typeName);
GroovyExpression isSuperTypeExpr = new FunctionCallExpression(superTypeAttrExpr, CONTAINS, typeNameExpr);
GroovyExpression superTypeMatchesExpr = new TernaryOperatorExpression(superTypeAttrExpr, isSuperTypeExpr, LiteralExpression.FALSE);
GroovyExpression typeAttrExpr = new FieldExpression(itRef, s.typeAttributeName());
GroovyExpression typeMatchesExpr = new ComparisonExpression(typeAttrExpr, ComparisonOperator.EQUALS, typeNameExpr);
return new LogicalExpression(typeMatchesExpr, LogicalOperator.OR, superTypeMatchesExpr);
}
use of org.apache.atlas.groovy.FieldExpression in project incubator-atlas by apache.
the class Gremlin2ExpressionFactory method getOrderFieldParents.
@Override
public List<GroovyExpression> getOrderFieldParents() {
GroovyExpression itExpr = getItVariable();
List<GroovyExpression> result = new ArrayList<>(2);
result.add(new FieldExpression(itExpr, "a"));
result.add(new FieldExpression(itExpr, "b"));
return result;
}
use of org.apache.atlas.groovy.FieldExpression in project incubator-atlas by apache.
the class Gremlin2ExpressionFactory method generateLikeExpressionUsingFilter.
@Override
public GroovyExpression generateLikeExpressionUsingFilter(GroovyExpression parent, String propertyName, GroovyExpression propertyValue) throws AtlasException {
GroovyExpression itExpr = getItVariable();
GroovyExpression nameExpr = new FieldExpression(itExpr, propertyName);
GroovyExpression matchesExpr = new FunctionCallExpression(nameExpr, MATCHES, escapePropertyValue(propertyValue));
GroovyExpression closureExpr = new ClosureExpression(matchesExpr);
GroovyExpression filterExpr = new FunctionCallExpression(parent, FILTER_METHOD, closureExpr);
return filterExpr;
}
use of org.apache.atlas.groovy.FieldExpression in project incubator-atlas by apache.
the class Gremlin2ExpressionFactory method generateLoopExpression.
@Override
public GroovyExpression generateLoopExpression(GroovyExpression parent, GraphPersistenceStrategies s, IDataType dataType, GroovyExpression loopExpr, String alias, Integer times) {
GroovyExpression emitExpr = generateLoopEmitExpression(s, dataType);
//note that in Gremlin 2 (unlike Gremlin 3), the parent is not explicitly used. It is incorporated
//in the loopExpr.
GroovyExpression whileFunction = null;
if (times != null) {
GroovyExpression loopsExpr = new FieldExpression(getItVariable(), LOOP_COUNT_FIELD);
GroovyExpression timesExpr = new LiteralExpression(times);
whileFunction = new ClosureExpression(new ComparisonExpression(loopsExpr, ComparisonOperator.LESS_THAN, timesExpr));
} else {
GroovyExpression pathExpr = new FieldExpression(getItVariable(), PATH_FIELD);
GroovyExpression itObjectExpr = getCurrentObjectExpression();
GroovyExpression pathContainsExpr = new FunctionCallExpression(pathExpr, CONTAINS, itObjectExpr);
whileFunction = new ClosureExpression(new TernaryOperatorExpression(pathContainsExpr, LiteralExpression.FALSE, LiteralExpression.TRUE));
}
GroovyExpression emitFunction = new ClosureExpression(emitExpr);
GroovyExpression loopCall = new FunctionCallExpression(TraversalStepType.BRANCH, loopExpr, LOOP_METHOD, new LiteralExpression(alias), whileFunction, emitFunction);
return new FunctionCallExpression(TraversalStepType.SIDE_EFFECT, loopCall, ENABLE_PATH_METHOD);
}
use of org.apache.atlas.groovy.FieldExpression in project incubator-atlas by apache.
the class Gremlin3ExpressionFactory method generateLikeExpressionUsingFilter.
@Override
public GroovyExpression generateLikeExpressionUsingFilter(GroovyExpression parent, String propertyName, GroovyExpression propertyValue) throws AtlasException {
GroovyExpression itExpr = getItVariable();
GroovyExpression nameExpr = new FieldExpression(itExpr, propertyName);
GroovyExpression matchesExpr = new FunctionCallExpression(nameExpr, MATCHES, escapePropertyValue(propertyValue));
GroovyExpression closureExpr = new ClosureExpression(matchesExpr);
GroovyExpression filterExpr = new FunctionCallExpression(parent, FILTER_METHOD, closureExpr);
return filterExpr;
}
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