diff options
Diffstat (limited to 'searchlib/src/main/java/com/yahoo/searchlib/rankingexpression/transform/Simplifier.java')
| -rw-r--r-- | searchlib/src/main/java/com/yahoo/searchlib/rankingexpression/transform/Simplifier.java | 40 |
1 files changed, 19 insertions, 21 deletions
diff --git a/searchlib/src/main/java/com/yahoo/searchlib/rankingexpression/transform/Simplifier.java b/searchlib/src/main/java/com/yahoo/searchlib/rankingexpression/transform/Simplifier.java index 90861e64164..1c1f7509ce8 100644 --- a/searchlib/src/main/java/com/yahoo/searchlib/rankingexpression/transform/Simplifier.java +++ b/searchlib/src/main/java/com/yahoo/searchlib/rankingexpression/transform/Simplifier.java @@ -4,9 +4,8 @@ package com.yahoo.searchlib.rankingexpression.transform; import com.yahoo.searchlib.rankingexpression.evaluation.DoubleCompatibleValue; import com.yahoo.searchlib.rankingexpression.evaluation.DoubleValue; import com.yahoo.searchlib.rankingexpression.evaluation.Value; -import com.yahoo.searchlib.rankingexpression.rule.ArithmeticNode; -import com.yahoo.searchlib.rankingexpression.rule.ArithmeticOperator; -import com.yahoo.searchlib.rankingexpression.rule.ComparisonNode; +import com.yahoo.searchlib.rankingexpression.rule.OperationNode; +import com.yahoo.searchlib.rankingexpression.rule.Operator; import com.yahoo.searchlib.rankingexpression.rule.CompositeNode; import com.yahoo.searchlib.rankingexpression.rule.ConstantNode; import com.yahoo.searchlib.rankingexpression.rule.EmbracedNode; @@ -34,8 +33,8 @@ public class Simplifier extends ExpressionTransformer<TransformContext> { node = transformIf((IfNode) node); if (node instanceof EmbracedNode e && hasSingleUndividableChild(e)) node = e.children().get(0); - if (node instanceof ArithmeticNode) - node = transformArithmetic((ArithmeticNode) node); + if (node instanceof OperationNode) + node = transformArithmetic((OperationNode) node); if (node instanceof NegativeNode) node = transformNegativeNode((NegativeNode) node); return node; @@ -43,19 +42,18 @@ public class Simplifier extends ExpressionTransformer<TransformContext> { private boolean hasSingleUndividableChild(EmbracedNode node) { if (node.children().size() > 1) return false; - if (node.children().get(0) instanceof ArithmeticNode) return false; - if (node.children().get(0) instanceof ComparisonNode) return false; + if (node.children().get(0) instanceof OperationNode) return false; return true; } - private ExpressionNode transformArithmetic(ArithmeticNode node) { + private ExpressionNode transformArithmetic(OperationNode node) { // Fold the subset of expressions that are constant (such that in "1 + 2 + var") if (node.children().size() > 1) { List<ExpressionNode> children = new ArrayList<>(node.children()); - List<ArithmeticOperator> operators = new ArrayList<>(node.operators()); - for (ArithmeticOperator operator : ArithmeticOperator.operatorsByPrecedence) + List<Operator> operators = new ArrayList<>(node.operators()); + for (Operator operator : Operator.operatorsByPrecedence) transform(operator, children, operators); - node = new ArithmeticNode(children, operators); + node = new OperationNode(children, operators); } if (isConstant(node) && ! node.evaluate(null).isNaN()) @@ -66,8 +64,8 @@ public class Simplifier extends ExpressionTransformer<TransformContext> { return node; } - private void transform(ArithmeticOperator operatorToTransform, - List<ExpressionNode> children, List<ArithmeticOperator> operators) { + private void transform(Operator operatorToTransform, + List<ExpressionNode> children, List<Operator> operators) { int i = 0; while (i < children.size()-1) { boolean transformed = false; @@ -75,7 +73,7 @@ public class Simplifier extends ExpressionTransformer<TransformContext> { ExpressionNode child1 = children.get(i); ExpressionNode child2 = children.get(i + 1); if (isConstant(child1) && isConstant(child2) && hasPrecedence(operators, i)) { - Value evaluated = new ArithmeticNode(child1, operators.get(i), child2).evaluate(null); + Value evaluated = new OperationNode(child1, operators.get(i), child2).evaluate(null); if ( ! evaluated.isNaN()) { // Don't replace by NaN operators.remove(i); children.set(i, new ConstantNode(evaluated.freeze())); @@ -94,7 +92,7 @@ public class Simplifier extends ExpressionTransformer<TransformContext> { * This check works because we simplify by decreasing precedence, so neighbours will either be single constant values * or a more complex expression that can't be simplified and hence also prevents the simplification in question here. */ - private boolean hasPrecedence(List<ArithmeticOperator> operators, int i) { + private boolean hasPrecedence(List<Operator> operators, int i) { if (i > 0 && operators.get(i-1).hasPrecedenceOver(operators.get(i))) return false; if (i < operators.size()-1 && operators.get(i+1).hasPrecedenceOver(operators.get(i))) return false; return true; @@ -116,14 +114,14 @@ public class Simplifier extends ExpressionTransformer<TransformContext> { return new ConstantNode(constant.getValue().negate() ); } - private boolean allMultiplicationOrDivision(ArithmeticNode node) { - for (ArithmeticOperator o : node.operators()) - if (o != ArithmeticOperator.MULTIPLY && o != ArithmeticOperator.DIVIDE) + private boolean allMultiplicationOrDivision(OperationNode node) { + for (Operator o : node.operators()) + if (o != Operator.multiply && o != Operator.divide) return false; return true; } - private boolean hasZero(ArithmeticNode node) { + private boolean hasZero(OperationNode node) { for (ExpressionNode child : node.children()) { if (isZero(child)) return true; @@ -131,9 +129,9 @@ public class Simplifier extends ExpressionTransformer<TransformContext> { return false; } - private boolean hasDivisionByZero(ArithmeticNode node) { + private boolean hasDivisionByZero(OperationNode node) { for (int i = 1; i < node.children().size(); i++) { - if ( node.operators().get(i - 1) == ArithmeticOperator.DIVIDE && isZero(node.children().get(i))) + if (node.operators().get(i - 1) == Operator.divide && isZero(node.children().get(i))) return true; } return false; |