daikon.inv.binary.twoSequence
Class PairwiseFloatLessThan

Object
  Invariant
      BinaryInvariant
          TwoSequenceFloat
              PairwiseFloatLessThan

All Implemented Interfaces:

Serializable, Cloneable

public class PairwiseFloatLessThan
extends TwoSequenceFloat

Represents an invariant between corresponding elements of two sequences of double values. The length of the sequences must match for the invariant to hold. A comparison is made over each (x[i], y[i]) pair. Thus, x[0] is compared to y[0], x[1] to y[1], and so forth. Prints as x[] < y[].

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class Invariant

Invariant.ClassVarnameComparator, Invariant.ClassVarnameFormulaComparator, Invariant.InvariantComparatorForPrinting, Invariant.Match

Field Summary

static Logger	debug Debug tracer.
static boolean	dkconfig_enabled Boolean.

Fields inherited from class TwoSequenceFloat

swap

Fields inherited from class Invariant

CONFIDENCE_JUSTIFIED, CONFIDENCE_NEVER, CONFIDENCE_UNJUSTIFIED, debugFlow, debugGuarding, debugIsObvious, debugIsWorthPrinting, debugPrint, debugPrintEquality, dkconfig_confidence_limit, dkconfig_fuzzy_ratio, dkconfig_simplify_define_predicates, falsified, isGuardingPredicate, min_mod_non_missing_samples, ppt, PROBABILITY_JUSTIFIED, PROBABILITY_NEVER, PROBABILITY_UNJUSTIFIED

Constructor Summary

protected	PairwiseFloatLessThan()
protected	PairwiseFloatLessThan(PairwiseFloatGreaterThan swapped_pic)
protected	PairwiseFloatLessThan(PptSlice ppt)

Method Summary

InvariantStatus	add_modified(double[] a1, double[] a2, int count) Default implementation simply calls check.
InvariantStatus	check_modified(double[] a1, double[] a2, int count)
protected double	computeConfidence() This method computes the confidence that this invariant occurred by chance.
boolean	enabled() Returns whether or not this invariant is enabled
static PairwiseFloatLessThan	find(PptSlice ppt)
String	format_daikon()
String	format_esc()
String	format_java_family(OutputFormat format)
String	format_simplify()
String	format_using(OutputFormat format)
NISuppressionSet	get_ni_suppressions() Returns a list of non-instantiating suppressions for this invariant.
static PairwiseFloatLessThan	get_proto() Returns the prototype invariant for PairwiseFloatLessThan
String	getComparator()
protected PairwiseFloatLessThan	instantiate_dyn(PptSlice slice) instantiates the invariant on the specified slice
boolean	instantiate_ok(VarInfo[] vis) PairwiseFloatLessThan is only valid on integral types
boolean	isExclusiveFormula(Invariant other)
DiscardInfo	isObviousDynamically(VarInfo[] vis) Return non-null if this invariant is necessarily true from a fact that can be determined dynamically (after checking data) -- for the given varInfos rather than the varInfos of this.
DiscardInfo	isObviousStatically(VarInfo[] vis) Return true if this invariant is necessarily true from a fact that can be determined statically -- for the given varInfos rather than the varInfos of this.
boolean	isSameFormula(Invariant other) Return true if both invariants are the same class and the order of the variables (swap) is the same.
String	repr() Returns a representation of the class.
protected Invariant	resurrect_done_swapped() Swaps the variables by inverting the state of swap.
static Class<PairwiseFloatGreaterThan>	swap_class() Returns the class that corresponds to this class with its variable order swapped.

Methods inherited from class TwoSequenceFloat

add_unmodified, add, check_unmodified, check, get_swap, resurrect_done_unswapped, resurrect_done, valid_types, var1, var1, var2, var2

Methods inherited from class BinaryInvariant

add_unordered, check_unordered, find, is_symmetric

Methods inherited from class Invariant

add_sample, asInvClass, clear_falsified, clone_and_permute, clone, conf_is_ge, confidence_and, confidence_and, confidence_or, createGuardedInvariant, createGuardingPredicate, enoughSamples, falsify, find, format_too_few_samples, format_unimplemented, format, formatFuzzy, get_comparability, getConfidence, getGuardingList, getGuardingList, hasUninterestingConstant, instantiate, is_false, is_ni_suppressed, isActive, isAllPrestate, isExact, isInteresting, isObvious, isObviousDynamically_SomeInEquality, isObviousDynamically_SomeInEqualityHelper, isObviousDynamically, isObviousStatically_AllInEquality, isObviousStatically_SomeInEquality, isObviousStatically_SomeInEqualityHelper, isObviousStatically, isReflexive, isSameInvariant, isValidEscExpression, isValidExpression, isWorthPrinting, justified, log, log, logDetail, logOn, match, merge, mergeFormulasOk, permute, prob_and, prob_and, prob_is_ge, prob_or, repCheck, repr_prob, resurrect, simplify_format_double, simplify_format_long, simplify_format_string, state_match, toString, toString, transfer, usesVar, usesVar, usesVarDerived, varNames

Methods inherited from class Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

debug

public static final Logger debug

Debug tracer.

dkconfig_enabled

public static boolean dkconfig_enabled

Boolean. True iff PairwiseIntComparison invariants should be considered.

Constructor Detail

PairwiseFloatLessThan

protected PairwiseFloatLessThan(PptSlice ppt)

PairwiseFloatLessThan

protected PairwiseFloatLessThan()

PairwiseFloatLessThan

protected PairwiseFloatLessThan(PairwiseFloatGreaterThan swapped_pic)

Method Detail

get_proto

public static PairwiseFloatLessThan get_proto()

Returns the prototype invariant for PairwiseFloatLessThan

enabled

public boolean enabled()

Returns whether or not this invariant is enabled

Overrides:

enabled in class Invariant

instantiate_ok

public boolean instantiate_ok(VarInfo[] vis)

PairwiseFloatLessThan is only valid on integral types

Overrides:

instantiate_ok in class Invariant

See Also:

Invariant.valid_types(VarInfo[])

instantiate_dyn

protected PairwiseFloatLessThan instantiate_dyn(PptSlice slice)

instantiates the invariant on the specified slice

Overrides:

instantiate_dyn in class Invariant

Returns:

the new invariant

isObviousStatically

public DiscardInfo isObviousStatically(VarInfo[] vis)

Description copied from class: Invariant

Return true if this invariant is necessarily true from a fact that can be determined statically -- for the given varInfos rather than the varInfos of this. Conceptually, this means "is this invariant statically obvious if its VarInfos were switched with vis?" Intended to be overridden by subclasses. Should only do static checking. Precondition: vis.length == this.ppt.var_infos.length

Overrides:

isObviousStatically in class Invariant

Parameters:

vis - The VarInfos this invariant is obvious over. The position and data type of the variables is the *same* as that of this.ppt.var_infos.

isObviousDynamically

public DiscardInfo isObviousDynamically(VarInfo[] vis)

Description copied from class: Invariant

Return non-null if this invariant is necessarily true from a fact that can be determined dynamically (after checking data) -- for the given varInfos rather than the varInfos of this. Conceptually, this means, "Is this invariant dynamically obvious if its VarInfos were switched with vis?" Intended to be overriden by subclasses so they can filter invariants after checking; the overriding method should first call "super.isObviousDynamically(vis)". Since this method is dynamic, it should only be called after all processing.

Overrides:

isObviousDynamically in class Invariant

resurrect_done_swapped

protected Invariant resurrect_done_swapped()

Description copied from class: TwoSequenceFloat

Swaps the variables by inverting the state of swap.

Overrides:

resurrect_done_swapped in class TwoSequenceFloat

swap_class

public static Class<PairwiseFloatGreaterThan> swap_class()

Returns the class that corresponds to this class with its variable order swapped.

repr

public String repr()

Description copied from class: TwoSequenceFloat

Returns a representation of the class. This includes the classname, variables, and swap state.

Overrides:

repr in class TwoSequenceFloat

getComparator

public String getComparator()

format_using

public String format_using(OutputFormat format)

Specified by:

format_using in class Invariant

format_daikon

public String format_daikon()

format_esc

public String format_esc()

format_simplify

public String format_simplify()

format_java_family

public String format_java_family(OutputFormat format)

check_modified

public InvariantStatus check_modified(double[] a1,
                                      double[] a2,
                                      int count)

Specified by:

check_modified in class TwoSequenceFloat

add_modified

public InvariantStatus add_modified(double[] a1,
                                    double[] a2,
                                    int count)

Description copied from class: TwoSequenceFloat

Default implementation simply calls check. Subclasses can override.

Overrides:

add_modified in class TwoSequenceFloat

computeConfidence

protected double computeConfidence()

Description copied from class: Invariant

This method computes the confidence that this invariant occurred by chance. Users should use getConfidence() instead.

Overrides:

computeConfidence in class TwoSequenceFloat

See Also:

Invariant.getConfidence()

isSameFormula

public boolean isSameFormula(Invariant other)

Description copied from class: TwoSequenceFloat

Return true if both invariants are the same class and the order of the variables (swap) is the same.

Overrides:

isSameFormula in class TwoSequenceFloat

Returns:

true iff the two invariants represent the same mathematical formula. Does not consider the context such as variable names, confidences, sample counts, value counts, or related quantities. As a rule of thumb, if two invariants format the same, this method returns true. Furthermore, in many cases, if an invariant does not involve computed constants (as "x>c" and "y=ax+b" do for constants a, b, and c), then this method vacuously returns true.

isExclusiveFormula

public boolean isExclusiveFormula(Invariant other)

Overrides:

isExclusiveFormula in class Invariant

Returns:

true iff the two invariants represent mutually exclusive mathematical formulas -- that is, if one of them is true, then the other must be false. This method does not consider the context such as variable names, confidences, sample counts, value counts, or related quantities.

find

public static PairwiseFloatLessThan find(PptSlice ppt)

get_ni_suppressions

public NISuppressionSet get_ni_suppressions()

Returns a list of non-instantiating suppressions for this invariant.

Overrides:

get_ni_suppressions in class Invariant