Packages

  • package root
    Definition Classes
    root
  • package org
    Definition Classes
    root
  • package opalj

    OPAL is a Scala-based framework for the static analysis, manipulation and creation of Java bytecode.

    OPAL is a Scala-based framework for the static analysis, manipulation and creation of Java bytecode. OPAL is designed with performance, scalability and adaptability in mind.

    Its main components are:

    • a library (Common) which provides generally useful data-structures and algorithms for static analyses.
    • a framework for implementing lattice based static analyses (Static Analysis Infrastructure)
    • a framework for parsing Java bytecode (Bytecode Infrastructure) that can be used to create arbitrary representations.
    • a library to create a one-to-one in-memory representation of Java bytecode (Bytecode Disassembler).
    • a library to create a representation of Java bytecode that facilitates writing simple static analyses (Bytecode Representation - org.opalj.br).
    • a scalable, easily customizable framework for the abstract interpretation of Java bytecode (Abstract Interpretation Framework - org.opalj.ai).
    • a library to extract dependencies between code elements and to facilitate checking architecture definitions.
    • a library for the lightweight manipulation and creation of Java bytecode (Bytecode Assembler).

    General Design Decisions

    Thread Safety

    Unless explicitly noted, OPAL is thread safe. I.e., the classes defined by OPAL can be considered to be thread safe unless otherwise stated. (For example, it is possible to read and process class files concurrently without explicit synchronization on the client side.)

    No null Values

    Unless explicitly noted, OPAL does not null values I.e., fields that are accessible will never contain null values and methods will never return null. If a method accepts null as a value for a parameter or returns a null value it is always explicitly documented. In general, the behavior of methods that are passed null values is undefined unless explicitly documented.

    No Typecasts for Collections

    For efficiency reasons, OPAL sometimes uses mutable data-structures internally. After construction time, these data-structures are generally represented using their generic interfaces (e.g., scala.collection.{Set,Map}). However, a downcast (e.g., to add/remove elements) is always forbidden as it would effectively prevent thread-safety.

    Assertions

    OPAL makes heavy use of Scala's Assertion Facility to facilitate writing correct code. Hence, for production builds (after thorough testing(!)) it is highly recommend to build OPAL again using -Xdisable-assertions.

    Definition Classes
    org
  • package collection

    OPAL's collection library is primarily designed with high performance in mind.

    Design Goals

    OPAL's collection library is primarily designed with high performance in mind. I.e., all methods provided by the collection library are reasonably optimized. However, providing a very large number of methods is a non-goal. Overall, OPAL's collection library provides:

    • collection classes that are manually specialized for primitive data-types.
    • collection classes that are optimized for particularly small collections of values.
    • collection classes that target special use cases such as using a collection as a workset/worklist.
    • collection classes that offer special methods that minimize the number of steps when compared to general purpose methods.

    Integration With Scala's Collection Library

    Hence, OPAL's collection library complements Scala's default collection library and is not intended to replace it. Integration with Scala's collection library is primarily provided by means of iterators (OPAL's Iterators inherit from Scala's Iterators). Furthermore the companion object of each of OPAL's collection classes generally provides factory methods that facilitate the conversion from Scala collection classes to OPAL collection classes.

    Status

    The collection library is growing. Nevertheless, the existing classes are production ready.

    Definition Classes
    opalj
  • package concurrent

    Common constants, factory methods and objects used throughout OPAL when performing concurrent computations.

    Common constants, factory methods and objects used throughout OPAL when performing concurrent computations.

    Definition Classes
    opalj
  • package constraints

    Defines helper values and methods related to modeling constraints.

    Defines helper values and methods related to modeling constraints.

    Definition Classes
    opalj
  • package control

    Defines common control abstractions.

    Defines common control abstractions.

    Definition Classes
    opalj
  • package graphs

    This package defines graph algorithms as well as factory methods to describe and compute graphs and trees.

    This package defines graph algorithms as well as factory methods to describe and compute graphs and trees.

    This package supports the following types of graphs:

    1. graphs based on explicitly connected nodes (org.opalj.graphs.Node),
    2. graphs where the relationship between the nodes are encoded externally (org.opalj.graphs.Graph).
    Definition Classes
    opalj
  • package io

    Various io-related helper methods and classes.

    Various io-related helper methods and classes.

    Definition Classes
    opalj
    Note

    The implementations of the methods rely on Java NIO(2).

  • package log
    Definition Classes
    opalj
  • package util

    Utility methods.

    Utility methods.

    Definition Classes
    opalj
  • Answer
  • BinaryArithmeticOperators
  • Empty
  • Failure
  • No
  • NoResult
  • ProjectType
  • ProjectTypes
  • RelationalOperators
  • Result
  • Success
  • UByte
  • UShort
  • UnaryArithmeticOperators
  • Unknown
  • Yes
o

org.opalj

Unknown

object Unknown extends Answer with Product with Serializable

Represents the answer to a question where the answer is either Unknown or is actually both; that is, Yes and No.

Linear Supertypes
Serializable, Serializable, Product, Equals, Answer, AnyRef, Any
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. Unknown
  2. Serializable
  3. Serializable
  4. Product
  5. Equals
  6. Answer
  7. AnyRef
  8. Any
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Visibility
  1. Public
  2. All

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. def &&(other: Answer): Answer

    The logical conjunction of this answer and the given answer.

    The logical conjunction of this answer and the given answer. In this case Unknown is considered to either represent the answer Yes or No; hence, this && other is treated as this && (Yes || No).

    Definition Classes
    Unknown → Answer
  4. final def &&(other: Boolean): Answer
    Definition Classes
    Answer
  5. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  8. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  9. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  10. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  11. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  12. def ifUnknown(f: ⇒ Answer): Answer

    If this answer is unknown the given function is evaluated and that result is returned, otherwise this answer is returned.

    If this answer is unknown the given function is evaluated and that result is returned, otherwise this answer is returned.

    Definition Classes
    Unknown → Answer
  13. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  14. def isNo: Boolean

    Returns true if and only if this answer is No.

    Returns true if and only if this answer is No.

    Effectively the same as a comparison with No.

    Definition Classes
    Unknown → Answer
  15. final def isNoOrUnknown: Boolean

    Returns true if this answer is No or Unknown, false otherwise.

    Returns true if this answer is No or Unknown, false otherwise.

    Definition Classes
    Answer
  16. def isNotNo: Boolean

    Returns true if this answer is Yes or Unknown, false otherwise.

    Returns true if this answer is Yes or Unknown, false otherwise.

    Definition Classes
    Unknown → Answer
  17. def isNotYes: Boolean

    Returns true if this answer is No or Unknown, false otherwise.

    Returns true if this answer is No or Unknown, false otherwise.

    Definition Classes
    Unknown → Answer
  18. def isUnknown: Boolean

    Returns true if and only if this answer is Unknown.

    Returns true if and only if this answer is Unknown.

    Effectively the same as a comparison with Unknown.

    Definition Classes
    Unknown → Answer
  19. def isYes: Boolean

    Returns true if and only if this answer is Yes.

    Returns true if and only if this answer is Yes.

    Effectively the same as a comparison with Yes.

    Definition Classes
    Unknown → Answer
  20. def isYesOrNo: Boolean

    Returns true if this answer is either Yes or No; false if this answer is Unknown.

    Returns true if this answer is either Yes or No; false if this answer is Unknown.

    Definition Classes
    Unknown → Answer
  21. final def isYesOrUnknown: Boolean

    Returns true if this answer is Yes or Unknown, false otherwise.

    Returns true if this answer is Yes or Unknown, false otherwise.

    Definition Classes
    Answer
  22. def join(other: Answer): Unknown.type

    Joins this answer and the given answer.

    Joins this answer and the given answer. In this case Unknown will represent the case that we have both answers; that is we have a set based view w.r.t. Answers. Hence, this join Unknown is considered as this join {Yes, No} where the set {Yes, No} is represented by Unknown.

    If the other Answer is identical to this answer this is returned, otherwise Unknown is returned.

    Definition Classes
    Unknown → Answer
  23. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  24. def negate: Unknown.type

    The negation of this Answer.

    The negation of this Answer. If the answer is Unknown the negation is still Unknown.

    Definition Classes
    Unknown → Answer
  25. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  26. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  27. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  28. final def unary_!: Answer

    Definition Classes
    Answer
    See also

    Answer#negate

  29. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  30. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  31. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  32. def ||(other: Answer): Answer

    The logical disjunction of this answer and the given answer.

    The logical disjunction of this answer and the given answer. In this case Unknown is considered to either represent the answer Yes or No; hence, this || other is treated as this || (Yes || No).

    Definition Classes
    Unknown → Answer
  33. final def ||(other: Boolean): Answer
    Definition Classes
    Answer

Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from Answer

Inherited from AnyRef

Inherited from Any

Ungrouped