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 br

    In this representation of Java bytecode references to a Java class file's constant pool and to attributes are replaced by direct references to the corresponding constant pool entries.

    In this representation of Java bytecode references to a Java class file's constant pool and to attributes are replaced by direct references to the corresponding constant pool entries. This facilitates developing analyses and fosters comprehension.

    Based on the fact that indirect references to constant pool entries are resolved and replaced by direct references this representation is called the resolved representation.

    This representation of Java bytecode is considered as OPAL's standard representation for writing Scala based analyses. This representation is engineered such that it facilitates writing analyses that use pattern matching.

    Definition Classes
    opalj
  • package analyses

    Defines commonly useful type aliases.

    Defines commonly useful type aliases.

    Definition Classes
    br
  • package cg
    Definition Classes
    analyses
  • AbstractClassExtensibility
  • AllEntryPointsFinder
  • AllInstantiatedTypesFinder
  • AllPackagesClosed
  • ApplicationEntryPointsFinder
  • ApplicationInstantiatedTypesFinder
  • ApplicationWithoutJREEntryPointsFinder
  • CallBySignatureKey
  • CallBySignatureTargets
  • ClassExtensibility
  • ClassExtensibilityKey
  • ClassHierarchyIsNotExtensible
  • ClosedPackages
  • ClosedPackagesConfiguration
  • ClosedPackagesKey
  • ConfigurationEntryPointsFinder
  • ConfigurationInstantiatedTypesFinder
  • ConfiguredExtensibleClasses
  • ConfiguredFinalClasses
  • DefaultClassExtensibility
  • EntryPointFinder
  • InitialEntryPointsKey
  • InitialInstantiatedTypesKey
  • InstantiatedTypesFinder
  • IsOverridableMethodKey
  • LibraryEntryPointsFinder
  • LibraryInstantiatedTypesFinder
  • MetaEntryPointsFinder
  • OpenCodeBase
  • TypeExtensibilityAnalysis
  • TypeExtensibilityKey
o

org.opalj.br.analyses.cg

IsOverridableMethodKey

object IsOverridableMethodKey extends ProjectInformationKey[(Method) => Answer, Nothing]

The key object to get a function that determines whether a method can be overridden by a not yet existing type. A method can be overridden if it's declaring type _dt_is extensible by an (unknown) type _ut_ (e.g., when the analysis assumes an open world) and if the method is not overridden by another subtype _s_ such that _ut <: s <: st_ and if the method can be overridden according to the JVM's semantics.

Source
IsOverridableMethodKey.scala
Linear Supertypes
ProjectInformationKey[(Method) => Answer, Nothing], AnyRef, Any
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Inherited
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  2. ProjectInformationKey
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Visibility
  1. Public
  2. Protected

Value Members

  1. def compute(project: SomeProject): (Method) => Answer

    Computes the information for the given project.

    Computes the information for the given project.

    Definition Classes
    IsOverridableMethodKey → ProjectInformationKey
    Note

    Classes that inherit from this trait are not expected to make this method public. This method is only expected to be called by an instance of a Project.

  2. def requirements(project: SomeProject): ProjectInformationKeys

    The IsOverridableMethodKey has the TypeExtensibilityKey as prerequisite.

    The IsOverridableMethodKey has the TypeExtensibilityKey as prerequisite.

    returns

    Seq(TypeExtensibilityKey).

    Definition Classes
    IsOverridableMethodKey → ProjectInformationKey
  3. final val uniqueId: Int

    The unique id of this key.

    The unique id of this key. The key is used to enable efficient access and is automatically assigned by OPAL and will not change after that.

    Definition Classes
    ProjectInformationKey