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 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
  • ConcurrentExceptions
  • ConcurrentTasks
  • Locking
  • OPALThreadPoolExecutor
  • SequentialTasks
  • Tasks

object Locking

Defines several convenience methods related to using (Reentrant(ReadWrite))Locks.

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  17. final def tryWithReadLock[B](rwLock: ReentrantReadWriteLock)(f: ⇒ B): Option[B]

    Tries to acquire the read lock and then executes the function f; if the read lock cannot be acquired the given function f is not executed and None is returned.

    Tries to acquire the read lock and then executes the function f; if the read lock cannot be acquired the given function f is not executed and None is returned.

    If lock was acquired, it will always be released before the method returns.

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  21. final def withLock[B](lock: ReentrantLock)(f: ⇒ B): B

    Acquires the lock and then executes the function f.

    Acquires the lock and then executes the function f. Before returning the lock is always released.

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  22. final def withReadLock[B](rwLock: ReentrantReadWriteLock)(f: ⇒ B): B

    Acquires the read lock and then executes the function f.

    Acquires the read lock and then executes the function f. Before returning the lock is always released.

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  23. final def withWriteLock[B](rwLock: ReentrantReadWriteLock)(f: ⇒ B): B

    Acquires the write lock associated with this instance and then executes the function f.

    Acquires the write lock associated with this instance and then executes the function f. Afterwards, the lock is released.

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  24. final def withWriteLocks[T](rwLocks: TraversableOnce[ReentrantReadWriteLock])(f: ⇒ T): T

    Acquires all given locks in the given order and then executes the given function f.

    Acquires all given locks in the given order and then executes the given function f. Afterwards all locks are released in reverse order.

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