org.eclipse.xtext.util.concurrent

Interface IReadAccess<State>

All Known Implementing Classes:

AbstractReadWriteAcces

public interface IReadAccess<State>

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	IReadAccess.Priority<State>

Method Summary

Modifier and Type	Method and Description
<Result> Result	readOnly(IUnitOfWork<Result,State> work) Gets a read-only copy of the State and executes work on it.
default <Result> Result	tryReadOnly(IUnitOfWork<Result,State> work) Tries to get a read-only copy of the State and execute work on it.
default <Result> Result	tryReadOnly(IUnitOfWork<Result,State> work, java.util.function.Supplier<? extends Result> defaultResult) Tries to get a read-only copy of the State and execute work on it.
default <Result> Result	tryReadOnly(IUnitOfWork<Result,State> work, java.util.function.Supplier<? extends Result> defaultResult, java.util.function.Function<? super java.lang.Exception,? extends Result> exceptionHandler) Tries to get a read-only copy of the State and execute work on it.

Method Detail

readOnly

<Result> Result readOnly(IUnitOfWork<Result,State> work)

Gets a read-only copy of the State and executes work on it. WARNING: the State passed to work can be null. e.g. when reading from a read-only zip/jar entry

Parameters:

work - Work to execute on the State

Returns:

The result of executing work

Since:

2.7

tryReadOnly

default <Result> Result tryReadOnly(IUnitOfWork<Result,State> work,
                                    java.util.function.Supplier<? extends Result> defaultResult)

Tries to get a read-only copy of the State and execute work on it.

Parameters:

work - Work to execute on the State

defaultResult - Supplies a result in case the State is null

Returns:

The result of executing work, or the result of querying defaultResult if the State is null

Since:

2.14

tryReadOnly

default <Result> Result tryReadOnly(IUnitOfWork<Result,State> work)

Tries to get a read-only copy of the State and execute work on it.

Parameters:

work - Work to execute on the State

Returns:

The result of executing work, or null if the State is null

Since:

2.15

tryReadOnly

default <Result> Result tryReadOnly(IUnitOfWork<Result,State> work,
                                    java.util.function.Supplier<? extends Result> defaultResult,
                                    java.util.function.Function<? super java.lang.Exception,? extends Result> exceptionHandler)

Tries to get a read-only copy of the State and execute work on it.

Parameters:

work - Work to execute on the State

defaultResult - Supplies a result in case the State is null

exceptionHandler - Supplies a result in case an exception is raised during execution

Returns:

The result of executing work, the result of querying defaultResult if the State is null, or the result of executing exceptionHandler in case an exception is raised

Since:

2.14