Module com.github.akurilov.commons

Package com.github.akurilov.commons.io.el

Class ExpressionInputImpl<T>

java.lang.Object

com.github.akurilov.commons.io.el.ExpressionInputImpl<T>

All Implemented Interfaces:

ExpressionInput<T>, Input<T>, java.lang.AutoCloseable, java.util.concurrent.Callable<T>, java.util.function.Supplier<T>

Direct Known Subclasses:

SynchronousExpressionInputImpl

public class ExpressionInputImpl<T>
extends java.lang.Object
implements ExpressionInput<T>

Nested Class Summary

Nested classes/interfaces inherited from interface com.github.akurilov.commons.io.el.ExpressionInput

ExpressionInput.Builder

Field Summary

Fields inherited from interface com.github.akurilov.commons.io.el.ExpressionInput

ASYNC_MARKER, FACTORY, SELF_REF_ID, SYNC_MARKER

Fields inherited from interface com.github.akurilov.commons.io.Input

DELIMITER

Constructor Summary

Constructors

Constructor	Description
ExpressionInputImpl(java.lang.String exprStr, T initial, java.lang.Class<T> type, de.odysseus.el.util.SimpleContext ctx)

Method Summary

Modifier and Type	Method	Description
T	call()	Perform the expression evaluation
void	close()
java.lang.String	expr()
T	get()	Get a value.
int	get(java.util.List<T> buffer, int limit)	Bulk values get.
T	last()
void	reset()	Set the last value to the initial one.
long	skip(long count)	Skip some items.
java.lang.String	toString()
java.lang.Class<T>	type()

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionInputImpl

public ExpressionInputImpl(java.lang.String exprStr,
                           T initial,
                           java.lang.Class<T> type,
                           de.odysseus.el.util.SimpleContext ctx)

Method Detail

call

public final T call()
             throws javax.el.PropertyNotFoundException,
                    javax.el.ELException

Description copied from interface: ExpressionInput

Perform the expression evaluation

Specified by:

call in interface java.util.concurrent.Callable<T>

Specified by:

call in interface ExpressionInput<T>

Returns:

the expression evaluation result

Throws:

javax.el.PropertyNotFoundException

javax.el.ELException

last

public final T last()

Specified by:

last in interface ExpressionInput<T>

Returns:

the result of the last expression evaluation

get

public T get()
      throws javax.el.PropertyNotFoundException,
             javax.el.ELException

Description copied from interface: ExpressionInput

Get a value. A user should invoke call() method by itself to evaluate the expression if the given expression input is not synchronous. The initial value only would be returned otherwise.

Specified by:

get in interface ExpressionInput<T>

Specified by:

get in interface Input<T>

Specified by:

get in interface java.util.function.Supplier<T>

Returns:

next item or null if no items available more

Throws:

javax.el.PropertyNotFoundException

javax.el.ELException

get

public int get(java.util.List<T> buffer,
               int limit)
        throws javax.el.PropertyNotFoundException,
               javax.el.ELException

Description copied from interface: ExpressionInput

Bulk values get. A user should invoke call() method by itself to evaluate the expression if the given expression input is not synchronous. The initial value only would be returned otherwise.

Specified by:

get in interface ExpressionInput<T>

Specified by:

get in interface Input<T>

Parameters:

buffer - buffer for the values

limit - max count of the values to put into the buffer

Returns:

count of the items have been get and put into the buffer actually

Throws:

javax.el.PropertyNotFoundException

javax.el.ELException

skip

public long skip(long count)

Description copied from interface: ExpressionInput

Skip some items.

Specified by:

skip in interface ExpressionInput<T>

Specified by:

skip in interface Input<T>

Parameters:

count - count of items should be skipped from the input stream

reset

public final void reset()

Description copied from interface: ExpressionInput

Set the last value to the initial one.

Specified by:

reset in interface ExpressionInput<T>

Specified by:

reset in interface Input<T>

expr

public final java.lang.String expr()

Specified by:

expr in interface ExpressionInput<T>

Returns:

the expression string

type

public final java.lang.Class<T> type()

Specified by:

type in interface ExpressionInput<T>

Returns:

the result type

toString

public final java.lang.String toString()

Overrides:

toString in class java.lang.Object

close

public final void close()

Specified by:

close in interface java.lang.AutoCloseable