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, EXPRESSION_PATTERN, FACTORY, INIT_MARKER, 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, 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()

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,
                           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

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