org.iq80.leveldb.util

Class SafeListBuilder<T extends Closeable>

java.lang.Object

org.iq80.leveldb.util.SafeListBuilder<T>

Type Parameters:

T - entry type that should be closed if nop properly read.

All Implemented Interfaces:

Closeable, AutoCloseable

public final class SafeListBuilder<T extends Closeable>
extends Object
implements Closeable

If for some reason build() is not called (eg: due to some exception) when close() is called, then Closeable.close() method will be called on each inserted items.

Method Summary

Modifier and Type	Method and Description
com.google.common.collect.ImmutableList.Builder<T>	add(T element) Adds element to the ImmutableList.
com.google.common.collect.ImmutableList.Builder<T>	addAll(Iterable<? extends T> elements) Adds each element of elements to the ImmutableList.
List<T>	build() Returns a newly-created ImmutableList based on the contents of the SafeListBuilder.
static <T extends Closeable> SafeListBuilder<T>	builder() Returns a new builder.
void	close() If build() was not called yet, Closeable.close() method will be called on all items added trough add(Closeable) and addAll(Iterable).

Methods inherited from class java.lang.Object

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

Method Detail

builder

public static final <T extends Closeable> SafeListBuilder<T> builder()

Returns a new builder.

add

public com.google.common.collect.ImmutableList.Builder<T> add(T element)

Adds element to the ImmutableList.

Parameters:

element - the element to add

Returns:

this Builder object

Throws:

NullPointerException - if element is null

addAll

public com.google.common.collect.ImmutableList.Builder<T> addAll(Iterable<? extends T> elements)

Adds each element of elements to the ImmutableList.

Parameters:

elements - the Iterable to add to the ImmutableList

Returns:

this Builder object

Throws:

NullPointerException - if elements is null or contains a null element

build

public List<T> build()

Returns a newly-created ImmutableList based on the contents of the SafeListBuilder.

After this call, close() wont have any effect on item of the list.

close

public void close()
           throws IOException

If build() was not called yet, Closeable.close() method will be called on all items added trough add(Closeable) and addAll(Iterable). If build() was already used, nothing will happen on the data of this builder.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException