/**
* Perform copy on read on an element if configured
*
* @param element the element to copy for read
* @return a copy of the element with the reconstructed original value
*/
protected Element copyElementForReadIfNeeded(Element element) {
if (copyOnRead && copyOnWrite) {
return copyStrategy.copyForRead(element);
} else if (copyOnRead) {
return copyStrategy.copyForRead(copyStrategy.copyForWrite(element));
} else {
return element;
}
}
@Test
public void
given_copy_on_write_when_copyElementForWriteIfNeeded_with_Element_then_returns_different() {
Element element = new Element("key", "value");
Element serial = new Element("key", new byte[] {});
when(copyStrategy.copyForWrite(element)).thenReturn(serial);
when(copyStrategy.copyForRead(serial)).thenReturn(new Element("key", "value"));
CopyStrategyHandler copyStrategyHandler = new CopyStrategyHandler(false, true, copyStrategy);
assertThat(
copyStrategyHandler.copyElementForWriteIfNeeded(element),
allOf(not(sameInstance(element)), equalTo(element)));
verify(copyStrategy).copyForWrite(element);
verify(copyStrategy).copyForRead(serial);
}
@Test
public void
given_copy_on_read_and_write_when_copyElementForRemovalIfNeeded_with_Element_then_returns_different() {
Element element = new Element("key", "value");
Element serial = new Element("key", new byte[] {});
when(copyStrategy.copyForWrite(element)).thenReturn(new Element("key", new byte[] {}));
CopyStrategyHandler copyStrategyHandler = new CopyStrategyHandler(true, true, copyStrategy);
assertThat(copyStrategyHandler.copyElementForRemovalIfNeeded(element), is(serial));
verify(copyStrategy).copyForWrite(element);
}
/**
* Perform copy for the element If both copy on read and copy on write are set to true
*
* @param element the element to copy for removal
* @return a copy of the element with a storage-ready value
*/
private Element copyElementForRemovalIfNeeded(Element element) {
if (element == null) {
return null;
}
if (copyOnRead && copyOnWrite) {
return copyStrategy.copyForWrite(element);
} else {
return element;
}
}