org.shapelogic.streams
Class BaseListStream1<In,E>
java.lang.Object
org.shapelogic.streams.BaseListCommonStream<E>
org.shapelogic.streams.BaseListStream1<In,E>
- All Implemented Interfaces:
- java.lang.Iterable<E>, java.util.Iterator<E>, Calc1<In,E>, CalcValue<E>, ContextGettable, LazyCalc<E>, RecursiveContext, InputStream1<In,E>, ListStream<E>, NumberedStream<E>, Stream<E>, StreamProperties
- Direct Known Subclasses:
- BaseListFilterTransformerStream, ListCalcStream1, ListFilterCalcStream1
public abstract class BaseListStream1<In,E>
- extends BaseListCommonStream<E>
- implements InputStream1<In,E>
Implementation of ListStream.
Close to
1: a lazy stream.
2: a UNIX pipe.
This is close to org.apache.commons.collections.list.LazyList,
but that takes a factory to calculate next element, and that works badly here.
How should a step work?
Normally call the hasNext, in order for this to work it would have to do the
calculation.
So _current should be the last element that has been returned.
So when you call hasNext it will add that element to the list.
When you call next it will bump the counter up one element if goes too high
then do the calculation.
At the end it will get to a point where the calculation fails.
At that point last will be set to the current element.
I will ignore synchronization to begin with.
- Author:
- Sami Badawi
Fields inherited from class org.shapelogic.streams.BaseListCommonStream |
_context, _current, _dirty, _last, _list, _maxLast, _name, _nullLegalValue, _parentContext, _query, _value |
Methods inherited from class org.shapelogic.streams.BaseListCommonStream |
calcAddNext, get, getContext, getCurrentSize, getInContext, getIndex, getLast, getMaxLast, getName, getParentContext, getValue, hasNext, hasNextBase, isCached, isDeterministic, isDirty, isNullLegalValue, isRandomAccess, iterator, next, remove, setMaxLast, setNullLegalValue, setup |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface org.shapelogic.calculation.Calc1 |
invoke |
_inputStream
protected NumberedStream<In> _inputStream
- Does not always exist.
BaseListStream1
public BaseListStream1(NumberedStream<In> inputStream,
int maxLast)
BaseListStream1
public BaseListStream1(ListStream<In> inputStream)
BaseListStream1
public BaseListStream1()
invokeIndex
public E invokeIndex(int index)
- Description copied from class:
BaseListCommonStream
- Calculate the value at an index.
So it gets the needed input value and call the appropriate invoke function.
Can this be used for a filter call?
The index does not make sense for a filter since you do not know where
the input is coming from. So maybe just ignore it.
This is a little messy but less messy that what is there now.
- Specified by:
invokeIndex
in class BaseListCommonStream<E>
getList
public java.util.List<E> getList()
- Description copied from interface:
ListStream
- Get underlying list.
- Specified by:
getList
in interface ListStream<E>
- Overrides:
getList
in class BaseListCommonStream<E>
setList
public void setList(java.util.List<E> list)
- Description copied from interface:
ListStream
- Get underlying list.
- Specified by:
setList
in interface ListStream<E>
- Overrides:
setList
in class BaseListCommonStream<E>
getInputStream
public NumberedStream<In> getInputStream()
- Description copied from interface:
InputStream1
- Stream that this stream is connected to.
What if the Range is of different type?
I think that maybe I can relax this later.
- Specified by:
getInputStream
in interface InputStream1<In,E>
getInput
public In getInput(int index)
- Specified by:
getInput
in interface InputStream1<In,E>
setLastFromInput
protected void setLastFromInput()
- Overrides:
setLastFromInput
in class BaseListCommonStream<E>
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