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Exercise-OutputMapper-Leonid #207

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30 changes: 20 additions & 10 deletions mapper/src/main/java/jetbrains/jetpad/mapper/Mapper.java
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@

import com.google.common.collect.Iterators;
import jetbrains.jetpad.base.ThrowableHandlers;
import jetbrains.jetpad.model.collections.ObservableCollection;
import jetbrains.jetpad.model.collections.list.ObservableArrayList;
import jetbrains.jetpad.model.collections.list.ObservableList;
import jetbrains.jetpad.model.collections.set.ObservableHashSet;
Expand Down Expand Up @@ -74,6 +75,7 @@ public abstract class Mapper<SourceT, TargetT> {

private Object[] myParts = EMPTY_PARTS;
private Mapper<?, ?> myParent;
private ObservableCollection<Mapper<?,?>> childrenContainer = createChildSet();

/**
* Construct a mapper with SourceT source and TargetT target
Expand Down Expand Up @@ -334,7 +336,15 @@ protected int toNext(int index) {
return new ChildProperty<>();
}

private void addChild(Mapper<?, ?> child) {
public void addChild(Mapper<?,?> mapper) {
childrenContainer.add(mapper);
}

public void removeChild(Mapper<?,?> mapper) {
childrenContainer.remove(mapper);
}

private void addChildInternal(Mapper<?, ?> child) {
if (myState != State.ATTACHING_SYNCHRONIZERS && myState != State.ATTACHING_CHILDREN && myState != State.ATTACHED) {
throw new IllegalStateException("State = " + myState);
}
Expand All @@ -345,7 +355,7 @@ private void addChild(Mapper<?, ?> child) {
}
}

private void removeChild(Mapper<?, ?> child) {
private void removeChildInternal(Mapper<?, ?> child) {
child.detach();
child.myParent = null;
}
Expand Down Expand Up @@ -376,12 +386,12 @@ public void set(MapperT value) {
MapperT oldValue = get();
if (oldValue != null) {
checkCanRemove(oldValue);
removeChild(oldValue);
removeChildInternal(oldValue);
}
super.set(value);
if (value != null) {
checkCanAdd(value);
addChild(value);
addChildInternal(value);
}
}

Expand Down Expand Up @@ -422,20 +432,20 @@ protected void beforeItemAdded(int index, MapperT item) {
if (isEmpty()) {
addPart(this);
}
addChild(item);
addChildInternal(item);
super.beforeItemAdded(index, item);
}

@Override
protected void beforeItemSet(int index, MapperT oldItem, MapperT newItem) {
removeChild(oldItem);
addChild(newItem);
removeChildInternal(oldItem);
addChildInternal(newItem);
super.beforeItemSet(index, oldItem, newItem);
}

@Override
protected void beforeItemRemoved(int index, MapperT item) {
removeChild(item);
removeChildInternal(item);
super.beforeItemRemoved(index, item);
}

Expand Down Expand Up @@ -469,13 +479,13 @@ protected void beforeItemAdded(MapperT item) {
if (isEmpty()) {
addPart(this);
}
addChild(item);
addChildInternal(item);
super.beforeItemAdded(item);
}

@Override
protected void beforeItemRemoved(MapperT item) {
removeChild(item);
removeChildInternal(item);
super.beforeItemRemoved(item);
}

Expand Down