diff options
| author | bculkin2442 <bjculkin@mix.wvu.edu> | 2016-10-03 09:11:55 -0400 |
|---|---|---|
| committer | bculkin2442 <bjculkin@mix.wvu.edu> | 2016-10-03 09:11:55 -0400 |
| commit | b0516949d7577b809c75d7267df77bff2cdb078b (patch) | |
| tree | 7bc7786063c6db778a33335b5089cc2fadb2d93d /BJC-Utils2/src/main/java/bjc/utils/funcdata | |
| parent | f7a10e0e57d6f0ea83643c3d5763ff405af73337 (diff) | |
Minor reorganization
Diffstat (limited to 'BJC-Utils2/src/main/java/bjc/utils/funcdata')
3 files changed, 0 insertions, 552 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/funcdata/ITree.java b/BJC-Utils2/src/main/java/bjc/utils/funcdata/ITree.java deleted file mode 100644 index c773f4e..0000000 --- a/BJC-Utils2/src/main/java/bjc/utils/funcdata/ITree.java +++ /dev/null @@ -1,188 +0,0 @@ -package bjc.utils.funcdata; - -import java.util.function.Consumer; -import java.util.function.Function; -import java.util.function.Predicate; -import java.util.function.UnaryOperator; - -import bjc.utils.funcdata.bst.TreeLinearizationMethod; - -/** - * A node in a homogenous tree with a unlimited amount of children - * - * @author ben - * @param <ContainedType> - * The type of data contained in the tree nodes - * - */ -public interface ITree<ContainedType> { - /** - * Add a child to this node - * - * @param child - * The child to add to this node - */ - public void addChild(ITree<ContainedType> child); - - /** - * Collapse a tree into a single version - * - * @param <NewType> - * The intermediate type being folded - * @param <ReturnedType> - * The type that is the end result - * @param leafTransform - * The function to use to convert leaf values - * @param nodeCollapser - * The function to use to convert internal nodes and their - * children - * @param resultTransformer - * The function to use to convert a state to the returned - * version - * @return The final transformed state - */ - public <NewType, ReturnedType> ReturnedType collapse( - Function<ContainedType, NewType> leafTransform, - Function<ContainedType, - Function<IList<NewType>, NewType>> nodeCollapser, - Function<NewType, ReturnedType> resultTransformer); - - /** - * Execute a given action for each of this tree's children - * - * @param action - * The action to execute for each child - */ - void doForChildren(Consumer<ITree<ContainedType>> action); - - /** - * Expand the nodes of a tree into trees, and then merge the contents - * of those trees into a single tree - * - * @param mapper - * The function to use to map values into trees - * @return A tree, with some nodes expanded into trees - */ - public ITree<ContainedType> flatMapTree( - Function<ContainedType, ITree<ContainedType>> mapper); - - /** - * Get the specified child of this tree - * - * @param childNo - * The number of the child to get - * @return The specified child of this tree - */ - default ITree<ContainedType> getChild(int childNo) { - return transformChild(childNo, (child) -> child); - } - - /** - * Get a count of the number of direct children this node has - * - * @return The number of direct children this node has - */ - public int getChildrenCount(); - - /** - * Get the data stored in this node - * - * @return The data stored in this node - */ - default ContainedType getHead() { - return transformHead((head) -> head); - } - - /** - * Rebuild the tree with the same structure, but different nodes - * - * @param <MappedType> - * The type of the new tree - * @param leafTransformer - * The function to use to transform leaf tokens - * @param operatorTransformer - * The function to use to transform internal tokens - * @return The tree, with the nodes changed - */ - public <MappedType> ITree<MappedType> rebuildTree( - Function<ContainedType, MappedType> leafTransformer, - Function<ContainedType, MappedType> operatorTransformer); - - /** - * Transform some of the nodes in this tree - * - * @param nodePicker - * The predicate to use to pick nodes to transform - * @param transformer - * The function to use to transform picked nodes - */ - public void selectiveTransform(Predicate<ContainedType> nodePicker, - UnaryOperator<ContainedType> transformer); - - /** - * Do a top-down transform of the tree - * - * @param transformPicker - * The function to use to pick how to progress - * @param transformer - * The function used to transform picked subtrees - * @return The tree with the transform applied to picked subtrees - */ - public ITree<ContainedType> topDownTransform( - Function<ContainedType, - TopDownTransformResult> transformPicker, - UnaryOperator<ITree<ContainedType>> transformer); - - /** - * Transform one of this nodes children - * - * @param <TransformedType> - * The type of the transformed value - * @param childNo - * The number of the child to transform - * @param transformer - * The function to use to transform the value - * @return The transformed value - * - * @throws IllegalArgumentException - * if the childNo is out of bounds (0 <= childNo <= - * childCount()) - */ - public <TransformedType> TransformedType transformChild(int childNo, - Function<ITree<ContainedType>, TransformedType> transformer); - - /** - * Transform the value that is the head of this node - * - * @param <TransformedType> - * The type of the transformed value - * @param transformer - * The function to use to transform the value - * @return The transformed value - */ - public <TransformedType> TransformedType transformHead( - Function<ContainedType, TransformedType> transformer); - - /** - * Transform the tree into a tree with a different type of token - * - * @param <MappedType> - * The type of the new tree - * @param transformer - * The function to use to transform tokens - * @return A tree with the token types transformed - */ - public <MappedType> ITree<MappedType> transformTree( - Function<ContainedType, MappedType> transformer); - - /** - * Perform an action on each part of the tree - * - * @param linearizationMethod - * The way to traverse the tree - * @param action - * The action to perform on each tree node - */ - public void traverse(TreeLinearizationMethod linearizationMethod, - Consumer<ContainedType> action); -} diff --git a/BJC-Utils2/src/main/java/bjc/utils/funcdata/TopDownTransformResult.java b/BJC-Utils2/src/main/java/bjc/utils/funcdata/TopDownTransformResult.java deleted file mode 100644 index 332c3c1..0000000 --- a/BJC-Utils2/src/main/java/bjc/utils/funcdata/TopDownTransformResult.java +++ /dev/null @@ -1,30 +0,0 @@ -package bjc.utils.funcdata; - -/** - * Represents the results for doing a top-down transform of a tree - * - * @author ben - * - */ -public enum TopDownTransformResult { - /** - * Do not do anything to this node, and ignore it's children - */ - SKIP, - /** - * Transform this node, and don't touch its children - */ - TRANSFORM, - /** - * Ignore this node, and traverse its children - */ - PASSTHROUGH, - /** - * Traverse this nodes children, then transform it - */ - PUSHDOWN, - /** - * Transform this node, then traverse its children - */ - PULLUP; -} diff --git a/BJC-Utils2/src/main/java/bjc/utils/funcdata/Tree.java b/BJC-Utils2/src/main/java/bjc/utils/funcdata/Tree.java deleted file mode 100644 index 68a0ae1..0000000 --- a/BJC-Utils2/src/main/java/bjc/utils/funcdata/Tree.java +++ /dev/null @@ -1,334 +0,0 @@ -package bjc.utils.funcdata; - -import java.util.function.Consumer; -import java.util.function.Function; -import java.util.function.Predicate; -import java.util.function.UnaryOperator; - -import bjc.utils.funcdata.bst.TreeLinearizationMethod; -import bjc.utils.funcutils.StringUtils; - -/** - * A node in a homogenous tree. - * - * @author ben - * - * @param <ContainedType> - */ -public class Tree<ContainedType> implements ITree<ContainedType> { - private ContainedType data; - private IList<ITree<ContainedType>> children; - - private boolean hasChildren; - - private int childCount = 0; - - /** - * Create a new leaf node in a tree - * - * @param leafToken - * The data to store as a leaf node - */ - public Tree(ContainedType leafToken) { - data = leafToken; - - hasChildren = false; - } - - /** - * Create a new tree node with the specified children - * - * @param leafToken - * The data to hold in this node - * @param childrn - * A list of children for this node - */ - public Tree(ContainedType leafToken, - IList<ITree<ContainedType>> childrn) { - data = leafToken; - - hasChildren = true; - - childCount = childrn.getSize(); - - children = childrn; - } - - /** - * Create a new tree node with the specified children - * - * @param leafToken - * The data to hold in this node - * @param childrn - * A list of children for this node - */ - @SafeVarargs - public Tree(ContainedType leafToken, ITree<ContainedType>... childrn) { - data = leafToken; - - hasChildren = true; - - childCount = 0; - - children = new FunctionalList<>(); - - for (ITree<ContainedType> child : childrn) { - children.add(child); - - childCount++; - } - } - - @Override - public void addChild(ITree<ContainedType> child) { - if (hasChildren == false) { - hasChildren = true; - - children = new FunctionalList<>(); - } - - childCount++; - - children.add(child); - } - - @Override - public <NewType, ReturnedType> ReturnedType collapse( - Function<ContainedType, NewType> leafTransform, - Function<ContainedType, - Function<IList<NewType>, NewType>> nodeCollapser, - Function<NewType, ReturnedType> resultTransformer) { - - return resultTransformer - .apply(internalCollapse(leafTransform, nodeCollapser)); - } - - @Override - public void doForChildren(Consumer<ITree<ContainedType>> action) { - children.forEach(action); - } - - @Override - public ITree<ContainedType> flatMapTree( - Function<ContainedType, ITree<ContainedType>> mapper) { - if (hasChildren) { - ITree<ContainedType> flatMappedData = mapper.apply(data); - - children.map((child) -> child.flatMapTree(mapper)) - .forEach((child) -> flatMappedData.addChild(child)); - - return flatMappedData; - } - - return mapper.apply(data); - } - - @Override - public int getChildrenCount() { - return childCount; - } - - protected <NewType> NewType internalCollapse( - Function<ContainedType, NewType> leafTransform, - Function<ContainedType, - Function<IList<NewType>, NewType>> nodeCollapser) { - if (hasChildren) { - Function<IList<NewType>, - NewType> nodeTransformer = nodeCollapser.apply(data); - - IList<NewType> collapsedChildren = (IList<NewType>) children - .map((child) -> { - return child.collapse(leafTransform, nodeCollapser, - (subTreeVal) -> subTreeVal); - }); - - return nodeTransformer.apply(collapsedChildren); - } - - return leafTransform.apply(data); - } - - protected void internalToString(StringBuilder builder, int indentLevel, - boolean initial) { - if (!initial) { - StringUtils.indentNLevels(builder, indentLevel); - } - - builder.append("Node: "); - builder.append(data == null ? "(null)" : data.toString()); - builder.append("\n"); - - if (hasChildren) { - children.forEach((child) -> { - ((Tree<ContainedType>) child).internalToString(builder, - indentLevel + 2, false); - }); - } - } - - @Override - public <MappedType> ITree<MappedType> rebuildTree( - Function<ContainedType, MappedType> leafTransformer, - Function<ContainedType, MappedType> operatorTransformer) { - if (hasChildren) { - IList<ITree<MappedType>> mappedChildren = children - .map((child) -> { - return child.rebuildTree(leafTransformer, - operatorTransformer); - }); - - return new Tree<>(operatorTransformer.apply(data), - mappedChildren); - } - - return new Tree<>(leafTransformer.apply(data)); - } - - @Override - public void selectiveTransform(Predicate<ContainedType> nodePicker, - UnaryOperator<ContainedType> transformer) { - if (hasChildren) { - children.forEach((child) -> child - .selectiveTransform(nodePicker, transformer)); - } else { - data = transformer.apply(data); - } - } - - @Override - public ITree<ContainedType> topDownTransform( - Function<ContainedType, - TopDownTransformResult> transformPicker, - UnaryOperator<ITree<ContainedType>> transformer) { - TopDownTransformResult transformResult = transformPicker - .apply(data); - - switch (transformResult) { - case PASSTHROUGH: - ITree<ContainedType> result = new Tree<>(data); - - if (hasChildren) { - children.forEach((child) -> { - result.addChild(child.topDownTransform( - transformPicker, transformer)); - }); - } - - return result; - case SKIP: - return this; - case TRANSFORM: - return transformer.apply(this); - case PUSHDOWN: - result = new Tree<>(data); - - if (hasChildren) { - children.forEach((child) -> { - result.addChild(child.topDownTransform( - transformPicker, transformer)); - }); - } - - return transformer.apply(result); - case PULLUP: - ITree<ContainedType> intermediateResult = transformer - .apply(this); - - result = new Tree<>(intermediateResult.getHead()); - - intermediateResult.doForChildren((child) -> { - result.addChild(child.topDownTransform(transformPicker, - transformer)); - }); - - return result; - default: - throw new IllegalArgumentException( - "Recieved unknown transform result " - + transformResult); - - } - } - - @Override - public String toString() { - StringBuilder builder = new StringBuilder(); - - internalToString(builder, 1, true); - - builder.deleteCharAt(builder.length() - 1); - - return builder.toString(); - } - - @Override - public <TransformedType> TransformedType transformChild(int childNo, - Function<ITree<ContainedType>, TransformedType> transformer) { - if (childNo < 0 || childNo > (childCount - 1)) { - throw new IllegalArgumentException( - "Child index #" + childNo + " is invalid"); - } - - return transformer.apply(children.getByIndex(childNo)); - } - - @Override - public <TransformedType> TransformedType transformHead( - Function<ContainedType, TransformedType> transformer) { - return transformer.apply(data); - } - - @Override - public <MappedType> ITree<MappedType> transformTree( - Function<ContainedType, MappedType> transformer) { - if (hasChildren) { - IList<ITree<MappedType>> transformedChildren = children - .map((child) -> child.transformTree(transformer)); - - return new Tree<>(transformer.apply(data), - transformedChildren); - } - - return new Tree<>(transformer.apply(data)); - } - - @Override - public void traverse(TreeLinearizationMethod linearizationMethod, - Consumer<ContainedType> action) { - if (hasChildren) { - switch (linearizationMethod) { - case INORDER: - if (childCount != 2) { - throw new IllegalArgumentException( - "Can only do in-order traversal for binary trees."); - } - - children.getByIndex(0).traverse(linearizationMethod, - action); - - action.accept(data); - - children.getByIndex(1).traverse(linearizationMethod, - action); - break; - case POSTORDER: - children.forEach((child) -> child - .traverse(linearizationMethod, action)); - - action.accept(data); - break; - case PREORDER: - action.accept(data); - - children.forEach((child) -> child - .traverse(linearizationMethod, action)); - break; - default: - break; - - } - } else { - action.accept(data); - } - } -} |
