public Tree transformTree(Tree tree) {
Label lab = tree.label();
if (tree.isLeaf()) {
Tree leaf = tf.newLeaf(lab);
leaf.setScore(tree.score());
return leaf;
}
String s = lab.value();
s = treebankLanguagePack().basicCategory(s);
s = treebankLanguagePack().stripGF(s);
int numKids = tree.numChildren();
List<Tree> children = new ArrayList<Tree>(numKids);
for (int cNum = 0; cNum < numKids; cNum++) {
Tree child = tree.getChild(cNum);
Tree newChild = transformTree(child);
children.add(newChild);
}
CategoryWordTag newLabel = new CategoryWordTag(lab);
newLabel.setCategory(s);
if (lab instanceof HasTag) {
String tag = ((HasTag) lab).tag();
tag = treebankLanguagePack().basicCategory(tag);
tag = treebankLanguagePack().stripGF(tag);
newLabel.setTag(tag);
}
Tree node = tf.newTreeNode(newLabel, children);
node.setScore(tree.score());
return node;
}
public Tree transformTree(Tree tree) {
Label lab = tree.label();
if (tree.isLeaf()) {
Tree leaf = tf.newLeaf(lab);
leaf.setScore(tree.score());
return leaf;
}
String s = lab.value();
s = treebankLanguagePack().basicCategory(s);
int numKids = tree.numChildren();
List<Tree> children = new ArrayList<Tree>(numKids);
for (int cNum = 0; cNum < numKids; cNum++) {
Tree child = tree.getChild(cNum);
Tree newChild = transformTree(child);
// cdm 2007: for just subcategory stripping, null shouldn't happen
// if (newChild != null) {
children.add(newChild);
// }
}
// if (children.isEmpty()) {
// return null;
// }
CategoryWordTag newLabel = new CategoryWordTag(lab);
newLabel.setCategory(s);
if (lab instanceof HasTag) {
String tag = ((HasTag) lab).tag();
tag = treebankLanguagePack().basicCategory(tag);
newLabel.setTag(tag);
}
Tree node = tf.newTreeNode(newLabel, children);
node.setScore(tree.score());
return node;
}
/**
* Construct a fall through tree in case we can't parse this sentence
*
* @param words
* @return a tree with X for all the internal nodes
*/
public static Tree xTree(List<? extends HasWord> words) {
TreeFactory lstf = new LabeledScoredTreeFactory();
List<Tree> lst2 = new ArrayList<Tree>();
for (HasWord obj : words) {
String s = obj.word();
Tree t = lstf.newLeaf(s);
Tree t2 = lstf.newTreeNode("X", Collections.singletonList(t));
lst2.add(t2);
}
return lstf.newTreeNode("X", lst2);
}
/** Build a parse tree node corresponding to an elliptic node in the parse XML. */
private Tree buildEllipticNode(Node root) {
Element eRoot = (Element) root;
String constituentStr = eRoot.getNodeName();
List<Tree> kids = new ArrayList<>();
Tree leafNode = treeFactory.newLeaf(SpanishTreeNormalizer.EMPTY_LEAF_VALUE);
if (leafNode.label() instanceof HasWord)
((HasWord) leafNode.label()).setWord(SpanishTreeNormalizer.EMPTY_LEAF_VALUE);
kids.add(leafNode);
Tree t = treeFactory.newTreeNode(constituentStr, kids);
return t;
}
public static Tree untransformTree(Tree tree) {
TreeFactory tf = tree.treeFactory();
if (tree.isPrePreTerminal()) {
if (tree.firstChild().label().value().matches(".*_.")) {
StringBuilder word = new StringBuilder();
for (int i = 0; i < tree.children().length; i++) {
Tree child = tree.children()[i];
word.append(child.firstChild().label().value());
}
Tree newChild = tf.newLeaf(word.toString());
tree.setChildren(Collections.singletonList(newChild));
}
} else {
for (int i = 0; i < tree.children().length; i++) {
Tree child = tree.children()[i];
untransformTree(child);
}
}
return tree;
}
public Tree transformTree(Tree tree) {
TreeFactory tf = tree.treeFactory();
String tag = tree.label().value();
if (tree.isPreTerminal()) {
String word = tree.firstChild().label().value();
List<Tree> newPreterms = new ArrayList<>();
for (int i = 0, size = word.length(); i < size; i++) {
String singleCharLabel = new String(new char[] {word.charAt(i)});
Tree newLeaf = tf.newLeaf(singleCharLabel);
String suffix;
if (useTwoCharTags) {
if (word.length() == 1 || i == 0) {
suffix = "_S";
} else {
suffix = "_M";
}
} else {
if (word.length() == 1) {
suffix = "_S";
} else if (i == 0) {
suffix = "_B";
} else if (i == word.length() - 1) {
suffix = "_E";
} else {
suffix = "_M";
}
}
newPreterms.add(tf.newTreeNode(tag + suffix, Collections.<Tree>singletonList(newLeaf)));
}
return tf.newTreeNode(tag, newPreterms);
} else {
List<Tree> newChildren = new ArrayList<>();
for (int i = 0; i < tree.children().length; i++) {
Tree child = tree.children()[i];
newChildren.add(transformTree(child));
}
return tf.newTreeNode(tag, newChildren);
}
}
/** Build a parse tree node corresponding to the word in the given XML node. */
private Tree buildWordNode(Node root) {
Element eRoot = (Element) root;
String posStr = getPOS(eRoot);
posStr = treeNormalizer.normalizeNonterminal(posStr);
String lemma = eRoot.getAttribute(ATTR_LEMMA);
String word = getWord(eRoot);
String leafStr = treeNormalizer.normalizeTerminal(word);
Tree leafNode = treeFactory.newLeaf(leafStr);
if (leafNode.label() instanceof HasWord) ((HasWord) leafNode.label()).setWord(leafStr);
if (leafNode.label() instanceof HasLemma && lemma != null)
((HasLemma) leafNode.label()).setLemma(lemma);
List<Tree> kids = new ArrayList<>();
kids.add(leafNode);
Tree t = treeFactory.newTreeNode(posStr, kids);
if (t.label() instanceof HasTag) ((HasTag) t.label()).setTag(posStr);
return t;
}
public static Tree createStanfordTree(Annotation root, TreeFactory tFact) {
JCas aJCas;
try {
aJCas = root.getCAS().getJCas();
} catch (CASException e) {
throw new IllegalStateException("Unable to get JCas from JCas wrapper");
}
// define the new (root) node
Tree rootNode;
// before we can create a node, we must check if we have any children (we have to know
// whether to create a node or a leaf - not very dynamic)
if (root instanceof Constituent && !isLeaf((Constituent) root)) {
Constituent node = (Constituent) root;
List<Tree> childNodes = new ArrayList<Tree>();
// get childNodes from child annotations
FSArray children = node.getChildren();
for (int i = 0; i < children.size(); i++) {
childNodes.add(createStanfordTree(node.getChildren(i), tFact));
}
// now create the node with its children
rootNode = tFact.newTreeNode(node.getConstituentType(), childNodes);
} else {
// Handle leaf annotations
// Leafs are always Token-annotations
// We also have to insert a Preterminal node with the value of the
// POS-Annotation on the token
// because the POS is not directly stored within the treee
Token wordAnnotation = (Token) root;
// create leaf-node for the tree
Tree wordNode = tFact.newLeaf(wordAnnotation.getCoveredText());
// create information about preceding and trailing whitespaces in the leaf node
StringBuilder preWhitespaces = new StringBuilder();
StringBuilder trailWhitespaces = new StringBuilder();
List<Token> precedingTokenList = selectPreceding(aJCas, Token.class, wordAnnotation, 1);
List<Token> followingTokenList = selectFollowing(aJCas, Token.class, wordAnnotation, 1);
if (precedingTokenList.size() > 0) {
Token precedingToken = precedingTokenList.get(0);
int precedingWhitespaces = wordAnnotation.getBegin() - precedingToken.getEnd();
for (int i = 0; i < precedingWhitespaces; i++) {
preWhitespaces.append(" ");
}
}
if (followingTokenList.size() > 0) {
Token followingToken = followingTokenList.get(0);
int trailingWhitespaces = followingToken.getBegin() - wordAnnotation.getEnd();
for (int i = 0; i < trailingWhitespaces; i++) {
trailWhitespaces.append(" ");
}
}
// write whitespace information as CoreAnnotation.BeforeAnnotation and
// CoreAnnotation.AfterAnnotation to the node add annotation to list and write back to
// node label
((CoreLabel) wordNode.label())
.set(CoreAnnotations.BeforeAnnotation.class, preWhitespaces.toString());
((CoreLabel) wordNode.label())
.set(CoreAnnotations.AfterAnnotation.class, trailWhitespaces.toString());
// get POS-annotation
// get the token that is covered by the POS
List<POS> coveredPos = JCasUtil.selectCovered(aJCas, POS.class, wordAnnotation);
// the POS should only cover one token
assert coveredPos.size() == 1;
POS pos = coveredPos.get(0);
// create POS-Node in the tree and attach word-node to it
rootNode = tFact.newTreeNode(pos.getPosValue(), Arrays.asList((new Tree[] {wordNode})));
}
return rootNode;
}
