mirror of
https://github.com/moses-smt/mosesdecoder.git
synced 2024-12-29 06:52:34 +03:00
60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
#include "xml_tree_parser.h"
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#include "tables-core.h"
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#include "XmlException.h"
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#include "XmlTree.h"
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#include <cassert>
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#include <vector>
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namespace MosesTraining {
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namespace Syntax {
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StringTree *XmlTreeParser::Parse(const std::string &line) {
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line_ = line;
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tree_.Clear();
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try {
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if (!ProcessAndStripXMLTags(line_, tree_, label_set_, top_label_set_,
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false)) {
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throw Exception("");
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}
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} catch (const XmlException &e) {
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throw Exception(e.getMsg());
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}
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tree_.ConnectNodes();
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SyntaxNode *root = tree_.GetTop();
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assert(root);
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words_ = tokenize(line_.c_str());
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return ConvertTree(*root, words_);
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}
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// Converts a SyntaxNode tree to a StringTree.
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StringTree *XmlTreeParser::ConvertTree(const SyntaxNode &tree,
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const std::vector<std::string> &words) {
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StringTree *root = new StringTree(tree.GetLabel());
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const std::vector<SyntaxNode*> &children = tree.GetChildren();
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if (children.empty()) {
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if (tree.GetStart() != tree.GetEnd()) {
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std::ostringstream msg;
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msg << "leaf node covers multiple words (" << tree.GetStart()
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<< "-" << tree.GetEnd() << "): this is currently unsupported";
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throw Exception(msg.str());
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}
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StringTree *leaf = new StringTree(words[tree.GetStart()]);
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leaf->parent() = root;
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root->children().push_back(leaf);
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} else {
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for (std::vector<SyntaxNode*>::const_iterator p = children.begin();
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p != children.end(); ++p) {
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assert(*p);
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StringTree *child = ConvertTree(**p, words);
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child->parent() = root;
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root->children().push_back(child);
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}
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}
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return root;
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}
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} // namespace Syntax
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} // namespace MosesTraining
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