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/*
* srl_sentence.h
*
* Created on: May 26, 2013
* Author: junhuili
*/
#ifndef SRL_SENTENCE_H_
#define SRL_SENTENCE_H_
#include <sstream>
#include <vector>
#include "tree.h"
#include "stringlib.h"
using namespace std;
struct SArgument {
SArgument(const char* pszRole, int iBegin, int iEnd, float fProb) {
m_pszRole = new char[strlen(pszRole) + 1];
strcpy(m_pszRole, pszRole);
m_iBegin = iBegin;
m_iEnd = iEnd;
m_fProb = fProb;
m_pTreeItem = NULL;
}
~SArgument() { delete[] m_pszRole; }
void fnSetTreeItem(STreeItem* pTreeItem) {
m_pTreeItem = pTreeItem;
if (m_pTreeItem != NULL && m_pTreeItem->m_iBegin != -1) {
assert(m_pTreeItem->m_iBegin == m_iBegin);
assert(m_pTreeItem->m_iEnd == m_iEnd);
}
}
char* m_pszRole; // argument rule, e.g., ARG0, ARGM-TMP
int m_iBegin;
int m_iEnd; // the span of the argument, [m_iBegin, m_iEnd]
float m_fProb; // the probability of this role,
STreeItem* m_pTreeItem;
};
struct SPredicate {
SPredicate(const char* pszLemma, int iPosition) {
if (pszLemma != NULL) {
m_pszLemma = new char[strlen(pszLemma) + 1];
strcpy(m_pszLemma, pszLemma);
} else
m_pszLemma = NULL;
m_iPosition = iPosition;
}
~SPredicate() {
if (m_pszLemma != NULL) delete[] m_pszLemma;
for (size_t i = 0; i < m_vecArgt.size(); i++) delete m_vecArgt[i];
}
int fnAppend(const char* pszRole, int iBegin, int iEnd) {
SArgument* pArgt = new SArgument(pszRole, iBegin, iEnd, 1.0);
return fnAppend(pArgt);
}
int fnAppend(SArgument* pArgt) {
m_vecArgt.push_back(pArgt);
int iPosition = m_vecArgt.size() - 1;
return iPosition;
}
char* m_pszLemma; // lemma of the predicate, for Chinese, it's always as same
// as the predicate itself
int m_iPosition; // the position in sentence
vector<SArgument*> m_vecArgt; // arguments associated to the predicate
};
struct SSrlSentence {
SSrlSentence() { m_pTree = NULL; }
~SSrlSentence() {
if (m_pTree != NULL) delete m_pTree;
for (size_t i = 0; i < m_vecPred.size(); i++) delete m_vecPred[i];
}
int fnAppend(const char* pszLemma, int iPosition) {
SPredicate* pPred = new SPredicate(pszLemma, iPosition);
return fnAppend(pPred);
}
int fnAppend(SPredicate* pPred) {
m_vecPred.push_back(pPred);
int iPosition = m_vecPred.size() - 1;
return iPosition;
}
int GetPredicateNum() { return m_vecPred.size(); }
SParsedTree* m_pTree;
vector<SPredicate*> m_vecPred;
};
struct SSrlSentenceReader {
SSrlSentenceReader(const char* pszSrlFname) {
m_fpIn = fopen(pszSrlFname, "r");
assert(m_fpIn != NULL);
}
~SSrlSentenceReader() {
if (m_fpIn != NULL) fclose(m_fpIn);
}
inline void fnReplaceAll(std::string& str, const std::string& from,
const std::string& to) {
size_t start_pos = 0;
while ((start_pos = str.find(from, start_pos)) != std::string::npos) {
str.replace(start_pos, from.length(), to);
start_pos += to.length(); // In case 'to' contains 'from', like replacing
// 'x' with 'yx'
}
}
// TODO: here only considers flat predicate-argument structure
// i.e., no overlap among them
SSrlSentence* fnReadNextSrlSentence() {
vector<vector<string> > vecContent;
if (fnReadNextContent(vecContent) == false) return NULL;
SSrlSentence* pSrlSentence = new SSrlSentence();
int iSize = vecContent.size();
// put together syntactic text
std::ostringstream ostr;
for (int i = 0; i < iSize; i++) {
string strSynSeg =
vecContent[i][5]; // the 5th column is the syntactic segment
size_t iPosition = strSynSeg.find_first_of('*');
assert(iPosition != string::npos);
ostringstream ostrTmp;
ostrTmp << "(" << vecContent[i][2] << " " << vecContent[i][0]
<< ")"; // the 2th column is POS-tag, and the 0th column is word
strSynSeg.replace(iPosition, 1, ostrTmp.str());
fnReplaceAll(strSynSeg, "(", " (");
ostr << strSynSeg;
}
string strSyn = ostr.str();
pSrlSentence->m_pTree = SParsedTree::fnConvertFromString(strSyn.c_str());
pSrlSentence->m_pTree->fnSetHeadWord();
pSrlSentence->m_pTree->fnSetSpanInfo();
// read predicate-argument structure
int iNumPred = vecContent[0].size() - 8;
for (int i = 0; i < iNumPred; i++) {
vector<string> vecRole;
vector<int> vecBegin;
vector<int> vecEnd;
int iPred = -1;
for (int j = 0; j < iSize; j++) {
const char* p = vecContent[j][i + 8].c_str();
const char* q;
if (p[0] == '(') {
// starting position of an argument(or predicate)
vecBegin.push_back(j);
q = strchr(p, '*');
assert(q != NULL);
vecRole.push_back(vecContent[j][i + 8].substr(1, q - p - 1));
if (vecRole.back().compare("V") == 0) {
assert(iPred == -1);
iPred = vecRole.size() - 1;
}
}
if (p[strlen(p) - 1] == ')') {
// end position of an argument(or predicate)
vecEnd.push_back(j);
assert(vecBegin.size() == vecEnd.size());
}
}
assert(iPred != -1);
SPredicate* pPred = new SPredicate(
pSrlSentence->m_pTree->m_vecTerminals[vecBegin[iPred]]->m_pszTerm,
vecBegin[iPred]);
pSrlSentence->fnAppend(pPred);
for (size_t j = 0; j < vecBegin.size(); j++) {
if (j == iPred) continue;
pPred->fnAppend(vecRole[j].c_str(), vecBegin[j], vecEnd[j]);
pPred->m_vecArgt.back()->fnSetTreeItem(
pSrlSentence->m_pTree->fnFindNodeForSpan(vecBegin[j], vecEnd[j],
false));
}
}
return pSrlSentence;
}
private:
bool fnReadNextContent(vector<vector<string> >& vecContent) {
vecContent.clear();
if (feof(m_fpIn) == true) return false;
char* pszLine;
pszLine = new char[100001];
pszLine[0] = '\0';
int iLen;
while (!feof(m_fpIn)) {
fgets(pszLine, 10001, m_fpIn);
iLen = strlen(pszLine);
while (iLen > 0 && pszLine[iLen - 1] > 0 && pszLine[iLen - 1] < 33) {
pszLine[iLen - 1] = '\0';
iLen--;
}
if (iLen == 0) break; // end of this sentence
vector<string> terms = SplitOnWhitespace(string(pszLine));
assert(terms.size() > 7);
vecContent.push_back(terms);
}
delete[] pszLine;
return true;
}
private:
FILE* m_fpIn;
};
#endif /* SRL_SENTENCE_H_ */
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