--- /dev/null
+\r
+/******************************************************************************\r
+ * Copyright (C) 2009 by Diego Arroyuelo *\r
+ * Builder class for the in-memory XQuery/XPath engine *\r
+ * *\r
+ * This program is free software; you can redistribute it and/or modify *\r
+ * it under the terms of the GNU Lesser General Public License as published *\r
+ * by the Free Software Foundation; either version 2 of the License, or *\r
+ * (at your option) any later version. *\r
+ * *\r
+ * This program is distributed in the hope that it will be useful, *\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *\r
+ * GNU Lesser General Public License for more details. *\r
+ * *\r
+ * You should have received a copy of the GNU Lesser General Public License *\r
+ * along with this program; if not, write to the *\r
+ * Free Software Foundation, Inc., *\r
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *\r
+ ******************************************************************************/ \r
+\r
+#ifndef XMLTREEBUILDER_H_\r
+#define XMLTREEBUILDER_H_\r
+#include "TextCollection/TextCollectionBuilder.h"\r
+#include <stdio.h>\r
+#include <stdlib.h>\r
+#include <cstring>\r
+\r
+\r
+#undef W\r
+#undef WW\r
+#undef Wminusone\r
+\r
+#include "bp.h"\r
+#include "XMLTree.h"\r
+#include <static_bitsequence.h>\r
+#include <alphabet_mapper.h>\r
+#include <static_sequence.h>\r
+using SXSI::TextCollection;\r
+using SXSI::TextCollectionBuilder;\r
+\r
+#define NULLT -1\r
+\r
+ // sets bit p in e\r
+#define bitset(e,p) ((e)[(p)/W] |= (1<<((p)%W)))\r
+ // cleans bit p in e\r
+#define bitclean(e,p) ((e)[(p)/W] &= ~(1<<((p)%W)))\r
+\r
+\r
+class XMLTreeBuilder {\r
+ \r
+ /** Array containing the balanced parentheses sequence */\r
+ pb *par_aux;\r
+ int parArraySize;\r
+ int npar;\r
+\r
+ /** Mapping from tag identifer to tag name */ \r
+ unsigned char **TagName;\r
+ int ntagnames;\r
+\r
+ /** Array containing the sequence of tags */\r
+ TagType *tags_aux;\r
+ \r
+ /** The texts in the XML document */\r
+ TextCollectionBuilder *TextBuilder;\r
+ TextCollection *Text;\r
+ \r
+ /** The texts in the XML document (cached for faster display) */\r
+ vector<string> CachedText;\r
+\r
+ /** boolean flag indicating whether we are indexing empty texts or not */\r
+ bool indexing_empty_texts; \r
+ unsigned int *empty_texts_aux;\r
+\r
+ // The TagName array should always contains two special tags\r
+ // <@> for attributes and <$> for PCDATA.\r
+ // <$> can never be in a document (since we handle the text differently)\r
+ // but <@> can be returned by the parser. This boolean is needed for the construction\r
+ // of the Tag bitmap to know if <@> must be taken into account or not\r
+ bool found_attributes;\r
+\r
+ // Allows to disable the TextCollection for benchmarkin purposes\r
+ bool disable_tc;\r
+\r
+public:\r
+\r
+ XMLTreeBuilder() {;};\r
+\r
+ ~XMLTreeBuilder();\r
+ \r
+ /** OpenDocument(empty_texts,sample_rate_text,dtc): initilizes the construction\r
+ * of the data structure for the XML document. Parameter empty_texts \r
+ * indicates whether we index empty texts in document or not. Parameter \r
+ * sample_rate_text indicates the sampling rate for the text searching data\r
+ * structures (small values get faster searching but a bigger space \r
+ * requirement). dtc disable the use of the TextCollection\r
+ * (i.e. everything is considered an empty text *)\r
+ * Returns a non-zero value upon success, NULLT in case of \r
+ * error. */\r
+ int OpenDocument(bool empty_texts, int sample_rate_text, bool dtc);\r
+\r
+ /** CloseDocument(): finishes the construction of the data structure for \r
+ * the XML document. Tree and tags are represented in the final form, \r
+ * dynamic data structures are made static, returning the resulting\r
+ * XMLTree. After that, the XMLTree data structure can be queried. */\r
+ XMLTree *CloseDocument();\r
+\r
+ /** NewOpenTag(tagname): indicates the event of finding a new opening tag \r
+ * in the document. Tag name is given. Returns a non-zero value upon \r
+ * success, and returns NULLT in case of error. */\r
+ int NewOpenTag(unsigned char *tagname);\r
+ \r
+ /** NewClosingTag(tagname): indicates the event of finding a new closing tag\r
+ * in the document. Tag name is given. Returns a non-zero value upon \r
+ * success, and returns NULLT in case of error. */\r
+ int NewClosingTag(unsigned char *tagname);\r
+ \r
+ /** NewText(s): indicates the event of finding a new (non-empty) text s in \r
+ * the document. The new text is inserted within the text collection. \r
+ * Returns a non-zero value upon success, NULLT in case of error. */\r
+ int NewText(unsigned char *s);\r
+\r
+ /** NewEmptyText(): indicates the event of finding a new empty text in the \r
+ * document. In case of indexing empty and non-empty texts, we insert the \r
+ * empty texts into the text collection. In case of indexing only non-empty\r
+ * texts, it just indicates an empty text in the bit vector of empty texts. \r
+ * Returns a non-zero value upon success, NULLT in case of error. */\r
+ int NewEmptyText();\r
+};\r
+#endif\r
+\r
projects / SXSI / XMLTree.git / blobdiff