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package edu.ucsb.nceas.metacat;
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/**
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* Before Metacat 1.8.1 release, Metacat uses the eml201 schema with the tag
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* RELEASE_EML_2_0_1_UPDATE_5. Unfortunately, this tag points at wrong version
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* of eml-resource.xsd. In this schema, the element "references" has an attribute named
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* "system" and the attribute has a default value "document". Metacat will add
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* the attribute system="document" to "references" element even the orginal eml didn't have it
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* (this is another bug and see bug 1601), so this causes metacat generated some invalid eml201
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* documents. This class provides a path to fix the existed invalid eml201 documents. It will
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* remove the attribute system="document" of the element "references" in xml_nodes and xml_index
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* tables.
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* @author tao
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*
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*/
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public class EML201DocumentCorrector implements Runnable
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{
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/**
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* Default constructor
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*
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*/
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public EML201DocumentCorrector()
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{
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}
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/**
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* It will remove the records - attribute system="document" of element "refrence"
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* in both xml_nodes and xml_index table
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*/
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public void run()
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{
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}
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/*
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* Generate the sql command to delete the records in xml_node table
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*/
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private String generateXML_NodeDeletingSQL()
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{
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String sql ="delete from xml_nodes where nodetype='ATTRIBUTE' and nodename='system' and nodevalue='document' "+
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"and parentnodeid in (select nodeid from xml_nodes where nodetype='ELEMENT' and nodename='references') and docid in "+
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"(select docid from xml_documents where doctype ='eml://ecoinformatics.org/eml-2.0.1'";
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return sql;
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}
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/*
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* Generate the sql command to delete the records in xml_nidex table;
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*/
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private String generateXML_IndexDeletingSQL()
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{
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String sql ="delete from xml_index where path ='references/@system' AND docid in "+
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"(select docid from xml_documents where doctype ='eml://ecoinformatics.org/eml-2.0.1'";
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return sql;
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}
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}
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