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/*-------------------------------------------------------------------------
*
* Copyright (c) 2003-2005, PostgreSQL Global Development Group
* Copyright (c) 2004, Open Cloud Limited.
*
* IDENTIFICATION
* $PostgreSQL: pgjdbc/org/postgresql/core/v2/V2Query.java,v 1.5 2005/01/11 08:25:43 jurka Exp $
*
*-------------------------------------------------------------------------
*/
package org.postgresql.core.v2;
import java.util.Vector;
import org.postgresql.core.*;
/**
* Query implementation for all queries via the V2 protocol.
*/
class V2Query implements Query {
V2Query(String query, boolean withParameters) {
if (!withParameters)
{
fragments = new String[] { query };
return ;
}
// Parse query and find parameter placeholders.
Vector v = new Vector();
int lastParmEnd = 0;
boolean inSingleQuotes = false;
boolean inDoubleQuotes = false;
for (int i = 0; i < query.length(); ++i)
{
char c = query.charAt(i);
switch (c)
{
case '\\':
if (inSingleQuotes)
++i; // Skip one character.
break;
case '\'':
inSingleQuotes = !inDoubleQuotes && !inSingleQuotes;
break;
case '"':
inDoubleQuotes = !inSingleQuotes && !inDoubleQuotes;
break;
case '?':
if (!inSingleQuotes && !inDoubleQuotes)
{
v.addElement(query.substring (lastParmEnd, i));
lastParmEnd = i + 1;
}
break;
default:
break;
}
}
v.addElement(query.substring (lastParmEnd, query.length()));
fragments = new String[v.size()];
for (int i = 0 ; i < fragments.length; ++i)
fragments[i] = (String)v.elementAt(i);
}
public ParameterList createParameterList() {
if (fragments.length == 1)
return NO_PARAMETERS;
return new SimpleParameterList(fragments.length - 1);
}
public String toString(ParameterList parameters) {
StringBuffer sbuf = new StringBuffer(fragments[0]);
for (int i = 1; i < fragments.length; ++i)
{
if (parameters == null)
sbuf.append("?");
else
sbuf.append(parameters.toString(i));
sbuf.append(fragments[i]);
}
return sbuf.toString();
}
public void close() {
}
String[] getFragments() {
return fragments;
}
private static final ParameterList NO_PARAMETERS = new SimpleParameterList(0);
private final String[] fragments; // Query fragments, length == # of parameters + 1
}
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