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/* Generator.java -- Generic code generator.
Copyright (C) 2006 Free Software Foundation
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
*/
package gnu.classpath.tools.giop.grmic;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
/**
* Contains basic methods, used in code generation.
*
* @author Audrius Meskauskas, Lithuania (audriusa@Bioinformatics.org)
*/
public class Generator
{
/**
* Get resource with the given name, as string.
*
* @param name the resource name
* @return the resourse string (in subfolder /templates).
*/
public String getResource(String name)
{
String resourcePath = "templates/" + name;
InputStream in = getClass().getResourceAsStream(resourcePath);
if (in == null)
throw new InternalError(getClass().getName() + ": no resource "
+ resourcePath);
BufferedReader r = new BufferedReader(new InputStreamReader(in));
StringBuffer b = new StringBuffer();
String s;
try
{
while ((s = r.readLine()) != null)
{
b.append(s);
b.append('\n');
}
r.close();
}
catch (IOException e)
{
InternalError ierr = new InternalError("No expected resource " + name);
ierr.initCause(e);
throw ierr;
}
return b.toString();
}
/**
* Replace the variable references (starting from #) in the template string by
* the values, present in the given map. The strings, not present in the
* variable map, are ignored.
*
* @param template
* the template string
* @param variables
* the map of variables (name to value) to replace.
* @return the string with replaced values.
*/
public String replaceAll(String template, Map variables)
{
BufferedReader r = new BufferedReader(new StringReader(template));
String s;
StringBuffer b = new StringBuffer(template.length());
try
{
Iterator iter;
Collection vars = variables.keySet();
while ((s = r.readLine()) != null)
{
// At least one variable must appear in the string to make
// the string scan sensible.
if (s.indexOf('#') >= 0)
{
iter = vars.iterator();
String variable;
while (iter.hasNext())
{
variable = (String) iter.next();
if (s.indexOf(variable) >= 0)
s = s.replaceAll(variable,
(String) variables.get(variable));
}
}
b.append(s);
b.append('\n');
}
r.close();
}
catch (IOException e)
{
// This should never happen.
InternalError ierr = new InternalError("");
ierr.initCause(e);
throw ierr;
}
return b.toString();
}
}
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