package org.caudexorigo.jpt;
import java.io.IOException;
import java.io.Serializable;
import java.io.Writer;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import nu.xom.Attribute;
import org.apache.commons.lang3.StringEscapeUtils;
import org.apache.commons.lang3.StringUtils;
import org.caudexorigo.ErrorAnalyser;
import org.mvel2.MVEL;
import org.mvel2.ParserContext;
public class JptAttributeNode extends JptNode
{
private String _attr_exp;
private char[] _attribute_name;
private static final char[] EQUAL_SIGN = "=".toCharArray();
private static final char[] QUOTE = "\"".toCharArray();
private static final char[] SPACE = " ".toCharArray();
private boolean _isInSlot;
private Serializable _compiled_exp;
JptAttributeNode(Attribute attribute, boolean isInSlot)
{
_isInSlot = isInSlot;
_attribute_name = attribute.getQualifiedName().toCharArray();
_attr_exp = attribute.getValue().replace("\'", "\"").trim();
}
public int getChildCount()
{
return 0;
}
public JptNode getChild(int i)
{
throw new IndexOutOfBoundsException("Attributes do not have children");
}
public void render(Map<String, Object> context, Writer out) throws IOException
{
try
{
if (_compiled_exp == null)
{
ParserContext parser_context = ParserContext.create();
Set<Entry<String, Object>> ctx_entries = context.entrySet();
for (Entry<String, Object> entry : ctx_entries)
{
parser_context.addInput(entry.getKey(), entry.getValue().getClass());
}
// Compile the expression.
_compiled_exp = MVEL.compileExpression(_attr_exp, parser_context);
}
//System.err.println(String.format("attribute expression: '%s';%n\tcontext: %s", _attr_exp, context));
String v = String.valueOf(MVEL.executeExpression(_compiled_exp, context));
if (StringUtils.isNotBlank(v))
{
String sout = StringEscapeUtils.escapeXml(v);
out.write(SPACE, 0, 1);
out.write(_attribute_name, 0, _attribute_name.length);
out.write(EQUAL_SIGN, 0, 1);
out.write(QUOTE, 0, 1);
out.write(sout);
out.write(QUOTE, 0, 1);
}
}
catch (Throwable t)
{
Throwable r = ErrorAnalyser.findRootCause(t);
throw new RuntimeException(String.format("Error processing JptAttributeNode:%nexpression: '%s';%ncontext: %s;%nmessage: '%s'", _attr_exp, context, r.getMessage()));
}
}
public boolean isInSlot()
{
return _isInSlot;
}
}