private void expandAttribute(ChainReader reader, String attribute) throws IOException {
if (!getTemplate().hasAttribute(attribute)) {
return;
}
List<AttributeValue> values = getTemplate().getAttributeValues(attribute);
for (AttributeValue value : values) {
reader.addReader(value.getReader());
}
}
protected void expandLine(ChainReader reader, String line) throws IOException {
String prefix;
String attribute;
String remaining;
int start = line.indexOf("${");
if (start != -1) {
prefix = line.substring(0, start);
int end = line.indexOf("}", start + 2);
if (end != -1) {
// ${attribute} found
attribute = line.substring(start + 2, end);
remaining = line.substring(end + 1);
} else {
// start ${ but no } then assume that no attribute was found
prefix = line;
attribute = null;
remaining = null;
}
} else {
// no attribute found
prefix = line;
attribute = null;
remaining = null;
}
reader.addReader(new StringReader(prefix));
if (attribute != null) {
expandAttribute(reader, attribute);
}
if (remaining == null) {
return;
}
expandLine(reader, remaining);
}