com.ctc.wstx.dtd.DTDIdAttr Maven / Gradle / Ivy
package com.ctc.wstx.dtd;
import javax.xml.stream.Location;
import javax.xml.stream.XMLStreamException;
import com.ctc.wstx.cfg.ErrorConsts;
import com.ctc.wstx.io.WstxInputData;
import com.ctc.wstx.sr.InputProblemReporter;
import com.ctc.wstx.util.ElementId;
import com.ctc.wstx.util.ElementIdMap;
import com.ctc.wstx.util.PrefixedName;
/**
* Specific attribute class for attributes that contain (unique)
* identifiers.
*/
public final class DTDIdAttr
extends DTDAttribute
{
/*
///////////////////////////////////////////////////
// Life-cycle
///////////////////////////////////////////////////
*/
/**
* Main constructor. Note that id attributes can never have
* default values.
*
* note: although ID attributes are not to have default value,
* this is 'only' a validity constraint, and in dtd-aware-but-
* not-validating mode it is apparently 'legal' to add default
* values.
*/
public DTDIdAttr(PrefixedName name, DefaultAttrValue defValue, int specIndex,
boolean nsAware, boolean xml11)
{
super(name, defValue, specIndex, nsAware, xml11);
}
public DTDAttribute cloneWith(int specIndex)
{
return new DTDIdAttr(mName, mDefValue, specIndex, mCfgNsAware, mCfgXml11);
}
/*
///////////////////////////////////////////////////
// Public API
///////////////////////////////////////////////////
*/
public int getValueType() {
return TYPE_ID;
}
public boolean typeIsId() {
return true;
}
/*
///////////////////////////////////////////////////
// Public API, validation
///////////////////////////////////////////////////
*/
/**
* Method called by the validator
* to let the attribute do necessary normalization and/or validation
* for the value.
*/
public String validate(DTDValidatorBase v, char[] cbuf, int start, int end, boolean normalize)
throws XMLStreamException
{
// Let's trim leading white space first...
while (start < end && WstxInputData.isSpaceChar(cbuf[start])) {
++start;
}
// No id?
if (start >= end) {
return reportValidationProblem(v, "Empty ID value");
}
--end; // so that it now points to the last char
while (end > start && WstxInputData.isSpaceChar(cbuf[end])) {
--end;
}
// Ok, need to check char validity, and also calc hash code:
char c = cbuf[start];
if (!WstxInputData.isNameStartChar(c, mCfgNsAware, mCfgXml11)) {
return reportInvalidChar(v, c, "not valid as the first ID character");
}
int hash = (int) c;
for (int i = start+1; i <= end; ++i) {
c = cbuf[i];
if (!WstxInputData.isNameChar(c, mCfgNsAware, mCfgXml11)) {
return reportInvalidChar(v, c, "not valid as an ID character");
}
hash = (hash * 31) + (int) c;
}
// Either way, we do need to validate characters, and calculate hash
ElementIdMap m = v.getIdMap();
PrefixedName elemName = v.getElemName();
Location loc = v.getLocation();
ElementId id = m.addDefined(cbuf, start, (end - start + 1), hash,
loc, elemName, mName);
// We can detect dups by checking if Location is the one we passed:
if (id.getLocation() != loc) {
return reportValidationProblem(v, "Duplicate id '"+id.getId()+"', first declared at "
+id.getLocation());
}
if (normalize) {
return id.getId();
}
return null;
}
/**
* Method called by the validator
* to ask attribute to verify that the default it has (if any) is
* valid for such type.
*/
public void validateDefault(InputProblemReporter rep, boolean normalize)
{
// Should never get called
throw new IllegalStateException(ErrorConsts.ERR_INTERNAL);
}
}