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package com.sun.faces.taglib.jsf_core;
import java.text.MessageFormat;
import java.util.ResourceBundle;
import org.xml.sax.Attributes;
import com.sun.faces.RIConstants;
import com.sun.faces.taglib.FacesValidator;
import com.sun.faces.taglib.TagParser;
import com.sun.faces.taglib.ValidatorInfo;
/**
* <p>Parses tags to verify that an id attribute is present if it is
* determined to be required</p>
*/
public class IdTagParserImpl implements TagParser {
//*********************************************************************
// Constants
//*********************************************************************
// Validation and configuration state (protected)
private boolean siblingSatisfied; // is there a JSF sibling?
private int requiresIdCount; // nested count
private StringBuffer requiresIdList; // list of failing tags
private boolean failed;
private ValidatorInfo validatorInfo;
private boolean nestedInNamingContainer;
//*********************************************************************
// Constructor and lifecycle management
/**
* <p>CommandTagParser constructor</p>
*/
public IdTagParserImpl() {
failed = false;
siblingSatisfied = true;
requiresIdCount = 0;
requiresIdList = new StringBuffer();
}
/**
* <p>Set the validator info object that has the current tag
* information</p>
*
* @param validatorInfo object with current tag info
*/
public void setValidatorInfo(ValidatorInfo validatorInfo) {
this.validatorInfo = validatorInfo;
}
/**
* <p>Get the failure message</p>
*
* @return String Failure message
*/
public String getMessage() {
Object[] obj = new Object[1];
obj[0] = requiresIdList;
ResourceBundle rb = ResourceBundle.getBundle(
RIConstants.TLV_RESOURCE_LOCATION);
return MessageFormat.format(rb.getString("TLV_ID_ERROR"), obj);
}
/**
* <p>Return false if validator conditions have not been met</p>
*
* @return boolean false if validation conditions have not been met
*/
public boolean hasFailed() {
return failed;
}
/**
* <p>Parse the starting element. If it is a specific JSTL tag
* make sure that the nested JSF tags have IDs. </p>
*/
public void parseStartElement() {
String ns = validatorInfo.getNameSpace();
String ln = validatorInfo.getLocalName();
String qn = validatorInfo.getQName();
Attributes a = validatorInfo.getAttributes();
FacesValidator validator = validatorInfo.getValidator();
if (isNamingContainerTag(validator, ns, ln)) {
nestedInNamingContainer = true;
} else if ((ns.equals(RIConstants.HTML_NAMESPACE)) &&
(requiresIdCount > 0)) {
//make sure that id is present in attributes
if ((!(nestedInNamingContainer)) && (!hasIdAttribute(a))) {
//add to list of jsf tags for error report
failed = true;
requiresIdList.append(qn).append(' ');
}
} else if ((requiresIdCount == 0) &&
(!siblingSatisfied)) {
//make sure jsf sibling has an id
if (((ns.equals(RIConstants.HTML_NAMESPACE)) ||
(ns.equals(RIConstants.CORE_NAMESPACE))) &&
(!hasIdAttribute(a)) && (!(nestedInNamingContainer))) {
//add to list of jsf tags for error report
failed = true;
requiresIdList.append(qn).append(' ');
}
siblingSatisfied = true;
} else if (requiresIdCount == 0) {
// sibling is a non-JSF tag
// JSF tags no longer need id's
siblingSatisfied = true;
}
}
/**
* <p>Parse the ending element. If it is a specific JSTL tag
* make sure that the appropriate flags are set.</p>
*/
public void parseEndElement() {
String ns = validatorInfo.getNameSpace();
String ln = validatorInfo.getLocalName();
FacesValidator validator = validatorInfo.getValidator();
if (isNamingContainerTag(validator, ns, ln)) {
nestedInNamingContainer = false;
}
}
//*********************************************************************
// Private methods
/**
* <p>Check element to make sure that the id attribute is
* present.</p>
*
* @param a Attribute list
* @return boolean True if id attribute found."id"
*/
private boolean hasIdAttribute(Attributes a) {
for (int i = 0; i < a.getLength(); i++) {
if (a.getQName(i).equals("id")) {
return true;
}
}
return false;
}
/**
* Check to make sure that the element is either a
* form tag or a subview tag.
*
* @param validator Parent validator
* @param ns The Namespace.
* @param ln The Local Name.
* @return boolean True if JSF tag is form or subview
*/
private boolean isNamingContainerTag(FacesValidator validator, String ns, String ln) {
// PENDING (visvan) Handle custom implementations of NamingContainer.
// This requires the compiler to look up a fake Faces environment
// so that we can look up the component class based on what
// getComponentType() returns to detect customer NamingContainer
// components.
if (ns.equals(RIConstants.HTML_NAMESPACE)) {
if (ln.equals(validator.getJSF_FORM_LN())) {
return true;
}
}
if (ns.equals(RIConstants.CORE_NAMESPACE)) {
if (ln.equals(validator.getJSF_SUBVIEW_LN())) {
return true;
}
}
return false;
}
}