Examples of org.apache.xerces.xni.grammars.Grammar

org.apache.xerces.xni.grammars.Grammar
A generic grammar for use in validating XML documents. The Grammar object stores the validation information in a compiled form. Specific subclasses extend this class and "populate" the grammar by compiling the specific syntax (DTD, Schema, etc) into the data structures used by this object.
Note: The Grammar object is not useful as a generic grammar access or query object. In other words, you cannot round-trip specific grammar syntaxes with the compiled grammar information in the Grammar object. You can create equivalent validation rules in your choice of grammar syntax but there is no guarantee that the input and output will be the same.
Right now, this class is largely a shell; eventually, it will be enriched by having more expressive methods added.
will be moved from dtd.Grammar here. @author Jeffrey Rodriguez, IBM @author Eric Ye, IBM @author Andy Clark, IBM @author Neil Graham, IBM @version $Id: Grammar.java 319806 2004-02-24 23:15:58Z mrglavas $

    public void cacheGrammars(String grammarType, Grammar[] grammars) {
        if(!fPoolIsLocked) {
            for (int i = 0; i < grammars.length; i++) {
                if(DEBUG) {
                    System.out.println("CACHED GRAMMAR " + (i+1) ) ;
                    Grammar temp = grammars[i] ;
                    //print(temp.getGrammarDescription());
                }
                putGrammar(grammars[i]);
            }
        }

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                        prev.next = entry.next;
            }
            else {
                fGrammars[index] = entry.next;
            }
                Grammar tempGrammar = entry.grammar;
                entry.grammar = null;
                fGrammarCount--;
                return tempGrammar;
            }
        }

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         *
         * @param gDesc Description of the grammar to be retrieved
         * @return      Grammar corresponding to gDesc, or null if none exists.
         */
        public Grammar retrieveGrammar(XMLGrammarDescription gDesc) {
            Grammar g = super.retrieveGrammar(gDesc);
            if(g != null) return g;
            return fGrammarPool.retrieveGrammar(gDesc);
        } // retrieveGrammar(XMLGrammarDesc):  Grammar

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        public Grammar retrieveGrammar(XMLGrammarDescription desc) {
            if (desc.getGrammarType() == XMLGrammarDescription.XML_SCHEMA) {
                final String tns = ((XMLSchemaDescription) desc).getTargetNamespace();
                if (fGrammarBucket != null) {
                    Grammar grammar = fGrammarBucket.getGrammar(tns);
                    if (grammar != null) {
                        return grammar;
                    }
                }
                if (SchemaSymbols.URI_SCHEMAFORSCHEMA.equals(tns)) {

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        synchronized (fGrammars) {
            clean();
            int hash = hashCode(desc);
            int index = (hash & 0x7FFFFFFF) % fGrammars.length;
            for (Entry entry = fGrammars[index]; entry != null; entry = entry.next) {
                Grammar tempGrammar = (Grammar) entry.grammar.get();
                /** If the soft reference has been cleared, remove this entry from the pool. */
                if (tempGrammar == null) {
                    removeEntry(entry);
                }
                else if ((entry.hash == hash) && equals(entry.desc, desc)) {

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        synchronized (fGrammars) {
            clean();
            int hash = hashCode(desc);
            int index = (hash & 0x7FFFFFFF) % fGrammars.length;
            for (Entry entry = fGrammars[index]; entry != null ; entry = entry.next) {
                Grammar tempGrammar = (Grammar) entry.grammar.get();
                /** If the soft reference has been cleared, remove this entry from the pool. */
                if (tempGrammar == null) {
                    removeEntry(entry);
                }
                else if ((entry.hash == hash) && equals(entry.desc, desc)) {

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        // parse the grammar...


        try {
            if(isDTD) {
                for (i = 0; i < externalDTDs.size(); i++) {
                    Grammar g = preparser.preparseGrammar(XMLGrammarDescription.XML_DTD, stringToXIS((String)externalDTDs.elementAt(i)));
                    // we don't really care about g; grammarPool will take care of everything.
                }
            } else { // must be schemas!
                for (i = 0; i < schemas.size(); i++) {
                    Grammar g = preparser.preparseGrammar(XMLGrammarDescription.XML_SCHEMA, stringToXIS((String)schemas.elementAt(i)));
                    // we don't really care about g; grammarPool will take care of everything.
                }
            }
        } catch (Exception e) {
            e.printStackTrace();

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        public Grammar retrieveGrammar(XMLGrammarDescription desc) {
            if (desc.getGrammarType() == XMLGrammarDescription.XML_SCHEMA) {
                final String tns = ((XMLSchemaDescription) desc).getTargetNamespace();
                if (fGrammarBucket != null) {
                    Grammar grammar = fGrammarBucket.getGrammar(tns);
                    if (grammar != null) {
                        return grammar;
                    }
                }
                if (SchemaSymbols.URI_SCHEMAFORSCHEMA.equals(tns)) {

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    public void cacheGrammars(String grammarType, Grammar[] grammars) {
        if(!fPoolIsLocked) {
          for (int i = 0; i < grammars.length; i++) {
                if(DEBUG) {
                  System.out.println("CACHED GRAMMAR " + (i+1) ) ;
                  Grammar temp = grammars[i] ;
                  //print(temp.getGrammarDescription());
                }
              putGrammar(grammars[i]);
            }
      }

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                        prev.next = entry.next;
        } 
        else {
            fGrammars[index] = entry.next;
        }
            Grammar tempGrammar = entry.grammar;
            entry.grammar = null;
              return tempGrammar;
          }
      }
      return null;

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