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An XML Schema processor with preliminary support for the W3C XML Schema 1.1
Recommendation (in two parts). This artifact was sourced from the xml-schema-1.1-dev
branch (r1667115) and built using JDK 7. The org.apache.xerces and org.eclipse.wst
packages are relocated to avoid conflicts with other components that depend on the
latest public Xerces release (2.11.0).
The newest version!
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.xerces.impl.xs;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;
/**
* A class used to hold the internal schema grammar set for the current instance
*
* @xerces.internal
*
* @author Sandy Gao, IBM
* @version $Id: XSGrammarBucket.java 1031717 2010-11-05 19:04:41Z sandygao $
*/
public class XSGrammarBucket {
// Data
/**
* Hashtable that maps between Namespace and a Grammar
*/
Hashtable fGrammarRegistry = new Hashtable();
SchemaGrammar fNoNSGrammar = null;
/**
* Get the schema grammar for the specified namespace
*
* @param namespace
* @return SchemaGrammar associated with the namespace
*/
public SchemaGrammar getGrammar(String namespace) {
if (namespace == null)
return fNoNSGrammar;
return (SchemaGrammar)fGrammarRegistry.get(namespace);
}
/**
* Put a schema grammar into the registry
* This method is for internal use only: it assumes that a grammar with
* the same target namespace is not already in the bucket.
*
* @param grammar the grammar to put in the registry
*/
public void putGrammar(SchemaGrammar grammar) {
if (grammar.getTargetNamespace() == null)
fNoNSGrammar = grammar;
else
fGrammarRegistry.put(grammar.getTargetNamespace(), grammar);
}
/**
* put a schema grammar and any grammars imported by it (directly or
* inderectly) into the registry. when a grammar with the same target
* namespace is already in the bucket, and different from the one being
* added, it's an error, and no grammar will be added into the bucket.
*
* @param grammar the grammar to put in the registry
* @param deep whether to add imported grammars
* @return whether the process succeeded
*/
public boolean putGrammar(SchemaGrammar grammar, boolean deep) {
// whether there is one with the same tns
SchemaGrammar sg = getGrammar(grammar.fTargetNamespace);
if (sg != null) {
// if the one we have is different from the one passed, it's an error
return sg == grammar;
}
// not deep import, then just add this one grammar
if (!deep) {
putGrammar(grammar);
return true;
}
// get all imported grammars, and make a copy of the Vector, so that
// we can recursively process the grammars, and add distinct ones
// to the same vector
Vector currGrammars = (Vector)grammar.getImportedGrammars();
if (currGrammars == null) {
putGrammar(grammar);
return true;
}
Vector grammars = ((Vector)currGrammars.clone());
SchemaGrammar sg1, sg2;
Vector gs;
// for all (recursively) imported grammars
for (int i = 0; i < grammars.size(); i++) {
// get the grammar
sg1 = (SchemaGrammar)grammars.elementAt(i);
// check whether the bucket has one with the same tns
sg2 = getGrammar(sg1.fTargetNamespace);
if (sg2 == null) {
// we need to add grammars imported by sg1 too
gs = sg1.getImportedGrammars();
// for all grammars imported by sg2, but not in the vector
// we add them to the vector
if(gs == null) continue;
for (int j = gs.size() - 1; j >= 0; j--) {
sg2 = (SchemaGrammar)gs.elementAt(j);
if (!grammars.contains(sg2))
grammars.addElement(sg2);
}
}
// we found one with the same target namespace
// if the two grammars are not the same object, then it's an error
else if (sg2 != sg1) {
return false;
}
}
// now we have all imported grammars stored in the vector. add them
putGrammar(grammar);
for (int i = grammars.size() - 1; i >= 0; i--)
putGrammar((SchemaGrammar)grammars.elementAt(i));
return true;
}
/**
* put a schema grammar and any grammars imported by it (directly or
* inderectly) into the registry. when a grammar with the same target
* namespace is already in the bucket, and different from the one being
* added, no grammar will be added into the bucket.
*
* @param grammar the grammar to put in the registry
* @param deep whether to add imported grammars
* @param ignoreConflict whether to ignore grammars that already exist in the grammar
* bucket or not - including 'grammar' parameter.
* @return whether the process succeeded
*/
public boolean putGrammar(SchemaGrammar grammar, boolean deep, boolean ignoreConflict) {
if (!ignoreConflict) {
return putGrammar(grammar, deep);
}
// if grammar already exist in the bucket, we ignore the request
SchemaGrammar sg = getGrammar(grammar.fTargetNamespace);
if (sg == null) {
putGrammar(grammar);
}
// not adding the imported grammars
if (!deep) {
return true;
}
// get all imported grammars, and make a copy of the Vector, so that
// we can recursively process the grammars, and add distinct ones
// to the same vector
Vector currGrammars = (Vector)grammar.getImportedGrammars();
if (currGrammars == null) {
return true;
}
Vector grammars = ((Vector)currGrammars.clone());
SchemaGrammar sg1, sg2;
Vector gs;
// for all (recursively) imported grammars
for (int i = 0; i < grammars.size(); i++) {
// get the grammar
sg1 = (SchemaGrammar)grammars.elementAt(i);
// check whether the bucket has one with the same tns
sg2 = getGrammar(sg1.fTargetNamespace);
if (sg2 == null) {
// we need to add grammars imported by sg1 too
gs = sg1.getImportedGrammars();
// for all grammars imported by sg2, but not in the vector
// we add them to the vector
if(gs == null) continue;
for (int j = gs.size() - 1; j >= 0; j--) {
sg2 = (SchemaGrammar)gs.elementAt(j);
if (!grammars.contains(sg2))
grammars.addElement(sg2);
}
}
// we found one with the same target namespace, ignore it
else {
grammars.remove(sg1);
}
}
// now we have all imported grammars stored in the vector. add them
for (int i = grammars.size() - 1; i >= 0; i--) {
putGrammar((SchemaGrammar)grammars.elementAt(i));
}
return true;
}
/**
* get all grammars in the registry
*
* @return an array of SchemaGrammars.
*/
public SchemaGrammar[] getGrammars() {
// get the number of grammars
int count = fGrammarRegistry.size() + (fNoNSGrammar==null ? 0 : 1);
SchemaGrammar[] grammars = new SchemaGrammar[count];
// get grammars with target namespace
Enumeration schemas = fGrammarRegistry.elements();
int i = 0;
while (schemas.hasMoreElements())
grammars[i++] = (SchemaGrammar)schemas.nextElement();
// add the grammar without target namespace, if any
if (fNoNSGrammar != null)
grammars[count-1] = fNoNSGrammar;
return grammars;
}
/**
* Clear the registry.
* REVISIT: update to use another XSGrammarBucket
*/
public void reset() {
fNoNSGrammar = null;
fGrammarRegistry.clear();
}
} // class XSGrammarBucket
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