org.apache.xerces.jaxp.validation.ReadOnlyGrammarPool Maven / Gradle / Ivy

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A slightly adapted version of Xerces 2.11.0 to allow the XMLStringBuffer responsible for XML attribute scanning to start larger and thus avoid extended appending times. The initial buffer size is controlled by settting the system property julielab.xerces.attributebuffersize (also available as constant XMLScanner#ATTRIBUTE_BUFFER_SIZE).

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/*
 * 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.jaxp.validation;

import org.apache.xerces.xni.grammars.Grammar;
import org.apache.xerces.xni.grammars.XMLGrammarDescription;
import org.apache.xerces.xni.grammars.XMLGrammarPool;

/**
 * Filter {@link XMLGrammarPool} that exposes a 
 * read-only view of the underlying pool.
 * 
 * @author Kohsuke Kawaguchi ([email protected])
 * @version $Id: ReadOnlyGrammarPool.java 447235 2006-09-18 05:01:44Z mrglavas $
 */
final class ReadOnlyGrammarPool implements XMLGrammarPool {
    
    private final XMLGrammarPool core;
    
    public ReadOnlyGrammarPool( XMLGrammarPool pool ) {
        this.core = pool;
    }
    
    public void cacheGrammars(String grammarType, Grammar[] grammars) {
        // noop. don't let caching to happen
    }

    public void clear() {
        // noop. cache is read-only.
    }

    public void lockPool() {
        // noop. this pool is always read-only
    }

    public Grammar retrieveGrammar(XMLGrammarDescription desc) {
        return core.retrieveGrammar(desc);
    }

    public Grammar[] retrieveInitialGrammarSet(String grammarType) {
        return core.retrieveInitialGrammarSet(grammarType);
    }

    public void unlockPool() {
        // noop. this pool is always read-only.
    }

} // ReadOnlyGrammarPool