UppercasingContentHandler.java

/*
 * 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.tika.sax;

import java.util.Locale;

import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;

/**
 * A ContentHandler decorator that converts all character content to uppercase.
 * Used for testing custom ContentHandlerFactory configurations.
 */
public class UppercasingContentHandler implements ContentHandler {

    private final ContentHandler delegate;

    public UppercasingContentHandler(ContentHandler delegate) {
        this.delegate = delegate;
    }

    @Override
    public void setDocumentLocator(Locator locator) {
        delegate.setDocumentLocator(locator);
    }

    @Override
    public void startDocument() throws SAXException {
        delegate.startDocument();
    }

    @Override
    public void endDocument() throws SAXException {
        delegate.endDocument();
    }

    @Override
    public void startPrefixMapping(String prefix, String uri) throws SAXException {
        delegate.startPrefixMapping(prefix, uri);
    }

    @Override
    public void endPrefixMapping(String prefix) throws SAXException {
        delegate.endPrefixMapping(prefix);
    }

    @Override
    public void startElement(String uri, String localName, String qName, Attributes atts)
            throws SAXException {
        delegate.startElement(uri, localName, qName, atts);
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        delegate.endElement(uri, localName, qName);
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        // Convert characters to uppercase
        char[] upper = new String(ch, start, length).toUpperCase(Locale.ROOT).toCharArray();
        delegate.characters(upper, 0, upper.length);
    }

    @Override
    public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
        delegate.ignorableWhitespace(ch, start, length);
    }

    @Override
    public void processingInstruction(String target, String data) throws SAXException {
        delegate.processingInstruction(target, data);
    }

    @Override
    public void skippedEntity(String name) throws SAXException {
        delegate.skippedEntity(name);
    }

    /**
     * Returns the underlying delegate handler's string representation,
     * which typically contains the extracted content.
     */
    @Override
    public String toString() {
        return delegate.toString();
    }
}