org.apache.ode.utils.xml.capture.Tracker.java Source code

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Here is the source code for org.apache.ode.utils.xml.capture.Tracker.java

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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.ode.utils.xml.capture;

import java.net.URI;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;

/**
 * Base class for schema-specifc dependency trackers.
 */
public abstract class Tracker implements ContentHandler {
    private static final Log __log = LogFactory.getLog(Tracker.class);

    private Set<URI> references_;
    private URI base_;

    public void characters(char ch[], int start, int length) throws SAXException {
    }

    public void endDocument() throws SAXException {
    }

    public void endElement(String uri, String localName, String qName) throws SAXException {
    }

    public void endPrefixMapping(String prefix) throws SAXException {
    }

    public void ignorableWhitespace(char ch[], int start, int length) throws SAXException {
    }

    public void processingInstruction(String target, String data) throws SAXException {
    }

    public void setDocumentLocator(Locator locator) {
    }

    public void skippedEntity(String name) throws SAXException {
    }

    public void startDocument() throws SAXException {
    }

    public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
    }

    public void startPrefixMapping(String prefix, String uri) throws SAXException {
    }

    protected void addReference(URI ref) {
        if (references_.contains(ref)) {
            return;
        }

        if (__log.isDebugEnabled()) {
            __log.debug("added reference " + ref + " (base is " + base_ + ")");
        }

        references_.add(ref);
    }

    protected void addReference(String schemaLoc) {
        if (schemaLoc == null) {
            return;
        }

        addReference(base_.resolve(schemaLoc));
    }

    protected URI getBase() {
        return base_;
    }

    public Set<URI> getReferences() {
        return references_;
    }

    void init(URI base, Set<URI> references) {
        base_ = base;
        references_ = references;
    }

}