org.odftoolkit.odfdom.pkg.rdfa.URIExtractorImpl Maven / Gradle / Ivy

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ODFDOM is an OpenDocument Format (ODF) framework. Its purpose is to provide an easy common way to create, access and manipulate ODF files, without requiring detailed knowledge of the ODF specification. It is designed to provide the ODF developer community with an easy lightwork programming API portable to any object-oriented language. The current reference implementation is written in Java.
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 * Copyright 2008, 2010 Oracle and/or its affiliates. All rights reserved.
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 * Use is subject to license terms.
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 * Licensed 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. You can also
 * obtain a copy of the License at http://odftoolkit.org/docs/license.txt
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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package org.odftoolkit.odfdom.pkg.rdfa;

import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.xml.namespace.QName;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.StartElement;
import net.rootdev.javardfa.Constants;
import net.rootdev.javardfa.Resolver;
import net.rootdev.javardfa.Setting;
import org.apache.commons.validator.routines.UrlValidator;

/**
 * URIExtractorImpl modified from net.rootdev.javardfa.uri.URIExtractor
 */
class URIExtractorImpl implements URIExtractor {
	private Set settings;
	private final Resolver resolver;
	private Map xmlnsMap = Collections.EMPTY_MAP;
	private boolean isForSAX;
	private UrlValidator urlValidator;

	public URIExtractorImpl(Resolver resolver, boolean isForSAX) {
		this.resolver = resolver;
		this.isForSAX = isForSAX;
		this.urlValidator = new UrlValidator();
	}

	public void setForSAX(boolean isForSAX) {
		this.isForSAX = isForSAX;
	}

	public void setSettings(Set settings) {
		this.settings = settings;
	}

	public String getURI(StartElement element, Attribute attr,
			EvalContext context) {
		QName attrName = attr.getName();
		if (Util.qNameEquals(attrName, Constants.about)) // Safe CURIE or URI
		{
			return expandSafeCURIE(element, attr.getValue(), context);
		}
		if (Util.qNameEquals(attrName, Constants.datatype)) // A CURIE
		{
			return expandCURIE(element, attr.getValue(), context);
		}
		throw new RuntimeException("Unexpected attribute: " + attr);
	}

	private boolean isValidURI(String uri){
		return this.urlValidator.isValid(uri);
	}

	public List getURIs(StartElement element, Attribute attr,
			EvalContext context) {

		List uris = new LinkedList();

		String[] curies = attr.getValue().split("\\s+");
		boolean permitReserved = Util
				.qNameEquals(Constants.rel, attr.getName())
				|| Util.qNameEquals(Constants.rev, attr.getName());
		for (String curie : curies) {
			if (Constants.SpecialRels.contains(curie.toLowerCase())) {
				if (permitReserved)
					uris.add("http://www.w3.org/1999/xhtml/vocab#"
							+ curie.toLowerCase());
			} else {
				String uri = expandCURIE(element, curie, context);
				if (uri != null) {
					uris.add(uri);
				}
			}
		}
		return uris;
	}

	public String expandCURIE(StartElement element, String value,
			EvalContext context) {

		if (value.startsWith("_:")) {
			if (!settings.contains(Setting.ManualNamespaces))
				return value;
			if (element.getNamespaceURI("_") == null)
				return value;
		}
		if (settings.contains(Setting.FormMode) && // variable
				value.startsWith("?")) {
			return value;
		}
		int offset = value.indexOf(":") + 1;
		if (offset == 0) {
			return null;
		}
		String prefix = value.substring(0, offset - 1);


		// Apparently these are not allowed to expand
		if ("xml".equals(prefix) || "xmlns".equals(prefix))
			return null;

		String namespaceURI = null;
		if (prefix.length() == 0) {
			namespaceURI = "http://www.w3.org/1999/xhtml/vocab#";
		} else {
			namespaceURI = element.getNamespaceURI(prefix);
			if (isForSAX) {
				if (namespaceURI != null) {
					if (xmlnsMap == Collections.EMPTY_MAP)
						xmlnsMap = new HashMap();
					xmlnsMap.put(prefix, namespaceURI);
				}
			} else {
				if (namespaceURI == null) {
					namespaceURI = xmlnsMap.get(prefix);
				}
			}
		}
		if (namespaceURI == null) {
			return null;
			// throw new RuntimeException("Unknown prefix: " + prefix);
		}

		return namespaceURI + value.substring(offset);
	}

    @Override
	public String expandSafeCURIE(StartElement element, String value,
			EvalContext context) {
		if (value.startsWith("[") && value.endsWith("]")) {
			return expandCURIE(element, value.substring(1, value.length() - 1),
					context);
		} else {
			if (value.length() == 0) {
				return context.getBase();
			}

			if (settings.contains(Setting.FormMode) && value.startsWith("?")) {
				return value;
			}

			// earlier "return resolver.resolve(context.getBase(), value);"
            // now has JENA problem with '/' slash as base URL
            //  Code: 57/REQUIRED_COMPONENT_MISSING in SCHEME: A component that is required by the scheme is missing.
            return value;
		}
	}

	public String resolveURI(String uri, EvalContext context) {
		return resolver.resolve(context.getBase(), uri);
	}

	public String getNamespaceURI(String prefix) {
		if (xmlnsMap.containsKey(prefix)) {
			return xmlnsMap.get(prefix);
		} else {
			return null;
		}
	}

	public void setNamespaceURI(String prefix, String namespaceURI){
		if (xmlnsMap == Collections.EMPTY_MAP)
			xmlnsMap = new HashMap();
		xmlnsMap.put(prefix, namespaceURI);
	}

}

/*
 * (c) Copyright 2009 University of Bristol All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer. 2. Redistributions in
 * binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other
 * materials provided with the distribution. 3. The name of the author may not
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */