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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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.fo.properties;
-
- import java.net.URI;
- import java.net.URISyntaxException;
-
- import org.apache.fop.datatypes.URISpecification;
- import org.apache.fop.fo.FObj;
- import org.apache.fop.fo.PropertyList;
- import org.apache.fop.fo.expr.PropertyException;
- import org.apache.fop.util.CompareUtil;
-
- import static org.apache.fop.fo.Constants.PR_X_XML_BASE;
-
- /**
- * Class modeling a property that has a value of type <uri-specification>.
- * The purpose is mainly to support resolution of a specified
- * relative URI against a specified or inherited <code>xml:base</code>
- * during the property refinement stage.
- * If no <code>xml:base</code> has been specified, only the original URI, as
- * it appears in the source document, is stored as the property's specified
- * value.
- */
- public class URIProperty extends Property {
-
- /** will be null if the URI is not resolved against an xml:base */
- private URI resolvedURI;
-
- /**
- * Default constructor, to create a {@link URIProperty} from a
- * {@code java.net.URI} directly.
- * @param uri a resolved {@code java.net.URI}
- */
- protected URIProperty(URI uri) {
- this.resolvedURI = uri;
- }
-
- /**
- * Alternate constructor, to create a {@link URIProperty} from a
- * string representation.
- * @param uri a {@code java.lang.String} representing the URI
- * @param resolve flag indicating whether this URI was the result of resolution
- * @throws IllegalArgumentException if the URI should be resolved, but is not valid.
- */
- private URIProperty(String uri, boolean resolve) {
- if (resolve && !(uri == null || "".equals(uri))) {
- this.resolvedURI = URI.create(uri);
- } else {
- setSpecifiedValue(uri);
- }
- }
-
- /**
- * Return a string representing the resolved URI, or the
- * specified value if the URI is not resolved against
- * an <code>xml:base</code>
- * @return a string representing the URI
- */
- @Override
- public String getString() {
- if (resolvedURI == null) {
- return getSpecifiedValue();
- } else {
- return resolvedURI.toString();
- }
- }
-
- /** {@inheritDoc} */
- @Override
- public String toString() {
- return this.getString();
- }
-
- /**
- * Inner {@link PropertyMaker} subclass responsible
- * for making instances of this type.
- */
- public static class Maker extends PropertyMaker {
-
- /**
- * Create a maker for the given property id
- *
- * @param propId the id of the property for which a Maker should be created
- */
- public Maker(int propId) {
- super(propId);
- }
-
- /**
- * {@inheritDoc}
- * Check if {@code xml:base} has been specified and whether the
- * given {@code value} represents a relative URI. If so, create
- * a property representing the resolved URI.
- */
- @Override
- public Property make(PropertyList propertyList, String value,
- FObj fo) throws PropertyException {
-
- Property p = null;
- //special treament for data: URIs
- if (value.matches("(?s)^(url\\(('|\")?)?data:.*$")) {
- p = new URIProperty(value, false);
- } else {
- try {
- URI specifiedURI = new URI(URISpecification.escapeURI(value));
- URIProperty xmlBase = (URIProperty)propertyList.get(PR_X_XML_BASE, true, false);
- if (xmlBase == null) {
- //xml:base undefined
- if (this.propId == PR_X_XML_BASE) {
- //if current property is xml:base, define a new one
- p = new URIProperty(specifiedURI);
- p.setSpecifiedValue(value);
- } else {
- //otherwise, just store the specified value (for backward compatibility)
- p = new URIProperty(value, false);
- }
- } else {
- //xml:base defined, so resolve
- p = new URIProperty(xmlBase.resolvedURI.resolve(specifiedURI));
- p.setSpecifiedValue(value);
- }
- } catch (URISyntaxException use) {
- // Let PropertyList propagate the exception
- throw new PropertyException("Invalid URI specified");
- }
- }
- return p;
- }
- }
-
- @Override
- public int hashCode() {
- final int prime = 31;
- int result = 1;
- result = prime * result + CompareUtil.getHashCode(getSpecifiedValue());
- result = prime * result + CompareUtil.getHashCode(resolvedURI);
- return result;
- }
-
- @Override
- public boolean equals(Object obj) {
- if (obj == null) {
- return false;
- }
- if (!(obj instanceof URIProperty)) {
- return false;
- }
- URIProperty other = (URIProperty) obj;
- return CompareUtil.equal(getSpecifiedValue(), other.getSpecifiedValue())
- && CompareUtil.equal(resolvedURI, other.resolvedURI);
- }
-
- }
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