org.springframework.oxm.support.SaxResourceUtils Maven / Gradle / Ivy
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/*
* Copyright 2002-2012 the original author or authors.
*
* 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
*
* https://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.springframework.oxm.support;
import java.io.IOException;
import org.xml.sax.InputSource;
import org.springframework.core.io.Resource;
import org.springframework.lang.Nullable;
/**
* Convenient utility methods for dealing with SAX.
*
* @author Arjen Poutsma
* @author Juergen Hoeller
* @since 3.0
*/
public abstract class SaxResourceUtils {
/**
* Create a SAX {@code InputSource} from the given resource.
* Sets the system identifier to the resource's {@code URL}, if available.
* @param resource the resource
* @return the input source created from the resource
* @throws IOException if an I/O exception occurs
* @see InputSource#setSystemId(String)
* @see #getSystemId(org.springframework.core.io.Resource)
*/
public static InputSource createInputSource(Resource resource) throws IOException {
InputSource inputSource = new InputSource(resource.getInputStream());
inputSource.setSystemId(getSystemId(resource));
return inputSource;
}
/**
* Retrieve the URL from the given resource as System ID.
*
Returns {@code null} if it cannot be opened.
*/
@Nullable
private static String getSystemId(Resource resource) {
try {
return resource.getURI().toString();
}
catch (IOException ex) {
return null;
}
}
}