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https://github.com/google/nomulus.git
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c458c05801
The dark lord Gosling designed the Java package naming system so that ownership flows from the DNS system. Since we own the domain name registry.google, it seems only appropriate that we should use google.registry as our package name.
88 lines
3.2 KiB
Java
88 lines
3.2 KiB
Java
// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.xml;
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import static com.google.common.base.Throwables.propagateIfInstanceOf;
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import static com.google.common.base.Verify.verify;
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import static java.nio.charset.StandardCharsets.UTF_8;
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import java.io.ByteArrayOutputStream;
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import java.util.regex.Pattern;
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import javax.annotation.concurrent.NotThreadSafe;
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import javax.xml.bind.JAXBContext;
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import javax.xml.bind.JAXBElement;
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import javax.xml.bind.JAXBException;
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import javax.xml.bind.MarshalException;
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import javax.xml.bind.Marshaller;
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import javax.xml.validation.Schema;
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/** JAXB marshaller for building pieces of XML documents in a single thread. */
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@NotThreadSafe
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public final class XmlFragmentMarshaller {
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private static final Pattern XMLNS_PATTERN = Pattern.compile(" xmlns:\\w+=\"[^\"]+\"");
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private final ByteArrayOutputStream os = new ByteArrayOutputStream();
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private final Marshaller marshaller;
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private final Schema schema;
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XmlFragmentMarshaller(JAXBContext jaxbContext, Schema schema) {
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try {
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marshaller = jaxbContext.createMarshaller();
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marshaller.setProperty(Marshaller.JAXB_ENCODING, UTF_8.toString());
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marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
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marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
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} catch (JAXBException e) {
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throw new RuntimeException(e);
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}
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this.schema = schema;
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}
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/**
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* Turns an individual JAXB element into an XML fragment string.
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*
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* @throws MarshalException if schema validation failed
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*/
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public String marshal(JAXBElement<?> element) throws MarshalException {
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return internalMarshal(element, true);
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}
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/** Turns an individual JAXB element into an XML fragment string. */
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public String marshalLenient(JAXBElement<?> element) {
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try {
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return internalMarshal(element, false);
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} catch (MarshalException e) {
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throw new RuntimeException("MarshalException shouldn't be thrown in lenient mode", e);
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}
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}
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private String internalMarshal(JAXBElement<?> element, boolean strict) throws MarshalException {
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os.reset();
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marshaller.setSchema(strict ? schema : null);
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try {
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marshaller.marshal(element, os);
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} catch (JAXBException e) {
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propagateIfInstanceOf(e, MarshalException.class);
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throw new RuntimeException("Mysterious XML exception", e);
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}
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String fragment = new String(os.toByteArray(), UTF_8);
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int endOfFirstLine = fragment.indexOf(">\n");
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verify(endOfFirstLine > 0, "Bad XML fragment:\n%s", fragment);
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String firstLine = fragment.substring(0, endOfFirstLine + 2);
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String rest = fragment.substring(firstLine.length());
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return XMLNS_PATTERN.matcher(firstLine).replaceAll("") + rest;
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}
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}
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