org.lushlife.guicexml.internal.xml.XML.java Source code

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Here is the source code for org.lushlife.guicexml.internal.xml.XML.java

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/*
 * Copyright 2010 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
 *
 *     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.lushlife.guicexml.internal.xml;

import java.io.FileNotFoundException;
import java.io.InputStream;
import java.net.UnknownHostException;

import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

/**
 * @author Takeshi Kondo
 */
public class XML {
    public static Element getRootElement(InputStream stream) throws DocumentException {
        try {
            SAXReader saxReader = new SAXReader();
            saxReader.setMergeAdjacentText(true);
            return saxReader.read(stream).getRootElement();
        } catch (DocumentException e) {
            Throwable nested = e.getNestedException();
            if (nested != null) {
                if (nested instanceof FileNotFoundException) {
                    throw new RuntimeException("Can't find schema/DTD reference: " + nested.getMessage(), e);
                } else if (nested instanceof UnknownHostException) {
                    throw new RuntimeException("Cannot connect to host from schema/DTD reference: "
                            + nested.getMessage() + " - check that your schema/DTD reference is current", e);
                }
            }
            throw e;
        }
    }

}