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Classes, interfaces and enums that assist with everyday Java development tasks.

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/*
 * Copyright 2010-2012 Craig S. Dickson (http://craigsdickson.com)
 *
 * 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 com.squeakysand.commons.xml;

import java.io.IOException;
import java.io.InputStream;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;

public final class DomHelper {

    private static final Logger LOG = LoggerFactory.getLogger(DomHelper.class);

    private DomHelper() {
    }

    public static Document parse(InputStream xmlInputStream) throws XmlProcessingException {
        if (xmlInputStream == null) {
            throw new IllegalArgumentException("xmlInputStream cannot be null");
        }
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        dbf.setNamespaceAware(true);
        DocumentBuilder db;
        try {
            db = dbf.newDocumentBuilder();
        } catch (ParserConfigurationException e) {
            throw new XmlProcessingException(e);
        }
        Document result;
        try {
            result = db.parse(xmlInputStream);
        } catch (SAXException e) {
            throw new XmlProcessingException(e);
        } catch (IOException e) {
            throw new XmlProcessingException(e);
        }
        LOG.debug("result is {}:{}", result.getNamespaceURI(), result.getDocumentElement().getLocalName());
        return result;
    }
}