TemplateInfoHolder.java

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package com.sun.enterprise.admin.servermgmt.template;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import javax.xml.XMLConstants;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.sax.SAXSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;

import org.xml.sax.InputSource;

import com.sun.enterprise.admin.servermgmt.DomainException;
import com.sun.enterprise.admin.servermgmt.xml.templateinfo.TemplateInfo;
import com.sun.enterprise.universal.i18n.LocalStringsImpl;

public class TemplateInfoHolder {

    private static final LocalStringsImpl _strings = new LocalStringsImpl(TemplateInfoHolder.class);
    //Path where schema resides. 
    private final static String TEMPLATE_INFO_SCHEMA_PATH = "xsd/schema/template-info.xsd";
    private TemplateInfo _templateInfo;
    private String _location;

    public TemplateInfoHolder(InputStream inputSteam, String location)
            throws DomainException {
        try {
            _templateInfo = parse(inputSteam);
        } catch (Exception e) {
            throw new DomainException(_strings.get("failedToParse", TEMPLATE_INFO_SCHEMA_PATH));
        }
        _location = location;
    }

    public TemplateInfo getTemplateInfo() {
        return _templateInfo;
    }

    public String getLocation() {
        return _location;
    }

    /**
     * Parse the configuration stream against the template-info schema.
     *
     * @param configStream InputStream of template-info.xml file.
     * @return Parsed Object.
     * @throws Exception If any error occurs in parsing.
     */
    @SuppressWarnings("rawtypes")
    private TemplateInfo parse(InputStream configStream)
            throws Exception {
        if (configStream == null) {
            throw new DomainException("Invalid stream");
        }
        try {
            URL schemaUrl = getClass().getClassLoader().getResource(TEMPLATE_INFO_SCHEMA_PATH);
            JAXBContext context = JAXBContext.newInstance(TemplateInfo.class.getPackage().getName());
            Unmarshaller unmarshaller = context.createUnmarshaller();
            SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
            Schema schema = schemaFactory.newSchema(schemaUrl);
            unmarshaller.setSchema(schema);
            InputSource is = new InputSource(configStream);
            SAXSource source = new SAXSource(is);
            Object obj = unmarshaller.unmarshal(source);
            return obj instanceof JAXBElement ? (TemplateInfo)(((JAXBElement) obj).getValue()) : (TemplateInfo) obj;
        }
        finally {
            try {
                configStream.close();
                configStream = null;
            } catch(IOException e)
            { /** Ignore */ }
        }
    }
}