/*
 * Copyright 2005-2011 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.wamblee.xmlrouter.impl;

import java.util.logging.Level;
import java.util.logging.Logger;

import javax.xml.transform.dom.DOMSource;

import org.wamblee.xmlrouter.config.DocumentType;

/**
 * Robust document type provides robustness towards externally provided document
 * types.
 * 
 * @author Erik Brakkee
 * 
 */
public class RobustDocumentType extends RobustIdentifiable<DocumentType>
    implements DocumentType {

    private static final Logger LOGGER = Logger
        .getLogger(RobustDocumentType.class.getName());

    private DocumentType type;

    /**
     * Constructs the wrapper.
     * 
     * @param aId
     *            Id.
     * @param aType
     *            Document type to wrap.
     */
    public RobustDocumentType(String aPrefix, DocumentType aType) {
        super(aPrefix, aType);
        type = aType;
    }

    @Override
    public String getName() {
        try {
            String name = type.getName();
            if (name == null) {
                LOGGER.log(Level.WARNING, "Document type " + getId() +
                    " returned null for name");
                return Constants.UNKNOWN_DOCUMENT_TYPE.toString();
            }
            return name;
        } catch (Exception e) {
            LOGGER.log(Level.WARNING, "Document type " + getId() +
                " threw exception", e);
            return Constants.UNKNOWN_DOCUMENT_TYPE.toString();
        }
    }

    @Override
    public boolean isInstance(DOMSource aSource) {
        try {
            return type.isInstance(aSource);
        } catch (Exception e) {
            LOGGER.log(Level.WARNING, "Document type " + getId() +
                " threw exception", e);
            return false;
        }
    }

    @Override
    public boolean validate(DOMSource aSource) {
        try {
            return type.validate(aSource);
        } catch (Exception e) {
            LOGGER.log(Level.WARNING, "Document type " + getId() +
                " threw exception", e);
            return false;
        }
    }
}