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Apache CXF Woodstox/MSV Schema Validation

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.cxf.wstx_msv_validation;

import java.io.IOException;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.w3c.dom.ls.LSInput;
import org.w3c.dom.ls.LSResourceResolver;

import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;

import com.sun.msv.reader.GrammarReaderController2;
import com.sun.msv.reader.xmlschema.DOMLSInputImpl;

import org.apache.cxf.common.logging.LogUtils;

/**
 * Catch error messages and resolve schema locations.
 */
public class ResolvingGrammarReaderController implements GrammarReaderController2, LSResourceResolver {
    private static final Logger LOG = LogUtils.getL7dLogger(ResolvingGrammarReaderController.class);

    private Map sources;

    private String baseURI;

    public ResolvingGrammarReaderController(String baseURI, Map sources) {
        this.baseURI = baseURI;
        this.sources = sources;
    }

    public void error(Locator[] locs, String msg, Exception nestedException) {
        /* perhaps throw ? */
        LOG.log(Level.SEVERE, msg, nestedException);
        for (Locator loc : locs) {
            LOG.severe("in " + loc.getSystemId() + " " + loc.getLineNumber() + ":" + loc.getColumnNumber());
        }
    }

    public void warning(Locator[] locs, String errorMessage) {
        LOG.log(Level.WARNING, errorMessage);
        for (Locator loc : locs) {
            LOG.warning("in " + loc.getSystemId() + " " + loc.getLineNumber() + ":" + loc.getColumnNumber());
        }

    }

    public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
        return null;
    }

    public LSResourceResolver getLSResourceResolver() {
        return this;
    }

    public LSInput resolveResource(String type, String namespaceURI, String publicId, String systemId,
                                   String resolveBaseURI) {
        EmbeddedSchema embeddedSchema = sources.get(namespaceURI);
        if (embeddedSchema != null) {
            return new DOMLSInputImpl(this.baseURI, embeddedSchema.getSystemId(), embeddedSchema
                .getSchemaElement());
        } else {
            return null;
        }
    }
}