org.eclipse.smila.search.CoreSchemaResolver.java Source code

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Here is the source code for org.eclipse.smila.search.CoreSchemaResolver.java

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/***********************************************************************************************************************
 * Copyright (c) 2008 empolis GmbH and brox IT Solutions GmbH. All rights reserved. This program and the accompanying
 * materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: August Georg Schmidt (brox IT Solutions GmbH) - initial API and implementation
 **********************************************************************************************************************/
package org.eclipse.smila.search;

import java.io.File;
import java.io.FileInputStream;
import java.util.HashSet;
import java.util.Set;

import org.apache.commons.io.IOUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.smila.utils.config.ConfigUtils;
import org.eclipse.smila.utils.xml.SchemaResolver;

/**
 * @author August Georg Schmidt (BROX)
 * 
 */
public class CoreSchemaResolver implements SchemaResolver, ICoreSchemaResolver {

    private static final String[] KNOWN_SCHEMAS = { "ParameterDescriptions.xsd", "ParameterSet.xsd",
            "ParameterDefinition.xsd", "ErrorMessage.xsd", "AnyFinderEngineData.xsd", "SearchParameterObjects.xsd",
            "DataDictionaryConfiguration.xsd", "Queue.xsd", "RapidDeployerAdvancedSearchTemplateFields.xsd",
            "RapidDeployerIndexStructure.xsd", "RecordTransformationDefinition.xsd",
            "RecordTransformationProcess.xsd", "RecordTransformationSet.xsd", "SimpleTypeDefs.xsd",
            "AnyFinderDataDictionary.xsd", "AnyFinderSearch.xsd", "FieldTemplates.xsd", "SearchTemplates.xsd",
            "AnyFinderFieldRequest.xsd", "NodeTransformerRegistry.xsd", "HighlightingTransformerRegistry.xsd",
            "TransformerRegistry.xsd" };

    /**
     * {@inheritDoc}
     * 
     * @see org.eclipse.smila.utils.xml.SchemaResolver#getSchemaByName(java.lang.String)
     */
    public byte[] getSchemaByName(final String schemaName) {

        final Log log = LogFactory.getLog(getClass());

        final Set<String> schemas = new HashSet<String>();
        for (final String schema : KNOWN_SCHEMAS) {
            schemas.add("../xml/" + schema);
        }

        if (!schemas.contains(schemaName)) {
            // not responsible for schema loading.
            return null;
        }

        final File folder = ConfigUtils.getConfigFolder(EIFActivator.BUNDLE_NAME, "xml");
        if (folder == null) {
            if (log.isErrorEnabled()) {
                log.error("unable to locate configuration folder [" + EIFActivator.BUNDLE_NAME + "/xml]");
            }
            return null;
        }

        FileInputStream fis = null;
        final String fileName = folder.getPath() + "/" + schemaName;
        try {
            fis = new FileInputStream(fileName);
            final byte[] schema = IOUtils.toByteArray(fis);
            return schema;
        } catch (final Exception exception) {
            if (log.isErrorEnabled()) {
                log.error("unable to read schema file [" + fileName + "]", exception);
            }
            return null;
        } finally {
            IOUtils.closeQuietly(fis);
        }
    }

}