com.qualogy.qafe.bind.io.document.LocalXSDResolver.java Source code

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Here is the source code for com.qualogy.qafe.bind.io.document.LocalXSDResolver.java

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/**
 * Copyright 2008-2015 Qualogy Solutions B.V.
 *
 * 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.qualogy.qafe.bind.io.document;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import com.qualogy.qafe.util.io.PropertiesUtils;

public class LocalXSDResolver {

    private static Properties properties;
    private static final String INCLUDE_SCHEMALOCATION = "<xs:include schemaLocation=";
    private static final String INCLUDE_SCHEMALOCATION_END = "\"";
    private static final String INCLUDE_SCHEMALOCATION_CLOSE = "/>";
    private static final String INCLUDE_SCHEMA_OPEN = "<xs:schema";
    private static final String INCLUDE_SCHEMA_END = ">";
    private static final String INCLUDE_SCHEMA_CLOSE = "</xs:schema>";

    public LocalXSDResolver() {
        try {
            properties = PropertiesUtils.loadAllProperties("qafe.schemas");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public InputStream resolveToLocalXSDs(InputStream is) {
        String resolvedXSD = streamToString(is);
        List<IncludeSchemaToReplace> includeSchemaToReplaces = findIncludeSchemaToReplace(resolvedXSD, 0);
        while (includeSchemaToReplaces.size() > 0) {
            resolvedXSD = mergeIncludes(resolvedXSD, includeSchemaToReplaces);
            includeSchemaToReplaces = findIncludeSchemaToReplace(resolvedXSD, 0);
        }
        return stringToStream(resolvedXSD);
    }

    private String mergeIncludes(String xsdWithIncludes, List<IncludeSchemaToReplace> includeSchemaToReplaces) {
        String xsdWithoutIncludes = xsdWithIncludes;
        for (IncludeSchemaToReplace includeSchemaToReplace : includeSchemaToReplaces) {
            xsdWithoutIncludes = StringUtils.replace(xsdWithoutIncludes, includeSchemaToReplace.includeToReplace,
                    includeSchemaToReplace.includeXSD);
        }
        return xsdWithoutIncludes;
    }

    private List<IncludeSchemaToReplace> findIncludeSchemaToReplace(String xsdString, int startFrom) {
        List<IncludeSchemaToReplace> includeSchemaToReplaces = new ArrayList<IncludeSchemaToReplace>();
        int nextStart = startFrom;
        while (nextStart > -1) {
            nextStart = xsdString.indexOf(INCLUDE_SCHEMALOCATION, nextStart);
            if (nextStart > -1) {
                int sIndex = nextStart + INCLUDE_SCHEMALOCATION.length() + 1;
                int eIndex = xsdString.indexOf(INCLUDE_SCHEMALOCATION_END, sIndex);
                String locationKey = xsdString.substring(sIndex, eIndex);
                String locationValue = properties.getProperty(locationKey);
                String includeXSD = getXSDBodyToInclude(locationValue);
                int closeIndex = xsdString.indexOf(INCLUDE_SCHEMALOCATION_CLOSE, eIndex);
                String includeToReplace = xsdString.substring(nextStart,
                        (closeIndex + INCLUDE_SCHEMALOCATION_CLOSE.length()));
                IncludeSchemaToReplace includeSchemaToReplace = new IncludeSchemaToReplace(includeToReplace,
                        includeXSD);
                includeSchemaToReplaces.add(includeSchemaToReplace);
                nextStart += INCLUDE_SCHEMALOCATION.length();
            }
        }
        return includeSchemaToReplaces;
    }

    private String getXSDBodyToInclude(String resourceName) {
        InputStream is = DocumentLoader.getContextClassLoader().getResourceAsStream(resourceName);
        String result = streamToString(is);
        int sIndex = result.indexOf(INCLUDE_SCHEMA_OPEN);
        sIndex = result.indexOf(INCLUDE_SCHEMA_END, sIndex) + 1;
        int eIndex = result.indexOf(INCLUDE_SCHEMA_CLOSE);
        result = result.substring(sIndex, eIndex);
        return result;
    }

    private String streamToString(InputStream inputStream) {
        String result = null;
        try {
            result = IOUtils.toString(inputStream, "UTF-8");
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
        return result;
    }

    private InputStream stringToStream(String string) {
        InputStream result = null;
        try {
            result = IOUtils.toInputStream(string, "UTF-8");
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
        return result;
    }

    private class IncludeSchemaToReplace {
        String includeXSD;
        String includeToReplace;

        public IncludeSchemaToReplace(String includeToReplace, String includeXSD) {
            this.includeToReplace = includeToReplace;
            this.includeXSD = includeXSD;
        }
    }

    public static void main(String[] args) {
        try {
            InputStream is = new FileInputStream(
                    "/media/Data/develop/svn/qafe/platform/trunk/qafe-core/src/main/resources/application-context.xsd");
            System.out.print(new LocalXSDResolver().resolveToLocalXSDs(is));
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}