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/*
 * 
 * Copyright 2003-2004 The Ant-Contrib project
 *
 *  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 net.sf.antcontrib.cpptasks;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import junit.framework.TestCase;
/**
 * Base class for tests on classes that consume or public XML documents.
 * 
 * @author Curt Arnold
 *  
 */
public abstract class TestXMLConsumer extends TestCase {
    /**
     * Loads a TargetHistoryTable from a resource
     * 
     * @param resourceName
     *            resouce name, such as "files/openshore/history.xml".
     * @return TargetHistoryTable
     */
    public static final void copyResourceToTmpDir(String resourceName,
            String tmpFile) throws IOException {
        String tmpDir = System.getProperty("java.io.tmpdir");
        //
        //  attempt to get resource from jar
        //      (should succeed unless testing in IDE)
        InputStream src = null;
        if (TestTargetHistoryTable.class.getClassLoader().getResource(
                resourceName) != null) {
            src = TestTargetHistoryTable.class.getClassLoader()
                    .getResourceAsStream(resourceName);
        }
        //
        //  if not found, try to find it relative to the current directory
        //
        if (src == null) {
            src = new FileInputStream(resourceName);
        }
        assertNotNull("Could not locate resource " + resourceName, src);
        try {
            File destFile = new File(tmpDir, tmpFile);
            FileOutputStream dest = new FileOutputStream(destFile);
            try {
                int bytesRead = 0;
                byte[] buffer = new byte[4096];
                do {
                    bytesRead = src.read(buffer);
                    if (bytesRead > 0) {
                        dest.write(buffer, 0, bytesRead);
                    }
                } while (bytesRead == buffer.length);
            } finally {
                dest.close();
            }
        } finally {
            src.close();
        }
    }
    /**
     * Deletes a file, if it exists, from the user's temporary directory.
     * 
     * @param tmpName
     *            file name, may not be null
     */
    public static void deleteTmpFile(String tmpName) throws IOException {
        String tmpDir = System.getProperty("java.io.tmpdir");
        File tmpFile = new File(tmpDir, tmpName);
        if (tmpFile.exists()) {
            tmpFile.delete();
        }
    }
    /**
     * @param testName
     */
    protected TestXMLConsumer(final String testName) {
        super(testName);
    }
}