/*
 * 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.openjpa.persistence.jdbc.sqlcache;

import java.util.List;
import java.util.Map;

import junit.framework.TestCase;

import org.apache.openjpa.jdbc.kernel.PreparedQueryCacheImpl;
import org.apache.openjpa.jdbc.kernel.PreparedQueryImpl;
import org.apache.openjpa.kernel.PreparedQuery;
import org.apache.openjpa.kernel.PreparedQueryCache;

/**
 * Test exclusion patterns of PreparedQueryCache in isolation.
 * 
 * @author Pinaki Poddar
 *
 */
public class TestPreparedQueryCacheExclusion extends TestCase {
	private PreparedQueryCache cache;
	private String[] keys   = {"jpql1", "jpql2", "jpql3"};
	private String[] values = {"sql1", "sql2", "sql3"};
	
	protected void setUp() throws Exception {
		super.setUp();
		cache = new PreparedQueryCacheImpl();
		for (int i = 0; i < keys.length; i++) {
            PreparedQuery p = new PreparedQueryImpl(keys[i], values[i], null);
			cache.cache(p);
		}
	}

	protected void tearDown() throws Exception {
		super.tearDown();
	}
	
	public void testExclusionPatternsAreSet() {
		String excludes = "a;b;c";
		cache.setExcludes(excludes);
		assertEquals(3, cache.getExcludes().size());
		assertNotNull(cache.isExcluded("a"));
		assertNotNull(cache.isExcluded("b"));
		assertNotNull(cache.isExcluded("c"));
		assertNull(cache.isExcluded("d"));
		
		List<PreparedQueryCache.Exclusion> exclusions = cache.getExcludes();
		for (PreparedQueryCache.Exclusion e : exclusions)
		    System.err.println(e);
	}

	public void testCachePopulationSetUp() {
		assertContent(keys, values);
	}
	
	public void testAddExclusionPatternDisallowsCacheing() {
		int EXCLUDED = 1;
		cache.addExclusionPattern(keys[EXCLUDED]);
		
        PreparedQuery p = new PreparedQueryImpl(keys[EXCLUDED],
                values[EXCLUDED], null);
        assertFalse("Must not cache excluded key " + keys[EXCLUDED],
                cache.cache(p));
	}

	public void testAddExclusionPatternMakesExistingEntryInvalid() {
		int EXCLUDED = 1;
		cache.addExclusionPattern(keys[EXCLUDED]);
		Map<String, String> view = cache.getMapView();
		for (int i = 0; i < keys.length; i++) {
			if (i == EXCLUDED) {
				assertFalse(view.containsKey(keys[i]));
				assertFalse(view.containsValue(values[i]));
			} else {
				assertTrue(view.containsKey(keys[i]));
				assertTrue(view.containsValue(values[i]));
			}
		}
	}
	
	public void testRemoveExclusionPatternAllowsCacheing() {
		int EXCLUDED = 1;
		cache.addExclusionPattern(keys[EXCLUDED]);
		
        PreparedQuery p = new PreparedQueryImpl(keys[EXCLUDED],
                values[EXCLUDED], null);
        assertFalse("Must not cache excluded key " + keys[EXCLUDED],
                cache.cache(p));
		
		cache.removeExclusionPattern(keys[EXCLUDED]);
        assertTrue("Must cache remove excluded key " + keys[EXCLUDED],
                cache.cache(p));
	}

	public void testRemoveExclusionPatternDoesNotRemoveUserProhbitedKeys() {
		String USER_MARKED_UNCACHABLE = "[user prohibited]";
		cache.markUncachable(USER_MARKED_UNCACHABLE, 
		        new PreparedQueryCacheImpl.StrongExclusion(USER_MARKED_UNCACHABLE,"for testing"));
		
        PreparedQuery p = new PreparedQueryImpl(USER_MARKED_UNCACHABLE, "xyz",
                null);
		assertFalse("Must not cache user-prohibited key " + 
				USER_MARKED_UNCACHABLE, cache.cache(p));
		
		cache.removeExclusionPattern(USER_MARKED_UNCACHABLE);
        assertFalse("Must not cache user-prohibited key even when removed " +
				USER_MARKED_UNCACHABLE, cache.cache(p));
	}

	void assertContent(String[] keys, String[] values) {
		Map<String, String> view = cache.getMapView();
		for (int i = 0; i < keys.length; i++) {
			assertTrue("key " + keys[i] + " not in " + view, 
					view.containsKey(keys[i]));
			assertTrue("value " + values[i] + " not in " + view,
					view.containsValue(values[i]));
		}
	}
}