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/*
 * Copyright (c) 1998, 2020 Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 1998, 2020 IBM Corporation and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Oracle - initial API and implementation from Oracle TopLink
//      Gordon Yorke - VM managed entity detachment
//     Eduard Bartsch, SAP - Fix for Bug 351186 - ConcurrentModificationException Exception in PropertiesHandler
//     Rick Curtis - Add support for WebSphere Liberty platform.
//     08/11/2014-2.5 Rick Curtis
//       - 440594: Tolerate invalid NamedQuery at EntityManager creation.
//     09/03/2015 - Will Dazey
//       - 456067 : Added support for defining query timeout units
//     09/28/2015 - Will Dazey
//       - 478331 : Added support for defining local or server as the default locale for obtaining timestamps
//     03/11/2016 - Jody Grassel
//       - 489794 : Add support for WebSphere EJBEmbeddable platform.
//     08/29/2016 Jody Grassel
//       - 500441: Eclipselink core has System.getProperty() calls that are not potentially executed under doPriv()
//     04/11/2018 - Will Dazey
//       - 533148 : Add the eclipselink.jpa.sql-call-deferral property
package org.eclipse.persistence.internal.sessions;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.security.AccessController;
import java.security.PrivilegedAction;

import org.eclipse.persistence.annotations.IdValidation;
import org.eclipse.persistence.config.BatchWriting;
import org.eclipse.persistence.config.CacheType;
import org.eclipse.persistence.config.CommitOrderType;
import org.eclipse.persistence.config.EntityManagerProperties;
import org.eclipse.persistence.config.ExclusiveConnectionMode;
import org.eclipse.persistence.config.FlushClearCache;
import org.eclipse.persistence.config.LoggerType;
import org.eclipse.persistence.config.PersistenceUnitProperties;
import org.eclipse.persistence.config.ReferenceMode;
import org.eclipse.persistence.config.TargetDatabase;
import org.eclipse.persistence.config.TargetServer;
import org.eclipse.persistence.descriptors.DescriptorQueryManager;
import org.eclipse.persistence.internal.localization.ExceptionLocalization;
import org.eclipse.persistence.internal.security.PrivilegedAccessHelper;
import org.eclipse.persistence.internal.security.PrivilegedGetSystemProperty;
import org.eclipse.persistence.logging.SessionLog;
import org.eclipse.persistence.queries.ObjectLevelReadQuery;

/**
 *
 * The class processes some of EclipseLink properties.
 * The class may be used for any properties, but it only makes sense
 * to use it in the following two cases:
 *      1. There is a set of legal values defined
 *          either requiring translation (like CacheTypeProp);
 *          or not (like LoggingLevelProp).
 *      2. Property is really a prefix from which the property obtained by
 *      appending entity or class name (like DescriptorCustomizerProp -
 *      it corresponds to "eclipselink.descriptor.customizer." prefix that allows to
 *      define properties like "eclipselink.descriptor.customizer.myPackage.MyClass").
 *
 * EclipseLink properties and their values defined in org.eclipse.persistence.config package.
 *
 * To add a new property:
 *   Define a new property in PersistenceUnitProperties;
 *   Add a class containing property's values if required to config package (like CacheType);
 *      Alternatively values may be already defined elsewhere (like in LoggingLevelProp).
 *   Add an inner class to this class extending Prop corresponding to the new property (like CacheTypeProp);
 *      The first constructor parameter is property name; the second is default value;
 *      In constructor
 *          provide 2-dimensional value array in case the values should be translated (like CacheTypeProp);
 *              in case translation is not required provide a single-dimension array (like LoggingLevelProp).
 *   In inner class Prop static initializer addProp an instance of the new prop class (like addProp(new CacheTypeProp())).
 *
 * @see PersistenceUnitProperties
 * @see CacheType
 * @see TargetDatabase
 * @see TargetServer
 *
 *  05/28/2008-1.0M8 Andrei Ilitchev.
 *     - 224964: Provide support for Proxy Authentication through JPA.
 *     Added support for CONNECTION_EXCLUSIVE. Also added BooleanProp to allow simpler way of creating boolean-valued properties:
 *     instead of defining a new class for each new Boolean property just add a new instance of BooleanProp with property name and default:
 *           addProp(new BooleanProp(PersistenceUnitProperties.CONNECTION_EXCLUSIVE, "false"));
 *     Changed the existing boolean-valued properties to use this approach, also
 *     applied the same approach to LOGGING_LEVEL and CATEGORY_LOGGING_LEVEL_
 *     Also introduced a new version of getSessionPropertyValue that takes properties:
 *         public static String getSessionPropertyValue(String name, Map m, AbstractSession session) {
 *     it's convenient for use in EntityManagerImpl: first searches the passed properties then (recursively) properties of the session, then System properties.
 */
public class PropertiesHandler {

    /**
     * INTERNAL:
     * Gets property value from the map, if none found looks in System properties.
     * Use this to get a value for a non-prefixed property.
     * Could be used on prefixes (like "org.eclipse.persistence.cache-type.") too,
     * but will always return null
     * Throws IllegalArgumentException in case the property value is illegal.
     */
    public static String getPropertyValue(String name, Map m) {
        return getPropertyValue(name, m, true);
    }

    public static String getPropertyValueLogDebug(String name, Map m, AbstractSession session) {
        return getPropertyValueLogDebug(name, m, session, true);
    }

    public static String getPropertyValue(String name, Map m, boolean useSystemAsDefault) {
        return Prop.getPropertyValueToApply(name, m, null, useSystemAsDefault);
    }

    public static String getPropertyValueLogDebug(String name, Map m, AbstractSession session, boolean useSystemAsDefault) {
        return Prop.getPropertyValueToApply(name, m, session, useSystemAsDefault);
    }

    /**
     * INTERNAL:
     * Given property name and value verifies and translates the value.
     * Throws IllegalArgumentException in case the property value is illegal.
     */
    public static String getPropertyValue(String name, String value) {
        return Prop.getPropertyValueToApply(name, value, null);
    }

    public static String getPropertyValueLogDebug(String name, String value, AbstractSession session) {
        return Prop.getPropertyValueToApply(name, value, session);
    }

    /**
     * INTERNAL:
     * Gets property value from the map, if none found looks in System properties.
     * Use this to get a value for a prefixed property:
     * for "org.eclipse.persistence.cache-type.Employee"
     * pass "org.eclipse.persistence.cache-type.", "Employee".
     * Throws IllegalArgumentException in case the property value is illegal.
     */
    public static String getPrefixedPropertyValue(String prefix, String suffix, Map m) {
        return (String)getPrefixValues(prefix, m).get(suffix);
    }

    /**
     * INTERNAL:
     * Gets properties' values from the map, if none found looks in System properties.
     * In the returned map values keyed by suffixes.
     * Use it with prefixes (like "org.eclipse.persistence.cache-type.").
     * Could be used on simple properties (not prefixes, too),
     * but will always return either an empty map or a map containing a single
     * value keyed by an empty String.
     * Throws IllegalArgumentException in case the property value is illegal.
     */
    public static Map getPrefixValues(String prefix, Map m) {
        return Prop.getPrefixValuesToApply(prefix, m, null, true);
    }

    public static Map getPrefixValuesLogDebug(String prefix, Map m, AbstractSession session) {
        return Prop.getPrefixValuesToApply(prefix, m, session, true);
    }

    /**
     * INTERNAL:
     * Returns the default property value that should be applied.
     * Throws IllegalArgumentException in case the name doesn't correspond
     * to any property.
     */
    public static String getDefaultPropertyValue(String name) {
        return Prop.getDefaultPropertyValueToApply(name, null);
    }

    public static String getDefaultPropertyValueLogDebug(String name, AbstractSession session) {
        return Prop.getDefaultPropertyValueToApply(name, session);
    }

    /**
     * INTERNAL:
     * Empty String value indicates that the default property value should be used.
     */
    protected static boolean shouldUseDefault(String value) {
        return value != null &&  value.length() == 0;
    }

    protected static abstract class Prop {
        static HashMap mainMap = new HashMap();
        Object[] valueArray;
        HashMap valueMap;
        String name;
        String defaultValue;
        String defaultValueToApply;
        boolean valueToApplyMayBeNull;
        boolean shouldReturnOriginalValueIfValueToApplyNotFound;

        static {
            addProp(new LoggerTypeProp());
            addProp(new LoggingLevelProp(PersistenceUnitProperties.LOGGING_LEVEL, Level.INFO.getName()));
            addProp(new LoggingLevelProp(PersistenceUnitProperties.CATEGORY_LOGGING_LEVEL_, Level.INFO.getName()));
            addProp(new TargetDatabaseProp());
            addProp(new TargetServerProp());
            addProp(new CacheSizeProp());
            addProp(new CacheTypeProp());
            addProp(new BooleanProp(PersistenceUnitProperties.CACHE_SHARED_, "false"));
            addProp(new DescriptorCustomizerProp());
            addProp(new BatchWritingProp());
            addProp(new FlushClearCacheProp());
            addProp(new ReferenceModeProp());
            addProp(new FlushModeProp());
            addProp(new BooleanProp(PersistenceUnitProperties.PERSISTENCE_CONTEXT_CLOSE_ON_COMMIT, "false"));
            addProp(new BooleanProp(PersistenceUnitProperties.PERSISTENCE_CONTEXT_PERSIST_ON_COMMIT, "true"));
            addProp(new BooleanProp(PersistenceUnitProperties.PERSISTENCE_CONTEXT_COMMIT_WITHOUT_PERSIST_RULES, "false"));
            addProp(new BooleanProp(PersistenceUnitProperties.VALIDATE_EXISTENCE, "false"));
            addProp(new BooleanProp(PersistenceUnitProperties.ORDER_UPDATES, "true"));
            addProp(new CommitOrderProp());
            addProp(new BooleanProp(PersistenceUnitProperties.JOIN_EXISTING_TRANSACTION, "false"));
            addProp(new BooleanProp(PersistenceUnitProperties.COMPOSITE_UNIT, "false"));
            addProp(new BooleanProp(PersistenceUnitProperties.COMPOSITE_UNIT_MEMBER, "false"));
            addProp(new ExclusiveConnectionModeProp());
            addProp(new BooleanProp(PersistenceUnitProperties.EXCLUSIVE_CONNECTION_IS_LAZY, "true"));
            addProp(new IdValidationProp());
            addProp(new ConnectionPoolProp());
            addProp(new BooleanProp(PersistenceUnitProperties.JDBC_RESULT_SET_ACCESS_OPTIMIZATION, Boolean.toString(ObjectLevelReadQuery.isResultSetAccessOptimizedQueryDefault)));
            addProp(new BooleanProp(PersistenceUnitProperties.JPQL_TOLERATE, "false"));
            addProp(new BooleanProp(PersistenceUnitProperties.MULTITENANT_SHARED_CACHE, "false"));
            addProp(new BooleanProp(PersistenceUnitProperties.MULTITENANT_SHARED_EMF, "true"));
            //Enhancement
            addProp(new QueryTimeoutUnitProp());
            addProp(new PessimisticLockTimeoutUnitProp());
            addProp(new BooleanProp(PersistenceUnitProperties.USE_LOCAL_TIMESTAMP, "false"));
            addProp(new BooleanProp(PersistenceUnitProperties.SQL_CALL_DEFERRAL, "true"));
            addProp(new BooleanProp(PersistenceUnitProperties.NAMING_INTO_INDEXED, "false"));
        }

        Prop(String name) {
            this.name = name;
        }

        Prop(String name, String defaultValue) {
            this(name);
            this.defaultValue = defaultValue;
        }

        static String getPropertyValueFromMap(String name, Map m, boolean useSystemAsDefault) {
            String value = (String)m.get(name);
            if (value == null && useSystemAsDefault) {
                if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()) {
                    value = AccessController.doPrivileged(new PrivilegedGetSystemProperty(name));
                } else {
                    value = System.getProperty(name);
                }
            }

            return value;
        }

        // Collect all entries corresponding to the prefix name.
        // Note that entries from Map m override those from System properties.
        static Map getPrefixValuesFromMap(String name, Map m, boolean useSystemAsDefault) {
            Map mapOut = new HashMap();

            if(useSystemAsDefault) {
                Map.Entry[] entries = (Map.Entry[]) AccessController.doPrivileged(new PrivilegedAction() {
                    public Object run() {
                        return System.getProperties().entrySet().toArray(new Map.Entry[] {});
                        }
                    }
                );

                for (Map.Entry entry:entries) {
                    String str = (String)entry.getKey();
                    if(str.startsWith(name)) {
                        String entityName = str.substring(name.length(), str.length());
                        mapOut.put(entityName, entry.getValue());
                    }
                }
            }

            Iterator it = m.entrySet().iterator();
            while(it.hasNext()) {
                Map.Entry entry = (Map.Entry)it.next();
                String str = (String)entry.getKey();
                if(str.startsWith(name)) {
                    String entityName = str.substring(name.length(), str.length());
                    mapOut.put(entityName, entry.getValue());
                }
            }

            return mapOut;
        }

        static String getPropertyValue(String name, boolean shouldUseDefault, Map m, AbstractSession session, boolean useSystemAsDefault) {
            Prop prop = (Prop)mainMap.get(name);
            if(prop == null) {
                // it's not our property
                return null;
            }
            String value = getPropertyValueFromMap(name, m, useSystemAsDefault);
            if(value == null) {
                return null;
            }
            return prop.getValueToApply(value, shouldUseDefault, session);
        }

        static String getPropertyValueToApply(String name, Map m, AbstractSession session, boolean useSystemAsDefault) {
            Prop prop = (Prop)mainMap.get(name);
            if(prop == null) {
                throw new IllegalArgumentException(name);
            }
            String value = getPropertyValueFromMap(name, m, useSystemAsDefault);
            if(value == null) {
                return null;
            }
            return prop.getValueToApply(value, shouldUseDefault(value), session);
        }

        static String getPropertyValueToApply(String name, String value, AbstractSession session) {
            Prop prop = (Prop)mainMap.get(name);
            if(prop == null) {
                throw new IllegalArgumentException(name);
            }
            return prop.getValueToApply(value, shouldUseDefault(value), session);
        }

        static Map getPrefixValuesToApply(String prefix, Map m, AbstractSession session, boolean useSystemAsDefault) {
            Prop prop = (Prop)mainMap.get(prefix);
            // maps suffixes to property values
            Map mapIn = getPrefixValuesFromMap(prefix, m, useSystemAsDefault);
            if(mapIn.isEmpty()) {
                return mapIn;
            }

            HashMap mapOut = new HashMap(mapIn.size());
            Iterator it = mapIn.entrySet().iterator();
            while(it.hasNext()) {
                Map.Entry entry = (Map.Entry)it.next();
                String suffix = (String)entry.getKey();
                Object value = entry.getValue();
                if ((prop != null) && (value instanceof String)) {
                    value = prop.getValueToApply((String)value, shouldUseDefault((String)value), suffix, session);
                }
                mapOut.put(suffix, value);
            }
            // maps suffixes to valuesToApply
            return mapOut;
        }

        static String getDefaultPropertyValueToApply(String name, AbstractSession session) {
            Prop prop = (Prop)mainMap.get(name);
            if(prop == null) {
                throw new IllegalArgumentException(ExceptionLocalization.buildMessage("ejb30-default-for-unknown-property", new Object[]{name}));
            }
            prop.logDefault(session);
            return prop.defaultValueToApply;
        }

        String getValueToApply(String value, boolean shouldUseDefault, AbstractSession session) {
            return getValueToApply(value, shouldUseDefault, null, session);
        }

        // suffix is used only for properties-prefixes (like CacheType)
        String getValueToApply(String value, boolean shouldUseDefault, String suffix, AbstractSession session) {
            if(shouldUseDefault) {
                logDefault(session, suffix);
                return defaultValueToApply;
            }
            String valueToApply = value;
            if(valueMap != null) {
                String key = getUpperCaseString(value);
                valueToApply = (String)valueMap.get(key);
                if(valueToApply == null) {
                    boolean notFound = true;
                    if(valueToApplyMayBeNull) {
                        notFound = !valueMap.containsKey(key);
                    }
                    if(notFound) {
                        if(shouldReturnOriginalValueIfValueToApplyNotFound) {
                            valueToApply = value;
                        } else {
                            String propertyName = name;
                            if(suffix != null) {
                                propertyName = propertyName + suffix;
                            }
                            throw new IllegalArgumentException(ExceptionLocalization.buildMessage("ejb30-illegal-property-value", new Object[]{propertyName, getPrintValue(value)}));
                        }
                    }
                }
            }
            String logValue = PersistenceUnitProperties.getOverriddenLogStringForProperty(name);
            if (logValue != null){
                log(session, logValue, logValue, suffix);
            } else {
                log(session, value, valueToApply, suffix);
            }
            return valueToApply;
        }

        static String getUpperCaseString(String value) {
            if(value != null) {
                return value.toUpperCase();
            } else {
                return null;
            }
        }
        static String getPrintValue(String value) {
            if(value != null) {
                return value;
            } else {
                return "null";
            }
        }
        void initialize() {
            if(valueArray != null) {
                valueMap = new HashMap(valueArray.length);
                if(valueArray instanceof Object[][]) {
                    Object[][] valueArray2 = (Object[][])valueArray;
                    for(int i=0; i




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