Source Code Cross Referenced for PropertyValidation.java in  » Database-DBMS » db-derby-10.2 » org » apache » derby » iapi » services » property » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.iapi.services.property 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:
003:           Derby - Class org.apache.derby.iapi.services.property.PropertyValidation
004:
005:           Licensed to the Apache Software Foundation (ASF) under one or more
006:           contributor license agreements.  See the NOTICE file distributed with
007:           this work for additional information regarding copyright ownership.
008:           The ASF licenses this file to you under the Apache License, Version 2.0
009:           (the "License"); you may not use this file except in compliance with
010:           the License.  You may obtain a copy of the License at
011:
012:              http://www.apache.org/licenses/LICENSE-2.0
013:
014:           Unless required by applicable law or agreed to in writing, software
015:           distributed under the License is distributed on an "AS IS" BASIS,
016:           WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017:           See the License for the specific language governing permissions and
018:           limitations under the License.
019:
020:         */
021:
022:        package org.apache.derby.iapi.services.property;
023:
024:        import org.apache.derby.iapi.reference.Attribute;
025:        import org.apache.derby.iapi.reference.Property;
026:        import org.apache.derby.iapi.reference.SQLState;
027:
028:        import org.apache.derby.iapi.services.property.PropertyUtil;
029:        import org.apache.derby.iapi.error.StandardException;
030:        import org.apache.derby.iapi.services.daemon.Serviceable;
031:        import org.apache.derby.iapi.services.property.PropertySetCallback;
032:        import org.apache.derby.iapi.store.access.TransactionController;
033:        import org.apache.derby.iapi.store.access.conglomerate.TransactionManager;
034:        import java.io.Serializable;
035:        import java.util.Dictionary;
036:        import java.util.Enumeration;
037:        import java.util.Properties;
038:        import java.util.Vector;
039:
040:        public class PropertyValidation implements  PropertyFactory {
041:            private Vector notifyOnSet;
042:
043:            /* Constructors for This class: */
044:            public PropertyValidation() {
045:
046:            }
047:
048:            public Serializable doValidateApplyAndMap(TransactionController tc,
049:                    String key, Serializable value, Dictionary d,
050:                    boolean dbOnlyProperty) throws StandardException {
051:                Serializable mappedValue = null;
052:                if (notifyOnSet != null) {
053:                    synchronized (this ) {
054:
055:                        for (int i = 0; i < notifyOnSet.size(); i++) {
056:                            PropertySetCallback psc = (PropertySetCallback) notifyOnSet
057:                                    .elementAt(i);
058:                            if (!psc.validate(key, value, d))
059:                                continue;
060:
061:                            // if this property should not be used then
062:                            // don't call apply. This depends on where
063:                            // the old value comes from
064:                            // SET_IN_JVM - property will not be used
065:                            // SET_IN_DATABASE - propery will be used
066:                            // SET_IN_APPLICATION - will become SET_IN_DATABASE
067:                            // NOT_SET - will become SET_IN_DATABASE
068:
069:                            if (!dbOnlyProperty && key.startsWith("derby.")) {
070:                                if (PropertyUtil.whereSet(key, d) == PropertyUtil.SET_IN_JVM)
071:                                    continue;
072:                            }
073:
074:                            Serviceable s;
075:                            if ((s = psc.apply(key, value, d)) != null)
076:                                ((TransactionManager) tc).addPostCommitWork(s);
077:                            if (mappedValue == null)
078:                                mappedValue = psc.map(key, value, d);
079:                        }
080:                    }
081:                }
082:                return mappedValue;
083:            }
084:
085:            /**
086:              Call the property set callbacks to map a proposed property value
087:              to a value to save.
088:              <P>
089:              The caller must run this in a block synchronized on this
090:              to serialize validations with changes to the set of
091:              property callbacks
092:             */
093:            public Serializable doMap(String key, Serializable value,
094:                    Dictionary set) throws StandardException {
095:                Serializable mappedValue = null;
096:                if (notifyOnSet != null) {
097:                    for (int i = 0; i < notifyOnSet.size()
098:                            && mappedValue == null; i++) {
099:                        PropertySetCallback psc = (PropertySetCallback) notifyOnSet
100:                                .elementAt(i);
101:                        mappedValue = psc.map(key, value, set);
102:                    }
103:                }
104:
105:                if (mappedValue == null)
106:                    return value;
107:                else
108:                    return mappedValue;
109:            }
110:
111:            public void validateSingleProperty(String key, Serializable value,
112:                    Dictionary set) throws StandardException {
113:                // RESOLVE: log device cannot be changed on the fly right now
114:                if (key.equals(Attribute.LOG_DEVICE)) {
115:                    throw StandardException
116:                            .newException(SQLState.RAWSTORE_CANNOT_CHANGE_LOGDEVICE);
117:                }
118:
119:                if (notifyOnSet != null) {
120:                    for (int i = 0; i < notifyOnSet.size(); i++) {
121:                        PropertySetCallback psc = (PropertySetCallback) notifyOnSet
122:                                .elementAt(i);
123:                        psc.validate(key, value, set);
124:                    }
125:                }
126:            }
127:
128:            public synchronized void addPropertySetNotification(
129:                    PropertySetCallback who) {
130:
131:                if (notifyOnSet == null)
132:                    notifyOnSet = new Vector(1, 1);
133:                notifyOnSet.addElement(who);
134:
135:            }
136:
137:            public synchronized void verifyPropertySet(Properties p,
138:                    Properties ignore) throws StandardException {
139:                for (Enumeration e = p.propertyNames(); e.hasMoreElements();) {
140:                    String pn = (String) e.nextElement();
141:                    //
142:                    //Ignore the ones we are told to ignore.
143:                    if (ignore.getProperty(pn) != null)
144:                        continue;
145:                    Serializable pv = p.getProperty(pn);
146:                    validateSingleProperty(pn, pv, p);
147:                }
148:            }
149:        }
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