Source Code Cross Referenced for ClassRuleParameter.java in  » Science » Cougaar12_4 » org » cougaar » planning » ldm » policy » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Science » Cougaar12_4 » org.cougaar.planning.ldm.policy 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * <copyright>
003:         *  
004:         *  Copyright 1997-2004 BBNT Solutions, LLC
005:         *  under sponsorship of the Defense Advanced Research Projects
006:         *  Agency (DARPA).
007:         * 
008:         *  You can redistribute this software and/or modify it under the
009:         *  terms of the Cougaar Open Source License as published on the
010:         *  Cougaar Open Source Website (www.cougaar.org).
011:         * 
012:         *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
013:         *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
014:         *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
015:         *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
016:         *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
017:         *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
018:         *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
019:         *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
020:         *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
021:         *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
022:         *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
023:         *  
024:         * </copyright>
025:         */
026:
027:        package org.cougaar.planning.ldm.policy;
028:
029:        /** 
030:         *
031:         **/
032:
033:        /**
034:         * A ClassRuleParameter is a RuleParameter with specified/protected
035:         * Java interface/class that returns an Class that implements that interface
036:         * or extends that class
037:         */
038:        public class ClassRuleParameter implements  RuleParameter,
039:                java.io.Serializable {
040:            protected String my_name;
041:            protected Class my_interface = Object.class;
042:            protected Class my_value = Object.class;
043:
044:            /**
045:             * Constructor sets class interface and establishes value as not set
046:             */
047:            public ClassRuleParameter(String param_name, Class iface) {
048:                my_interface = iface;
049:                my_value = iface;
050:                my_name = param_name;
051:            }
052:
053:            public ClassRuleParameter(String param_name) {
054:                my_name = param_name;
055:            }
056:
057:            public ClassRuleParameter() {
058:            }
059:
060:            /**
061:             * Parameter type is CLASS
062:             */
063:            public int ParameterType() {
064:                return RuleParameter.CLASS_PARAMETER;
065:            }
066:
067:            public Class getInterface() {
068:                return my_interface;
069:            }
070:
071:            public void setInterface(Class iface) {
072:                my_interface = iface;
073:            }
074:
075:            public void setInterface(String iface) {
076:                try {
077:                    my_interface = Class.forName(iface);
078:                } catch (Exception e) {
079:                    System.out.println("Couldn't create class " + iface + e);
080:                }
081:            }
082:
083:            public String getName() {
084:                return my_name;
085:            }
086:
087:            public void setName(String name) {
088:                my_name = name;
089:            }
090:
091:            /**
092:             * Get parameter value (Class)
093:             * @return Object parameter value (Class). Note : could be null.
094:             */
095:            public Object getValue() {
096:                return my_value;
097:            }
098:
099:            public void setValue(String iface) {
100:                try {
101:                    my_interface = Class.forName(iface);
102:                } catch (Exception e) {
103:                    System.out.println("Couldn't create class " + iface + e);
104:                }
105:            }
106:
107:            /**
108:             * Set parameter value
109:             * @param new_value : must be Class that implements/extends 
110:             * given class
111:             * @throws RuleParameterIllegalValueException
112:             */
113:            public void setValue(Object new_value)
114:                    throws RuleParameterIllegalValueException {
115:                boolean success = false;
116:                if (new_value instanceof  Class) {
117:                    Class new_class = (Class) new_value;
118:                    if (my_interface.isAssignableFrom(new_class)) {
119:                        my_value = new_class;
120:                        success = true;
121:                    }
122:                }
123:                if (!success)
124:                    throw new RuleParameterIllegalValueException(
125:                            RuleParameter.CLASS_PARAMETER,
126:                            "Class must extend/implement " + my_interface);
127:            }
128:
129:            /**
130:             * @param test_value : must be Class
131:             * @return true if Object isAssignableFrom Class specified in constructor,
132:             * false otherwise
133:             */
134:            public boolean inRange(Object test_value) {
135:                if (test_value instanceof  Class) {
136:                    Class new_class = (Class) test_value;
137:                    if (my_interface.isAssignableFrom(new_class)) {
138:                        return true;
139:                    }
140:                }
141:                return false;
142:            }
143:
144:            public String toString() {
145:                return "#<CLASS_PARAMETER : " + my_value + " [" + my_interface
146:                        + "] >";
147:            }
148:
149:            public Object clone() {
150:                ClassRuleParameter crp = new ClassRuleParameter(my_name,
151:                        my_interface);
152:                try {
153:                    crp.setValue(my_value);
154:                } catch (RuleParameterIllegalValueException rpive) {
155:                }
156:                return crp;
157:            }
158:
159:            private interface CRP_Interface {
160:            }
161:
162:            private class CRP_Derived implements  CRP_Interface {
163:            }
164:
165:            public static void Test() {
166:                ClassRuleParameter crp = new ClassRuleParameter(
167:                        "testClassParam", CRP_Interface.class);
168:
169:                if (crp.getValue() != null) {
170:                    System.out
171:                            .println("Error : Parameter not initialized to null");
172:                }
173:
174:                try {
175:                    crp.setValue(Integer.class);
176:                    System.out.println("Error detecting illegal set condition");
177:                } catch (RuleParameterIllegalValueException rpive) {
178:                }
179:
180:                try {
181:                    crp.setValue(CRP_Derived.class);
182:                } catch (RuleParameterIllegalValueException rpive) {
183:                    System.out.println("Error detecting legal set condition");
184:                }
185:
186:                if (crp.getValue() != CRP_Derived.class) {
187:                    System.out.println("Error retrieving value of parameter");
188:                }
189:
190:                System.out.println("CRP = " + crp);
191:                System.out.println("ClassRuleParameter test complete.");
192:
193:            }
194:        }
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