Source Code Cross Referenced for PrintStackTraceRule.java in  » Code-Analyzer » hammurapi-3.20.0.3 » org » hammurapi » inspectors » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Code Analyzer » hammurapi 3.20.0.3 » org.hammurapi.inspectors 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Hammurapi
003:         * Automated Java code review system. 
004:         * Copyright (C) 2004  Hammurapi Group
005:         *
006:         * This program is free software; you can redistribute it and/or modify
007:         * it under the terms of the GNU General Public License as published by
008:         * the Free Software Foundation; either version 2 of the License, or
009:         *  (at your option) any later version.
010:         *
011:         * This program is distributed in the hope that it will be useful,
012:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014:         * GNU General Public License for more details.
015:         *
016:         * You should have received a copy of the GNU General Public License
017:         * along with this program; if not, write to the Free Software
018:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
019:         *
020:         * URL: http://www.hammurapi.org
021:         * e-Mail: support@hammurapi.biz
022:         */
023:        package org.hammurapi.inspectors;
024:
025:        import java.util.Stack;
026:
027:        import org.hammurapi.InspectorBase;
028:
029:        import com.pavelvlasov.jsel.JselException;
030:        import com.pavelvlasov.jsel.LanguageElement;
031:        import com.pavelvlasov.jsel.Parameter;
032:        import com.pavelvlasov.jsel.expressions.Dot;
033:        import com.pavelvlasov.jsel.expressions.Expression;
034:        import com.pavelvlasov.jsel.expressions.Ident;
035:        import com.pavelvlasov.jsel.expressions.MethodCall;
036:        import com.pavelvlasov.jsel.statements.Handler;
037:        import com.pavelvlasov.review.SourceMarker;
038:
039:        /**
040:         * ER-069
041:         * Do not use printStackTrace(), use logger(<Message>, <exception>) instead.
042:         * @author  Janos Czako
043:         * @version $Revision: 1.3 $
044:         */
045:        public class PrintStackTraceRule extends InspectorBase {
046:
047:            private static final String PRINTSTACKTRACE_NAME = "printStackTrace(";
048:
049:            /*
050:             * This method can give a bad result only if a block exists inside a
051:             * handler clause and this block hides the exception variable for the 
052:             * handler block.
053:             */
054:
055:            private ThreadLocal handlerStack = new ThreadLocal() {
056:                protected Object initialValue() {
057:                    return new Stack();
058:                }
059:            };
060:
061:            private Stack getHandlerStack() {
062:                return (Stack) handlerStack.get();
063:            }
064:
065:            /**
066:             * Reviews the try blocks, if they contain calls 
067:             * to the method printStackTrace
068:             * 
069:             * @param element the try block to be reviewed.
070:             */
071:            public void visit(Handler element) {
072:                getHandlerStack().push(element.getParameter());
073:            }
074:
075:            public void leave(Handler element) {
076:                getHandlerStack().pop();
077:            }
078:
079:            public void visit(MethodCall methodCall) {
080:                if (methodCall.getParameters().isEmpty()
081:                        || methodCall.getParameters().size() == 1) {
082:                    Stack stack = getHandlerStack();
083:                    if (!stack.isEmpty()) {
084:                        Parameter parameter = (Parameter) stack.peek();
085:                        // e.printStackTrace -> Dot
086:                        if (methodCall.getName() instanceof  Dot) {
087:                            Expression lastOperand = (Expression) methodCall
088:                                    .getName().getOperand(1);
089:                            if ((lastOperand instanceof  Ident)
090:                                    && PRINTSTACKTRACE_NAME
091:                                            .equals(((Ident) lastOperand)
092:                                                    .getText())) {
093:
094:                                Expression firstOperand = (Expression) methodCall
095:                                        .getName().getOperand(0);
096:
097:                                try {
098:                                    if ((firstOperand instanceof  Ident)
099:                                            && ((LanguageElement) methodCall)
100:                                                    .getEnclosingScope()
101:                                                    .getVariableNamespace()
102:                                                    .find(
103:                                                            ((Ident) lastOperand)
104:                                                                    .getText()) == parameter) {
105:                                        context
106:                                                .reportViolation((SourceMarker) methodCall);
107:                                    }
108:                                } catch (JselException e) {
109:                                    context.warn(parameter, e);
110:                                }
111:                            }
112:                        }
113:                    }
114:                }
115:            }
116:
117:            /*
118:             * This way works also in standard situations, but is not so correct,
119:             * like the above implemented one.
120:             */
121:
122:            /****************************************************************** 
123:             public void visit(MethodCall method) {
124:             String methodName = method.getName().toString();
125:             if ( methodName.indexOf(".printStackTrace")>0) {
126:             context.reportViolation(method);
127:             }		
128:             }
129:             *******************************************************************/
130:
131:        }
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