notesuppressedwarnings.java

一个查找java程序里bug的程序的源代码,该程序本身也是java写的,对提高java编程水平很有用

/*
 * FindBugs - Find bugs in Java programs
 * Copyright (C) 2003,2004 University of Maryland
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package edu.umd.cs.findbugs.detect;

import java.util.*;

import edu.umd.cs.findbugs.*;
import edu.umd.cs.findbugs.ba.AnalysisContext;
import edu.umd.cs.findbugs.ba.ClassContext;
import edu.umd.cs.findbugs.visitclass.AnnotationVisitor;
import org.apache.bcel.Repository;
import org.apache.bcel.classfile.*;
import edu.umd.cs.findbugs.visitclass.Constants2;
import static edu.umd.cs.findbugs.visitclass.Constants2.*;

public class NoteSuppressedWarnings extends AnnotationVisitor 
  implements Detector, Constants2 {

	private static Set<String> packages = new HashSet<String>();

	private SuppressionMatcher suppressionMatcher;

	private BugReporter bugReporter;
        private AnalysisContext analysisContext;

	private NoteSuppressedWarnings recursiveDetector;

	public NoteSuppressedWarnings(BugReporter bugReporter) {
		this(bugReporter, false);
		}
	public NoteSuppressedWarnings(BugReporter bugReporter, boolean recursive) {
		if (!recursive) {
		  DelegatingBugReporter b = (DelegatingBugReporter) bugReporter;
                  BugReporter origBugReporter = b.getRealBugReporter();
		  suppressionMatcher = new SuppressionMatcher();
                  BugReporter filterBugReporter = new FilterBugReporter(origBugReporter, suppressionMatcher, false);
                  b.setRealBugReporter(filterBugReporter);
		  recursiveDetector = new NoteSuppressedWarnings(bugReporter,true);
		  recursiveDetector.suppressionMatcher = 
				suppressionMatcher;
		  }
	

		this.bugReporter = bugReporter;
	}

	public void setAnalysisContext(AnalysisContext analysisContext) {
		this.analysisContext = analysisContext;
	}

	public void visitClassContext(ClassContext classContext) {
		classContext.getJavaClass().accept(this);
	}

        public void visit(JavaClass obj) {
		if (recursiveDetector == null) return;
		try {
		if (getClassName().endsWith("package-info")) return;
		String packageName = getPackageName().replace('/', '.');
		if (!packages.add(packageName)) return;
		String packageInfo = "package-info";
		if (packageName.length() > 0)
			packageInfo = packageName + "." + packageInfo;
			
		JavaClass packageInfoClass = Repository.lookupClass(packageInfo);
		recursiveDetector.visitJavaClass(packageInfoClass);
		} catch (ClassNotFoundException e) {
			// ignore 
		}
	}
        public void visitAnnotation(String annotationClass, Map<String, Object> map,
 boolean runtimeVisible)  {
		if (!annotationClass.endsWith("SuppressWarnings")) return;
		Object value = map.get("value");
		if (value == null || !(value instanceof Object[]))  {
			suppressWarning(null);
			return;
			}
		Object [] suppressedWarnings = (Object[]) value;
		if (suppressedWarnings.length == 0)
			suppressWarning(null);
		else for(int i = 0; i < suppressedWarnings.length; i++)
			suppressWarning((String)suppressedWarnings[i]);
		}

        private void suppressWarning(String pattern) {
		String className = getDottedClassName();
		ClassAnnotation clazz = new ClassAnnotation(getDottedClassName());
		if (className.endsWith("package-info") && recursiveDetector == null) 
			suppressionMatcher.addPackageSuppressor(
			new PackageWarningSuppressor(pattern,
				getPackageName().replace('/', '.')));
		else if (visitingMethod())
		suppressionMatcher.addSuppressor(
			new MethodWarningSuppressor(pattern,
				clazz, MethodAnnotation.fromVisitedMethod(this)));
		else if (visitingField())
		suppressionMatcher.addSuppressor(
			new FieldWarningSuppressor(pattern,
				clazz, FieldAnnotation.fromVisitedField(this)));
		else 
		suppressionMatcher.addSuppressor(
			new ClassWarningSuppressor(pattern,
				clazz));
		}


	public void report() {

		}


}