/*
* FindBugs - Find bugs in Java programs
* Copyright (C) 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 org.apache.bcel.Constants;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.Instruction;
import org.apache.bcel.generic.ObjectType;
import edu.umd.cs.findbugs.ba.Hierarchy;
import edu.umd.cs.findbugs.ba.Location;
import edu.umd.cs.findbugs.ba.ObjectTypeFactory;
import edu.umd.cs.findbugs.ba.RepositoryLookupFailureCallback;
/**
* A StreamFactory for normal java.io streams that are created using NEW
* instructions.
*/
public class IOStreamFactory implements StreamFactory {
private ObjectType baseClassType;
private ObjectType[] uninterestingSubclassTypeList;
private String bugType;
public IOStreamFactory(String baseClass, String[] uninterestingSubclassList, String bugType) {
this.baseClassType = ObjectTypeFactory.getInstance(baseClass);
this.uninterestingSubclassTypeList = new ObjectType[uninterestingSubclassList.length];
for (int i = 0; i < uninterestingSubclassList.length; ++i) {
this.uninterestingSubclassTypeList[i] = ObjectTypeFactory.getInstance(uninterestingSubclassList[i]);
}
this.bugType = bugType;
}
public Stream createStream(Location location, ObjectType type, ConstantPoolGen cpg,
RepositoryLookupFailureCallback lookupFailureCallback) {
try {
Instruction ins = location.getHandle().getInstruction();
if (ins.getOpcode() != Constants.NEW)
return null;
if (Hierarchy.isSubtype(type, baseClassType)) {
boolean isUninteresting = false;
for (ObjectType aUninterestingSubclassTypeList : uninterestingSubclassTypeList) {
if (Hierarchy.isSubtype(type, aUninterestingSubclassTypeList)) {
isUninteresting = true;
break;
}
}
Stream result = new Stream(location, type.getClassName(), baseClassType.getClassName())
.setIgnoreImplicitExceptions(true);
if (!isUninteresting)
result.setInteresting(bugType);
return result;
}
} catch (ClassNotFoundException e) {
lookupFailureCallback.reportMissingClass(e);
}
return null;
}
}
// vim:ts=3