/**
* BSD-style license; for more info see http://pmd.sourceforge.net/license.html
*/
package net.sourceforge.pmd.lang.java.rule.strictexception;
import java.util.List;
import net.sourceforge.pmd.lang.java.ast.ASTCatchStatement;
import net.sourceforge.pmd.lang.java.ast.ASTClassOrInterfaceType;
import net.sourceforge.pmd.lang.java.ast.ASTFormalParameter;
import net.sourceforge.pmd.lang.java.ast.ASTThrowStatement;
import net.sourceforge.pmd.lang.java.ast.ASTTryStatement;
import net.sourceforge.pmd.lang.java.ast.ASTType;
import net.sourceforge.pmd.lang.java.rule.AbstractJavaRule;
/**
* Catches the use of exception statements as a flow control device.
*
* @author Will Sargent
*/
public class ExceptionAsFlowControlRule extends AbstractJavaRule {
@Override
public Object visit(ASTThrowStatement node, Object data) {
ASTTryStatement parent = node.getFirstParentOfType(ASTTryStatement.class);
if (parent == null) {
return data;
}
for (parent = parent.getFirstParentOfType(ASTTryStatement.class); parent != null; parent = parent
.getFirstParentOfType(ASTTryStatement.class)) {
List<ASTCatchStatement> list = parent.findDescendantsOfType(ASTCatchStatement.class);
for (ASTCatchStatement catchStmt : list) {
ASTFormalParameter fp = (ASTFormalParameter) catchStmt.jjtGetChild(0);
ASTType type = fp.getFirstDescendantOfType(ASTType.class);
ASTClassOrInterfaceType name = type.getFirstDescendantOfType(ASTClassOrInterfaceType.class);
if (node.getFirstClassOrInterfaceTypeImage() != null
&& node.getFirstClassOrInterfaceTypeImage().equals(name.getImage())) {
addViolation(data, name);
}
}
}
return data;
}
}