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| package net.sourceforge.pmd.rules; |
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| import net.sourceforge.pmd.AbstractRule; |
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| import net.sourceforge.pmd.PropertyDescriptor; |
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| import net.sourceforge.pmd.ast.ASTBlock; |
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| import net.sourceforge.pmd.ast.ASTClassOrInterfaceType; |
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| import net.sourceforge.pmd.ast.ASTCompilationUnit; |
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| import net.sourceforge.pmd.ast.ASTLocalVariableDeclaration; |
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| import net.sourceforge.pmd.ast.ASTMethodDeclaration; |
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| import net.sourceforge.pmd.ast.ASTName; |
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| import net.sourceforge.pmd.ast.ASTReferenceType; |
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| import net.sourceforge.pmd.ast.ASTTryStatement; |
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| import net.sourceforge.pmd.ast.ASTType; |
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| import net.sourceforge.pmd.ast.ASTVariableDeclaratorId; |
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| import net.sourceforge.pmd.ast.Node; |
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| import net.sourceforge.pmd.properties.StringProperty; |
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| import java.util.ArrayList; |
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| import java.util.HashSet; |
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| import java.util.Iterator; |
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| import java.util.List; |
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| import java.util.Map; |
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| import java.util.Set; |
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| import java.util.StringTokenizer; |
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| public class CloseResource extends AbstractRule { |
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| private Set types = new HashSet(); |
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| private Set closeTargets = new HashSet(); |
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| private static final PropertyDescriptor closeTargetsDescriptor = new StringProperty("closeTargets", |
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| "Methods which may close this resource", "", 1.0f); |
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| private static final PropertyDescriptor typesDescriptor = new StringProperty("types", |
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| "Types that are affected by this rule", "", 2.0f); |
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| private static final Map propertyDescriptorsByName = asFixedMap(new PropertyDescriptor[] { typesDescriptor, closeTargetsDescriptor }); |
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| protected Map propertiesByName() {
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| return propertyDescriptorsByName;
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| }; |
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| public Object visit(ASTCompilationUnit node, Object data) {
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| if (closeTargets.isEmpty() && getStringProperty(closeTargetsDescriptor) != null) {
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| for (StringTokenizer st = new StringTokenizer(getStringProperty(closeTargetsDescriptor), ","); st.hasMoreTokens();) {
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| closeTargets.add(st.nextToken());
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| } |
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| } |
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| if (types.isEmpty() && getStringProperty(typesDescriptor) != null) {
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| for (StringTokenizer st = new StringTokenizer(getStringProperty(typesDescriptor), ","); st.hasMoreTokens();) {
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| types.add(st.nextToken());
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| } |
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| } |
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| return super.visit(node, data);
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| } |
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| public Object visit(ASTMethodDeclaration node, Object data) {
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| List vars = node.findChildrenOfType(ASTLocalVariableDeclaration.class);
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| List ids = new ArrayList();
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| for (Iterator it = vars.iterator(); it.hasNext();) {
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| ASTLocalVariableDeclaration var = (ASTLocalVariableDeclaration) it.next();
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| ASTType type = var.getTypeNode();
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| if (type.jjtGetChild(0) instanceof ASTReferenceType) {
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| ASTReferenceType ref = (ASTReferenceType) type.jjtGetChild(0);
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| if (ref.jjtGetChild(0) instanceof ASTClassOrInterfaceType) {
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| ASTClassOrInterfaceType clazz = (ASTClassOrInterfaceType) ref.jjtGetChild(0);
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| if (types.contains(clazz.getImage())) {
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| ASTVariableDeclaratorId id = (ASTVariableDeclaratorId) var.jjtGetChild(1).jjtGetChild(0);
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| ids.add(id);
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| } |
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| } |
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| } |
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| } |
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| for (int i = 0; i < ids.size(); i++) {
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| ASTVariableDeclaratorId x = (ASTVariableDeclaratorId) ids.get(i);
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| ensureClosed((ASTLocalVariableDeclaration) x.jjtGetParent().jjtGetParent(), x, data);
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| } |
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| return data;
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| } |
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| private void ensureClosed(ASTLocalVariableDeclaration var,
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| ASTVariableDeclaratorId id, Object data) { |
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| String target = id.getImage() + ".close";
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| Node n = var;
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| while (!((n = n.jjtGetParent()) instanceof ASTBlock)) ;
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| ASTBlock top = (ASTBlock) n;
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| List tryblocks = new ArrayList();
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| top.findChildrenOfType(ASTTryStatement.class, tryblocks, true);
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| boolean closed = false;
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| for (Iterator it = tryblocks.iterator(); it.hasNext();) {
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| ASTTryStatement t = (ASTTryStatement) it.next();
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| if ((t.getBeginLine() > id.getBeginLine()) && (t.hasFinally())) {
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| ASTBlock f = (ASTBlock) t.getFinally().jjtGetChild(0);
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| List names = new ArrayList();
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| f.findChildrenOfType(ASTName.class, names, true);
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| for (Iterator it2 = names.iterator(); it2.hasNext();) {
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| String name = ((ASTName) it2.next()).getImage();
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| if (name.equals(target) || closeTargets.contains(name)) {
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| closed = true;
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| } |
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| } |
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| } |
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| } |
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| if (!closed) {
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| ASTType type = (ASTType) var.jjtGetChild(0);
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| ASTReferenceType ref = (ASTReferenceType) type.jjtGetChild(0);
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| ASTClassOrInterfaceType clazz = (ASTClassOrInterfaceType) ref.jjtGetChild(0);
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| addViolation(data, id, clazz.getImage());
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| } |
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| } |
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| } |