[infer][java] modeling that the resource created by ZipFile.getInputStream(ZipEntry entry) is closed by ZipFile.close()

Summary:
This fix fixes a case of false positive when a resource created by ZipFile.getInputStream() is expected to closed when closing the file

infer/models/java/src/java/util/jar/JarFile.java

@@ -11,8 +11,6 @@ package java.util.jar;
 
 import java.io.File;
 import java.io.IOException;
-import java.io.InputStream;
-import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
 
 
@@ -43,11 +41,6 @@ public class JarFile extends ZipFile {
         throw new IOException();
     }
 
-    public synchronized InputStream getInputStream(ZipEntry ze)
-            throws IOException {
-        return super.getInputStream(ze);
-    }
-
     public void close() throws IOException {
         super.close();
     }

infer/models/java/src/java/util/zip/ZipFile.java

@@ -11,76 +11,56 @@ package java.util.zip;
 
 import com.facebook.infer.models.InferBuiltins;
 import com.facebook.infer.models.InferUndefined;
-import dalvik.system.CloseGuard;
 
-import java.io.*;
+import java.io.File;
+import java.io.IOException;
 import java.util.Enumeration;
-import java.util.LinkedHashMap;
 import java.util.NoSuchElementException;
 
 public class ZipFile {
 
+  private void init() throws IOException {
+    InferUndefined.can_throw_ioexception_void();
+    InferBuiltins.__set_file_attribute(this);
+  }
 
-    public ZipFile(String name) throws IOException {
-        InferUndefined.can_throw_ioexception_void();
-        //Had to throw before setting attribute else
-        // whenInferRunsOnJarFileClosedThenResourceLeakIsNotFound fails
-        InferBuiltins.__set_file_attribute(this);
-    }
+  public ZipFile(String name) throws IOException {
+    init();
+  }
 
-    public ZipFile(File file, int mode) throws IOException {
-        InferUndefined.can_throw_ioexception_void();
-        InferBuiltins.__set_file_attribute(this);
-    }
+  public ZipFile(File file, int mode) throws IOException {
+    init();
+  }
 
-    public ZipFile(File file) throws ZipException, IOException {
-        this(file, 0);
-    }
+  public ZipFile(File file) throws ZipException, IOException {
+    init();
+  }
 
-    public InputStream getInputStream(ZipEntry entry) throws IOException {
-        FileInputStream in = new FileInputStream("");
-        return new InflaterInputStream(in, null, 0) {
-            private boolean isClosed = false;
+  public void close() throws IOException {
+    InferBuiltins.__set_mem_attribute(this);
+    InferUndefined.can_throw_ioexception_void();
+  }
 
-            public void close() throws IOException {
-                super.close();
-            }
+  protected void finalize() throws IOException {
+    close();
+  }
 
-            protected void fill() throws IOException {
-            }
+  public Enumeration<? extends ZipEntry> entries() {
 
-            private boolean eof;
+    return new Enumeration<ZipEntry>() {
+      private boolean hasEls;
 
-            public int available() throws IOException {
-                return InferUndefined.can_throw_ioexception_int();
-            }
-        };
-    }
+      public boolean hasMoreElements() {
+        return hasEls;
+      }
 
-    public void close() throws IOException {
-        InferBuiltins.__set_mem_attribute(this);
-        InferUndefined.can_throw_ioexception_void();
-    }
+      public ZipEntry nextElement() throws NoSuchElementException {
+        if (hasEls)
+          return new ZipEntry("");
+        else
+          throw new NoSuchElementException();
+      }
+    };
+  }
 
-    protected void finalize() throws IOException {
-        close();
-    }
-
-    public Enumeration<? extends ZipEntry> entries() {
-
-        return new Enumeration<ZipEntry>() {
-            private boolean hasEls;
-
-            public boolean hasMoreElements() {
-                return hasEls;
-            }
-
-            public ZipEntry nextElement() throws NoSuchElementException {
-                if (hasEls)
-                    return new ZipEntry("");
-                else
-                    throw new NoSuchElementException();
-            }
-        };
-    }
 }

infer/tests/codetoanalyze/java/infer/ResourceLeaks.java

@@ -16,7 +16,6 @@ import com.google.common.base.Preconditions;
 import com.google.common.io.Closeables;
 
 import java.io.BufferedInputStream;
-import java.io.BufferedReader;
 import java.io.Closeable;
 import java.io.DataOutputStream;
 import java.io.File;
@@ -906,4 +905,11 @@ public class ResourceLeaks {
     return reader;
   }
 
+  public void withZipFile() throws IOException {
+    ZipFile f = new ZipFile("hi");
+    InputStream s = f.getInputStream(f.getEntry("there"));
+    if (s != null) s.toString();
+    f.close();
+  }
+
 }