feat(file): support boolean data type

amrdb · Oct 17, 2024 · 40e87df · 40e87df
1 parent 28ac8b7
commit 40e87df
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Showing 3 changed files with 27 additions and 3 deletions.
diff --git a/README.md b/README.md
@@ -7,6 +7,7 @@ My contributions/tasks solutions to the educational database SimpleDB from the D
   statistics ([commit](https://github.com/Amr2812/simpledb/commit/4948b9ea0b37703d6af37259be9dc8f18a428d24))
 - feat(file): handle data not fitting in
   page ([commit](https://github.com/Amr2812/simpledb/commit/c2e44635a5f48d98e758c0760114e499cce0762e))
+- feat(file): support boolean data type ([commit]())
 
 For general information about simpledb:
 

diff --git a/simpledb/file/Page.java b/simpledb/file/Page.java
@@ -62,6 +62,19 @@ public static int maxLength(int strlen) {
         return Integer.BYTES + (strlen * (int) bytesPerChar);
     }
 
+    public boolean getBoolean(int offset) {
+        return bb.get(offset) == 1;
+    }
+
+    public void setBoolean(int offset, boolean b) {
+        if (bb.capacity() - offset < 1) {
+            System.out.println("ERROR: boolean " + (b ? "true" : "false") + " does not fit at location " + offset + " of the page");
+        } else {
+            bb.position(offset);
+            bb.put((byte) (b ? 1 : 0));
+        }
+    }
+
     // a package private method, needed by FileMgr
     ByteBuffer contents() {
         bb.position(0);

diff --git a/simpledb/file/PageFitsTest.java b/simpledb/file/PageFitsTest.java
@@ -39,16 +39,26 @@ public static void main(String[] args) throws IOException {
             System.out.println("*** You didn't test for invalid string");
         }
 
-        int pos3 = 4 + stringsize;
+        boolean bool = true;
+        int pos3 = fm.blockSize();
+        try {
+            p.setBoolean(pos3, bool);
+        } catch (Exception e) {
+            System.out.println("*** You didn't test for invalid boolean");
+        }
+
+        int pos = 4 + stringsize;
         p.setInt(0, 1234);
         p.setString(4, s);
-        p.setInt(pos3, 5678);
+        p.setInt(pos, 5678);
+        p.setBoolean(pos + 4, true);
         fm.write(blk, p);
 
         Page p2 = new Page(fm.blockSize());
         fm.read(blk, p2);
         System.out.println("offset 0 contains " + p2.getInt(0));
         System.out.println("offset 4 contains " + p2.getString(4));
-        System.out.println("offset " + pos3 + " contains " + p2.getInt(pos3));
+        System.out.println("offset " + pos + " contains " + p2.getInt(pos));
+        System.out.println("offset " + pos + 4 + " contains " + p2.getBoolean(pos + 4));
     }
 }