From 0a062f0fc8ace3a77bd7ef75d40eb6c1761be345 Mon Sep 17 00:00:00 2001
From: "Benjamin J. Culkin" <bjculkin@mix.wvu.edu>
Date: Sun, 10 Sep 2017 21:58:38 -0300
Subject: Add BoundBlockReader

BoundBlockReader is a BlockReader that draws blocks from a pair of
functions.

Thus, it is the most general of the BlockReaders, in that you could
probably implement any of them with suitably chosen functions.
---
 .../bjc/utils/ioutils/blocks/BoundBlockReader.java | 48 ++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 BJC-Utils2/src/main/java/bjc/utils/ioutils/blocks/BoundBlockReader.java

(limited to 'BJC-Utils2/src/main/java/bjc/utils/ioutils')

diff --git a/BJC-Utils2/src/main/java/bjc/utils/ioutils/blocks/BoundBlockReader.java b/BJC-Utils2/src/main/java/bjc/utils/ioutils/blocks/BoundBlockReader.java
new file mode 100644
index 0000000..3c9a872
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/ioutils/blocks/BoundBlockReader.java
@@ -0,0 +1,48 @@
+package bjc.utils.ioutils.blocks;
+
+import java.io.IOException;
+
+import java.util.function.Supplier;
+
+public class BoundBlockReader implements BlockReader {
+	private BooleanSupplier checker;
+	private Supplier<Block> getter;
+
+	private Block current;
+
+	private int blockNo;
+
+	public BoundBlockReader(BooleanSupplier blockChecker, Supplier<Block> blockGetter) {
+		checker = blockChecker;
+		getter  = blockGetter;
+
+		blockNo += 1;
+	}
+
+	@Override
+	public boolean hasNextBlock() {
+		return blockChecker.getAsBoolean();
+	}
+
+	@Override
+	public Block getBlock() {
+		return current;
+	}
+
+	@Override
+	public boolean nextBlock() {
+		if(checker.getAsBoolean()) {
+			current  = getter.get();
+			blockNo += 1;
+
+			return true;
+		} 
+
+		return false;
+	}
+
+	@Override
+	public int getBlockCount() {
+		return blockNo;
+	}
+}
-- 
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