1 files changed, 107 insertions, 0 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/ioutils/blocks/SimpleBlockReader.java b/BJC-Utils2/src/main/java/bjc/utils/ioutils/blocks/SimpleBlockReader.java
new file mode 100644
index 0000000..6ee1d57
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/ioutils/blocks/SimpleBlockReader.java
@@ -0,0 +1,107 @@
+package bjc.utils.ioutils.blocks;
+
+import java.io.IOException;
+import java.io.LineNumberReader;
+import java.io.Reader;
+import java.util.NoSuchElementException;
+import java.util.Scanner;
+import java.util.regex.Pattern;
+
+/**
+ * Simple implementation of {@link BlockReader}
+ * 
+ * NOTE: The EOF marker is always treated as a delimiter. You are expected to
+ * handle blocks that may be shorter than you expect.
+ * 
+ * @author EVE
+ *
+ */
+public class SimpleBlockReader implements BlockReader {
+	/*
+	 * I/O source for blocks.
+	 */
+	private LineNumberReader	lnReader;
+	private Scanner			blockReader;
+
+	/*
+	 * The current block.
+	 */
+	private Block	currBlock;
+	private int	blockNo;
+
+	/**
+	 * Create a new block reader.
+	 * 
+	 * @param blockDelim
+	 *                The pattern that separates blocks. Note that the end
+	 *                of file is always considered to end a block.
+	 * 
+	 * @param source
+	 *                The source to read blocks from.
+	 */
+	public SimpleBlockReader(String blockDelim, Reader source) {
+		lnReader = new LineNumberReader(source);
+
+		blockReader = new Scanner(lnReader);
+
+		String pattern = String.format("(?:%s)|\\Z", blockDelim);
+		Pattern pt = Pattern.compile(pattern, Pattern.MULTILINE);
+
+		blockReader.useDelimiter(pt);
+	}
+
+	@Override
+	public boolean hasNextBlock() {
+		return blockReader.hasNext();
+	}
+
+	@Override
+	public Block getBlock() {
+		return currBlock;
+	}
+
+	@Override
+	public boolean nextBlock() {
+		try {
+			int blockStartLine = lnReader.getLineNumber();
+			String blockContents = blockReader.next();
+			int blockEndLine = lnReader.getLineNumber();
+			blockNo += 1;
+
+			currBlock = new Block(blockNo, blockContents, blockStartLine, blockEndLine);
+
+			return true;
+		} catch (NoSuchElementException nseex) {
+			currBlock = null;
+
+			return false;
+		}
+	}
+
+	@Override
+	public int getBlockCount() {
+		return blockNo;
+	}
+
+	@Override
+	public void close() throws IOException {
+		blockReader.close();
+
+		lnReader.close();
+	}
+
+	/**
+	 * Set the delimiter used to separate blocks.
+	 * 
+	 * @param delim
+	 *                The delimiter used to separate blocks.
+	 */
+	public void setDelimiter(String delim) {
+		blockReader.useDelimiter(delim);
+	}
+
+	@Override
+	public String toString() {
+		return String.format("SimpleBlockReader [currBlock=%s, blockNo=%s]", currBlock, blockNo);
+	}
+}