Start splitting into maven modules

1 files changed, 392 insertions, 0 deletions

diff --git a/base/src/main/java/bjc/utils/cli/objects/BlockReaderCLI.java b/base/src/main/java/bjc/utils/cli/objects/BlockReaderCLI.java
new file mode 100644
index 0000000..ec66fe2
--- /dev/null
+++ b/base/src/main/java/bjc/utils/cli/objects/BlockReaderCLI.java
@@ -0,0 +1,392 @@
+package bjc.utils.cli.objects;
+
+import java.io.InputStreamReader;
+import java.io.Reader;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Scanner;
+import java.util.function.Predicate;
+import java.util.logging.Logger;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.regex.PatternSyntaxException;
+
+import bjc.utils.ioutils.Prompter;
+import bjc.utils.ioutils.blocks.*;
+
+import static bjc.utils.cli.objects.Command.CommandStatus;
+import static bjc.utils.cli.objects.Command.CommandStatus.*;
+
+public class BlockReaderCLI {
+	private final Logger LOGGER = Logger.getLogger(BlockReaderCLI.class.getName());
+
+	public static class BlockReaderState {
+		public final Map<String, BlockReader> readers;
+		public final Map<String, Reader>      sources;
+
+		public BlockReaderState(Map<String, BlockReader> readers, Map<String, Reader> sources) {
+			this.readers = readers;
+			this.sources = sources;
+		}
+	}
+
+	private BlockReaderState stat;
+
+	/**
+	 * Create a new CLI for configuring BlockReaders.
+	 *
+	 * @param srcs
+	 * 	The container of initial I/O sources.
+	 */
+	public BlockReaderCLI(Map<String, Reader> srcs) {
+		stat = new BlockReaderState(new HashMap<>(), srcs);
+	}
+
+	public static void main(String[] args) {
+		/*
+		 * Create/configure I/O sources.
+		 */
+		Map<String, Reader> sources = new HashMap<>();
+		sources.put("stdio", new InputStreamReader(System.in));
+
+		BlockReaderCLI reader = new BlockReaderCLI(sources);
+
+		reader.run(new Scanner(System.in), "console", true);
+	}
+
+	/**
+	 * Run the CLI on an input source.
+	 *
+	 * @param input
+	 * 	The place to read input from.
+	 * @param ioSource
+	 * 	The name of the place to read input from.
+	 * @param interactive
+	 *	Whether or not the source is interactive
+	 */
+	public void run(Scanner input, String ioSource, boolean interactive) {
+		int lno = 0;
+		while(input.hasNextLine()) {
+			if(interactive)
+				System.out.printf("reader-conf(%d)>", lno);
+
+			String ln = input.nextLine();
+
+			lno += 1;
+
+			Command com = Command.fromString(ln, lno, ioSource);
+			if(com == null) continue;
+
+			CommandStatus stat = handleCommand(com, interactive);
+			if(stat == FINISH || stat == ERROR) {
+				return;
+			}
+		}
+
+		input.close();
+	}
+
+	/*
+	 * Handle a command.
+	 */
+	public CommandStatus handleCommand(Command com, boolean interactive) {
+		switch(com.nameCommand) {
+		case "def-filtered":
+			return defFiltered(com);
+		case "def-layered":
+			return defLayered(com);
+		case "def-pushback":
+			return defPushback(com);
+		case "def-simple":
+			return defSimple(com);
+		case "def-serial":
+			return defSerial(com);
+		case "def-toggled":
+			return defToggled(com);
+		case "}":
+		case "end":
+		case "exit":
+		case "quit":
+			if(interactive)
+				System.out.printf("Exiting reader-conf, %d readers configured in %d commands\n",
+						stat.readers.size(), com.lineNo);
+			return FINISH;
+		default:
+			LOGGER.severe(com.error("Unknown command '%s'\n", com.nameCommand));
+			return FAIL;
+		}
+	}
+
+	private CommandStatus defFiltered(Command com) {
+		String remn = com.remnCommand;
+
+		/*
+		 * Get the block name.
+		 */
+		int idx = remn.indexOf(' ');
+		if(idx == -1) {
+			LOGGER.severe(com.error("No name argument for def-filtered.\n"));
+			return FAIL;
+		}
+		String blockName = remn.substring(0, idx).trim();
+		remn             = remn.substring(idx).trim();
+
+		/*
+		 * Check there isn't a reader already bound to this name.
+		 */
+		if(stat.readers.containsKey(blockName)) {
+			LOGGER.warning(com.warn("Shadowing existing reader named %s\n", blockName));
+		}
+
+		/*
+		 * Get the reader name.
+		 */
+		idx = remn.indexOf(' ');
+		if(idx == -1) {
+			LOGGER.severe(com.error("No reader-name argument for def-filtered.\n"));	
+			return FAIL;
+		}
+		String readerName = remn.substring(0, idx).trim();
+		remn              = remn.substring(idx).trim();
+
+		/*
+		 * Check there is a reader bound to that name.
+		 */
+		if(!stat.readers.containsKey(readerName)) {
+			LOGGER.severe(com.error("No source named %s\n", readerName));
+			return FAIL;
+		}
+
+		/*
+		 * Get the pattern.
+		 */
+		if(remn.equals("")) {
+			LOGGER.severe(com.error("No filter argument for def-filtered\n"));
+			return FAIL;
+		}
+
+		String filter = remn;
+
+		try {
+			Pattern pat = Pattern.compile(filter);
+
+			Predicate<Block> pred = (block) -> {
+				Matcher mat = pat.matcher(block.contents);
+
+				return mat.matches();
+			};
+
+			BlockReader reader = new FilteredBlockReader(stat.readers.get(readerName), pred);
+
+			stat.readers.put(blockName, reader);
+		} catch (PatternSyntaxException psex) {
+			LOGGER.severe(com.error("Invalid regular expression '%s' for filter. (%s)\n", filter, psex.getMessage()));
+			return FAIL;
+		}
+
+		return SUCCESS;
+	}
+
+	private CommandStatus defPushback(Command com) {
+		String[] parts = com.remnCommand.split(" ");
+
+		if(parts.length != 2) {
+			LOGGER.severe(com.error("Incorrect number of arguments to def-pushback. Requires a block name and a reader name\n"));
+			return FAIL;
+		}
+
+		String blockName = parts[0];
+		if(stat.readers.containsKey(blockName)) {
+			LOGGER.warning(com.warn("Shadowing existing reader %s\n", blockName));
+			return FAIL;
+		}
+
+		String readerName = parts[1];
+		if(!stat.readers.containsKey(readerName)) {
+			LOGGER.severe(com.error("No reader named %s\n", readerName));
+			return FAIL;
+		}
+
+		BlockReader reader = new PushbackBlockReader(stat.readers.get(readerName));
+		stat.readers.put(blockName, reader);
+
+		return SUCCESS;
+	}
+
+	private CommandStatus defToggled(Command com) {
+		String[] parts = com.remnCommand.split(" ");
+
+		if(parts.length != 3) {
+			LOGGER.severe(com.error("Incorrect number of arguments to def-toggled. Requires a block name and two reader names\n"));
+			return FAIL;
+		}
+
+		/*
+		 * Get the block name.
+		 */
+		String blockName = parts[0];
+		if(stat.readers.containsKey(blockName)) {
+			LOGGER.warning(com.warn("Shadowing existing reader named %s\n", blockName));
+		}
+
+		/*
+		 * Make sure the component readers exist.
+		 */
+		if(!stat.readers.containsKey(parts[1])) {
+			LOGGER.severe(com.error("No reader named %s\n", parts[1]));
+			return FAIL;
+		}
+
+		if(!stat.readers.containsKey(parts[2])) {
+			LOGGER.severe(com.error("No reader named %s\n", parts[2]));
+			return FAIL;
+		}
+
+		BlockReader reader = new ToggledBlockReader(stat.readers.get(parts[1]), stat.readers.get(parts[2]));
+		stat.readers.put(blockName, reader);
+
+		return SUCCESS;
+	}
+
+	private CommandStatus defLayered(Command com) {
+		String[] parts = com.remnCommand.split(" ");
+
+		if(parts.length != 3) {
+			LOGGER.severe(com.error("Incorrect number of arguments to def-layered. Requires a block name and two reader names\n"));
+			return FAIL;
+		}
+
+		/*
+		 * Get the block name.
+		 */
+		String blockName = parts[0];
+		if(stat.readers.containsKey(blockName)) {
+			LOGGER.warning(com.warn("Shadowing existing reader named %s\n", blockName));
+		}
+
+		/*
+		 * Make sure the component readers exist.
+		 */
+		if(!stat.readers.containsKey(parts[1])) {
+			LOGGER.severe(com.error("No reader named %s\n", parts[1]));
+			return FAIL;
+		}
+
+		if(!stat.readers.containsKey(parts[2])) {
+			LOGGER.severe(com.error("No reader named %s\n", parts[2]));
+			return FAIL;
+		}
+
+		BlockReader reader = new LayeredBlockReader(stat.readers.get(parts[1]), stat.readers.get(parts[2]));
+		stat.readers.put(blockName, reader);
+
+		return SUCCESS;
+	}
+
+	private CommandStatus defSerial(Command com) {
+		String[] parts = com.remnCommand.split(" ");
+
+		if(parts.length < 2) {
+			LOGGER.severe(com.error("Not enough arguments to def-serial. Requires at least a block name and at least one reader name\n"));
+			return FAIL;
+		}
+
+		/*
+		 * Get the name for this BlockReader.
+		 */
+		String blockName = parts[0];
+		/*
+		 * Check there isn't a reader already bound to this name.
+		 */
+		if(stat.readers.containsKey(blockName)) {
+			LOGGER.warning(com.warn("Shadowing existing reader named %s\n", blockName));
+		}
+
+		/*
+		 * Get all of the component readers.
+		 */
+		BlockReader[] readerArr = new BlockReader[parts.length - 1];
+		for(int i = 1; i < parts.length; i++) {
+			String readerName = parts[i];
+
+			/*
+			 * Check there is a reader bound to that name.
+			 */
+			if(!stat.readers.containsKey(readerName)) {
+				LOGGER.severe(com.error("No reader named %s\n", readerName));
+				return FAIL;
+			}
+
+			readerArr[i] = stat.readers.get(readerName);
+		}
+
+		BlockReader reader = new SerialBlockReader(readerArr);
+
+		stat.readers.put(blockName, reader);
+
+		return SUCCESS;
+	}
+
+	private CommandStatus defSimple(Command com) {
+		String remn = com.remnCommand;
+
+		/*
+		 * Get the block name.
+		 */
+		int idx = remn.indexOf(' ');
+		if(idx == -1) {
+			LOGGER.severe(com.error("No name argument for def-simple.\n"));
+			return FAIL;
+		}
+		String blockName = remn.substring(0, idx).trim();
+		remn             = remn.substring(idx).trim();
+
+		/*
+		 * Check there isn't a reader already bound to this name.
+		 */
+		if(stat.readers.containsKey(blockName)) {
+			LOGGER.warning(com.warn("Shadowing existing reader named %s\n", blockName));
+		}
+
+		/*
+		 * Get the source name.
+		 */
+		idx = remn.indexOf(' ');
+		if(idx == -1) {
+			LOGGER.severe(com.error("No source-name argument for def-simple.\n"));	
+			return FAIL;
+		}
+		String sourceName = remn.substring(0, idx).trim();
+		remn              = remn.substring(idx).trim();
+
+		/*
+		 * Check there is a source bound to that name.
+		 */
+		if(!stat.sources.containsKey(sourceName)) {
+			LOGGER.severe(com.error("No source named %s\n", sourceName));
+			return FAIL;
+		}
+
+		/*
+		 * Get the pattern.
+		 */
+		if(remn.equals("")) {
+			LOGGER.severe(com.error("No delimiter argument for def-simple\n"));
+			return FAIL;
+		}
+
+		String delim = remn;
+
+		try {
+			BlockReader reader = new SimpleBlockReader(delim, stat.sources.get(sourceName));
+
+			stat.readers.put(blockName, reader);
+		} catch (PatternSyntaxException psex) {
+			LOGGER.severe(com.error("Invalid regular expression '%s' for delimiter. (%s)\n", delim, psex.getMessage()));
+			return FAIL;
+		}
+
+		return SUCCESS;
+	}
+}