Update Pratt Parser

1 files changed, 0 insertions, 249 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/parserutils/TokenSplitter.java b/BJC-Utils2/src/main/java/bjc/utils/parserutils/TokenSplitter.java
deleted file mode 100644
index d2569d9..0000000
--- a/BJC-Utils2/src/main/java/bjc/utils/parserutils/TokenSplitter.java
+++ /dev/null
@@ -1,249 +0,0 @@
-package bjc.utils.parserutils;
-
-import java.util.HashSet;
-import java.util.Set;
-import java.util.regex.Pattern;
-
-/**
- * Split a string and keep given delimiters.
- *
- * @author Ben Culkin
- */
-public class TokenSplitter {
-	/*
-	 * This string is a format template for the delimiter matching regex
-	 *
-	 * It does two things:
-	 * 
-	 * <ol> <li> Match to the left of the provided delimiter by positive
-	 * lookahead </li> <li> Match to the right of the provided delimiter by
-	 * positive lookbehind </li> </ol>
-	 *
-	 * Thus, it will only match in places where the delimiter is, but won't
-	 * actually match the delimiter, leaving split to put it into the stream
-	 */
-	private static String WITH_DELIM = "(?:(?<=%1$s)|(?=%1$s))";
-
-	/*
-	 * This string is a format template for the multi-delimiter matching
-	 * regex.
-	 *
-	 * It does the same thing as the single delimiter regex, but has to have
-	 * some negative lookahead/lookbehind assertions to avoid splitting a
-	 * delimiter into pieces.
-	 */
-	private static String WITH_MULTI_DELIM = "(?:(?<=%1$s+)(?!%1$s)|(?<!%1$s)(?=%1$s+))";
-
-	/*
-	 * These represent the internal state of the splitter.
-	 */
-	private StringBuilder	currPatt;
-	private StringBuilder	currExclusionPatt;
-
-	/*
-	 * These represent the external state of the splitter.
-	 *
-	 * Compilation causes internal to become external.
-	 */
-	private Pattern	compPatt;
-	private Pattern	exclusionPatt;
-
-	/*
-	 * These represent info for debugging.
-	 */
-	private Set<String>	delimSet;
-	private Set<String>	multidelimSet;
-	private Set<String>	exclusionSet;
-
-	/**
-	 * Create a new token splitter.
-	 */
-	public TokenSplitter() {
-		delimSet = new HashSet<>();
-		multidelimSet = new HashSet<>();
-		exclusionSet = new HashSet<>();
-	}
-
-	/**
-	 * Split a provided string using configured delimiters, and keeping the
-	 * delimiters.
-	 *
-	 * <p>
-	 * The splitter must be compiled first.
-	 * </p>
-	 * 
-	 * @param inp
-	 *                The string to split.
-	 *
-	 * @return The split string, including delimiters.
-	 *
-	 * @throws IllegalStateException
-	 *                 If the splitter isn't compiled.
-	 */
-	public String[] split(String inp) {
-		if(compPatt == null) throw new IllegalStateException("Token splitter has not been compiled yet");
-
-		/*
-		 * Don't split something that we should exclude from being
-		 * split.
-		 */
-		if(exclusionPatt.matcher(inp).matches()) return new String[] { inp };
-
-		return compPatt.split(inp);
-	}
-
-	/**
-	 * Adds one or more strings as matched delimiters to split on.
-	 *
-	 * Only works for fixed length delimiters.
-	 *
-	 * The provided strings are regex-escaped before being used.
-	 *
-	 * @param delims
-	 *                The delimiters to match on.
-	 */
-	public void addDelimiter(String... delims) {
-		for(String delim : delims) {
-			if(delim == null) throw new NullPointerException("Delim must not be null");
-
-			String quoteDelim = Pattern.quote(delim);
-			String delimPat = String.format(WITH_DELIM, quoteDelim);
-
-			if(currPatt == null) {
-				currPatt = new StringBuilder();
-				currExclusionPatt = new StringBuilder();
-
-				currPatt.append("(?:" + delimPat + ")");
-				currExclusionPatt.append("(?:" + quoteDelim + ")");
-			} else {
-				currPatt.append("|(?:" + delimPat + ")");
-				currExclusionPatt.append("|(?:" + quoteDelim + ")");
-			}
-
-			delimSet.add(delim);
-		}
-	}
-
-	/**
-	 * Adds a character class as a matched delimiter to split on.
-	 *
-	 * The provided string should be a pattern to match one or more
-	 * occurances of.
-	 *
-	 * @param delims
-	 *                The delimiter to split on.
-	 */
-	public void addMultiDelimiter(String... delims) {
-		for(String delim : delims) {
-			if(delim == null) throw new NullPointerException("Delim must not be null");
-
-			String delimPat = String.format(WITH_MULTI_DELIM, "(?:" + delim + ")");
-
-			if(currPatt == null) {
-				currPatt = new StringBuilder();
-				currExclusionPatt = new StringBuilder();
-
-				currPatt.append("(?:" + delimPat + ")");
-				currExclusionPatt.append("(?:(?:" + delim + ")+)");
-
-			} else {
-				currPatt.append("|(?:" + delimPat + ")");
-				currExclusionPatt.append("|(?:(?:" + delim + ")+)");
-			}
-
-			multidelimSet.add(delim);
-		}
-	}
-
-	/**
-	 * Marks strings matching the pattern delim as non-splittable.
-	 *
-	 * @param delims
-	 *                The regex to not splitting matching strings.
-	 */
-	public void addNonMatcher(String... delims) {
-		for(String delim : delims) {
-			if(delim == null) throw new NullPointerException("Delim must not be null");
-
-			if(currPatt == null) {
-				currPatt = new StringBuilder();
-				currExclusionPatt = new StringBuilder();
-
-				currExclusionPatt.append("(?:" + delim + ")");
-			} else {
-				currExclusionPatt.append("|(?:" + delim + ")");
-			}
-
-			exclusionSet.add(delim);
-		}
-	}
-
-	/**
-	 * Compiles the current set of delimiters to a pattern.
-	 *
-	 * Makes this splitter ready to use.
-	 */
-	public void compile() {
-		if(currPatt == null) currPatt = new StringBuilder();
-		if(currExclusionPatt == null) currExclusionPatt = new StringBuilder();
-
-		compPatt = Pattern.compile(currPatt.toString());
-		exclusionPatt = Pattern.compile(currExclusionPatt.toString());
-	}
-
-	/*
-	 * (non-Javadoc)
-	 * 
-	 * @see java.lang.Object#toString()
-	 */
-	@Override
-	public String toString() {
-		StringBuilder builder = new StringBuilder();
-
-		builder.append("TokenSplitter [");
-
-		if(currPatt != null) {
-			builder.append("currPatt=");
-			builder.append(currPatt);
-			builder.append("\n\t, ");
-		}
-
-		if(currExclusionPatt != null) {
-			builder.append("currExclusionPatt=");
-			builder.append(currExclusionPatt);
-			builder.append("\n\t, ");
-		}
-
-		if(compPatt != null) {
-			builder.append("compPatt=");
-			builder.append(compPatt);
-			builder.append("\n\t, ");
-		}
-
-		if(exclusionPatt != null) {
-			builder.append("exclusionPatt=");
-			builder.append(exclusionPatt);
-			builder.append("\n\t, ");
-		}
-
-		if(delimSet != null) {
-			builder.append("delimSet=");
-			builder.append(delimSet);
-			builder.append("\n\t, ");
-		}
-
-		if(multidelimSet != null) {
-			builder.append("multidelimSet=");
-			builder.append(multidelimSet);
-			builder.append("\n\t, ");
-		}
-
-		if(exclusionSet != null) {
-			builder.append("exclusionSet=");
-			builder.append(exclusionSet);
-		}
-
-		builder.append("]");
-		return builder.toString();
-	}
-}