From 49cd96c4c5bbb883c0c5c10d7916ad2e93ff2df0 Mon Sep 17 00:00:00 2001
From: bjculkin <bjculkin@mix.wvu.edu>
Date: Sat, 10 Feb 2018 00:00:07 -0500
Subject: Update and refactor CL formatting

---
 .../utils/ioutils/format/ConditionalDirective.java | 117 +++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 base/src/main/java/bjc/utils/ioutils/format/ConditionalDirective.java

(limited to 'base/src/main/java/bjc/utils/ioutils/format/ConditionalDirective.java')

diff --git a/base/src/main/java/bjc/utils/ioutils/format/ConditionalDirective.java b/base/src/main/java/bjc/utils/ioutils/format/ConditionalDirective.java
new file mode 100644
index 0000000..5ae842c
--- /dev/null
+++ b/base/src/main/java/bjc/utils/ioutils/format/ConditionalDirective.java
@@ -0,0 +1,117 @@
+package bjc.utils.ioutils.format;
+
+import bjc.utils.esodata.Tape;
+
+import java.util.ArrayList;
+import java.util.IllegalFormatConversionException;
+import java.util.List;
+import java.util.regex.Matcher;
+
+class ConditionalDirective implements Directive {
+
+	@Override
+	public void format(StringBuffer sb, Object item, CLModifiers mods, CLParameters arrParams,
+			Tape<Object> formatParams, Matcher dirMatcher, CLFormatter fmt) {
+		StringBuffer condBody = new StringBuffer();
+
+		List<String> clauses = new ArrayList<>();
+		String defClause = null;
+		boolean isDefault = false;
+
+		while(dirMatcher.find()) {
+			/* Process a list of clauses. */
+			String dirName = dirMatcher.group("name");
+			String dirMods = dirMatcher.group("modifiers");
+
+			if(dirName != null) {
+				/* Append everything up to this directive. */
+				dirMatcher.appendReplacement(condBody, "");
+
+				if(dirName.equals("]")) {
+					/* End the conditional. */
+					String clause = condBody.toString();
+					if(isDefault) {
+						defClause = clause;
+					} else {
+						clauses.add(clause);
+					}
+
+					break;
+				} else if(dirName.equals(";")) {
+					/* End the clause. */
+					String clause = condBody.toString();
+					if(isDefault) {
+						defClause = clause;
+					} else {
+						clauses.add(clause);
+					}
+
+					/*
+					 * Mark the next clause as the default.
+					 */
+					if(dirMods.contains(":")) {
+						isDefault = true;
+					}
+				} else {
+					/* Not a special directive. */
+					condBody.append(dirMatcher.group());
+				}
+			}
+		}
+
+		Object par = formatParams.item();
+		if(mods.colonMod) {
+			formatParams.right();
+
+			if(par == null) {
+				throw new IllegalArgumentException("No parameter provided for [ directive.");
+			} else if(!(par instanceof Boolean)) {
+				throw new IllegalFormatConversionException('[', par.getClass());
+			}
+			boolean res = (Boolean) par;
+
+			String frmt;
+			if(res)
+				frmt = clauses.get(1);
+			else
+				frmt = clauses.get(0);
+
+			fmt.doFormatString(frmt, sb, formatParams);
+		} else if(mods.atMod) {
+			if(par == null) {
+				throw new IllegalArgumentException("No parameter provided for [ directive.");
+			} else if(!(par instanceof Boolean)) {
+				throw new IllegalFormatConversionException('[', par.getClass());
+			}
+			boolean res = (Boolean) par;
+
+			if(res) {
+				fmt.doFormatString(clauses.get(0), sb, formatParams);
+			} else {
+				formatParams.right();
+			}
+		} else {
+			int res;
+			if(arrParams.length() > 1) {
+				res = arrParams.getInt(0, "conditional choice", '[');
+			} else {
+				if(par == null) {
+					throw new IllegalArgumentException("No parameter provided for [ directive.");
+				} else if(!(par instanceof Number)) {
+					throw new IllegalFormatConversionException('[', par.getClass());
+				}
+				res = ((Number) par).intValue();
+
+				formatParams.right();
+			}
+
+			if(res < 0 || res > clauses.size()) {
+				if(defClause != null) fmt.doFormatString(defClause, sb, formatParams);
+			} else {
+				fmt.doFormatString(clauses.get(res), sb, formatParams);
+			}
+		}
+		return;
+	}
+
+}
-- 
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