1 files changed, 83 insertions, 0 deletions
diff --git a/src/main/java/bjc/inflexion/InflectionFormatException.java b/src/main/java/bjc/inflexion/InflectionFormatException.java
new file mode 100644
index 0000000..f4b4329
--- /dev/null
+++ b/src/main/java/bjc/inflexion/InflectionFormatException.java
@@ -0,0 +1,83 @@
+/**
+ * (C) Copyright 2022 Benjamin Culkin.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package bjc.inflexion;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Exception thrown if the string we are attempting to compile has invalid
+ * syntax.
+ *
+ * @author bjculkin
+ *
+ */
+public class InflectionFormatException extends RuntimeException {
+	private static final long serialVersionUID = -5306003088746525691L;
+
+	/**
+	 * The string we attempted to parse.
+	 */
+	public final String inp;
+
+	/**
+	 * The errors we encountered parsing the string.
+	 */
+	public final List<String> parseErrors;
+
+	/**
+	 * Create a new format exception.
+	 *
+	 * @param inp
+	 *                    The string we are attempting to compile
+	 * @param parseErrors
+	 *                    The errors we encountered parsing the string.
+	 */
+	public InflectionFormatException(String inp, List<String> parseErrors) {
+		this.inp = inp;
+		// Can't modify the list of parse errors.
+		this.parseErrors = Collections.unmodifiableList(parseErrors);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 *
+	 * @see java.lang.Throwable#toString()
+	 */
+	@Override
+	public String toString() {
+		boolean doBrief = false;
+
+		if (doBrief)
+			return String.format("Encountered %d errors attempting to parse string %s",
+					parseErrors.size(), inp);
+
+		StringBuilder sb = new StringBuilder(parseErrors.size());
+		sb.append("Encountered errors attempting to parse the following string:\n\t");
+		sb.append(inp);
+		sb.append("\nErrors:");
+		for (int i = 0; i < parseErrors.size(); i++) {
+			String msg = parseErrors.get(i);
+			sb.append("\n\t");
+			sb.append(msg);
+		}
+		sb.append("\n(total of ");
+		sb.append(parseErrors.size());
+		sb.append(" errors)");
+
+		return sb.toString();
+	}
+}
+\ No newline at end of file