[LIB-13] Modify RegexMatcher for searching by type

[chesshog-scanner.git] / src / main / java / org / hedgecode / chess / scanner / regex / type / RegexBlockFinder.java

diff --git a/src/main/java/org/hedgecode/chess/scanner/regex/type/RegexBlockFinder.java b/src/main/java/org/hedgecode/chess/scanner/regex/type/RegexBlockFinder.java
new file mode 100644 (file)
index 0000000..a8951d8
--- /dev/null
+++ b/src/main/java/org/hedgecode/chess/scanner/regex/type/RegexBlockFinder.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2019-2020. Developed by Hedgecode.
+ *
+ * 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 org.hedgecode.chess.scanner.regex.type;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.hedgecode.chess.scanner.ChessHogScannerConstants;
+import org.hedgecode.chess.scanner.regex.AbstractRegexResult;
+import org.hedgecode.chess.scanner.regex.RegexMatcher;
+import org.hedgecode.chess.scanner.regex.RegexResult;
+
+/**
+ * RegexBlockFinder
+ *
+ * @author Dmitry Samoshin aka gotty
+ */
+public class RegexBlockFinder extends AbstractRegexResult implements RegexMatcher {
+
+    private Pattern startPattern, endPattern;
+    private boolean isMatch;
+    private StringBuilder current;
+    private String key;
+
+    public RegexBlockFinder(String startMatch, String endMatch) {
+        startPattern = Pattern.compile(startMatch);
+        endPattern = Pattern.compile(endMatch);
+        isMatch = false;
+        current = new StringBuilder();
+    }
+
+    @Override
+    public void match(String input) {
+        Matcher matcher = !isMatch ? startPattern.matcher(input) : endPattern.matcher(input);
+        if (matcher.find()) {
+            addCurrent(input);
+            if (isMatch) {
+                if (key != null) {
+                    add(key, current.toString());
+                } else {
+                    add(current.toString());
+                }
+                current = new StringBuilder();
+            } else {
+                key = matcher.groupCount() > 0 ? matcher.group(1) : null;
+            }
+            isMatch = !isMatch;
+        } else {
+            if (isMatch) {
+                addCurrent(input);
+            }
+        }
+    }
+
+    private void addCurrent(String input) {
+        current.append(
+                input
+        ).append(
+                ChessHogScannerConstants.CRLF
+        );
+    }
+
+    @Override
+    public RegexResult result() {
+        return this;
+    }
+
+}