Implement pattern builder util class

1 files changed, 67 insertions, 0 deletions

diff --git a/src/org/traccar/helper/PatternBuilder.java b/src/org/traccar/helper/PatternBuilder.java
new file mode 100644
index 000000000..7d307668d
--- /dev/null
+++ b/src/org/traccar/helper/PatternBuilder.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * 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.traccar.helper;
+
+import java.util.regex.Pattern;
+
+public class PatternBuilder {
+
+    private final StringBuilder pattern = new StringBuilder();
+
+    private final boolean collapse = true;
+
+    public PatternBuilder xpr(String s) {
+        pattern.append(s);
+        return this;
+    }
+
+    public PatternBuilder txt(String s) {
+        pattern.append(s.replaceAll("([\\\\\\.\\[\\{\\(\\*\\+\\?\\^\\$\\|])", "\\\\$1"));
+        return this;
+    }
+
+    public PatternBuilder num(String s) {
+        if (collapse) {
+            s = s.replace("dddd", "d{4}").replace("ddd", "d{3}").replace("dd", "d{2}");
+            s = s.replace("xxxx", "x{4}").replace("xxx", "x{3}").replace("xx", "x{2}");
+        }
+        pattern.append(s.replace("d", "\\d").replace("x", "\\p{XDigit}").replaceAll("([\\.\\|])", "\\\\$1"));
+        return this;
+    }
+
+    public PatternBuilder any() {
+        pattern.append(".*");
+        return this;
+    }
+
+    public PatternBuilder not(String s) {
+        return xpr("[^").txt(s).xpr("]+");
+    }
+
+    public PatternBuilder nxt(String s) {
+        return not(s).txt(s);
+    }
+
+    public Pattern compile() {
+        return Pattern.compile(pattern.toString(), Pattern.DOTALL);
+    }
+
+    @Override
+    public String toString() {
+        return pattern.toString();
+    }
+
+}