Third part of onap rename

[appc.git] / appc-common / src / main / java / org / onap / appc / util / PathContext.java

diff --git a/appc-common/src/main/java/org/onap/appc/util/PathContext.java b/appc-common/src/main/java/org/onap/appc/util/PathContext.java
new file mode 100644 (file)
index 0000000..79b75d1
--- /dev/null
+++ b/appc-common/src/main/java/org/onap/appc/util/PathContext.java
@@ -0,0 +1,103 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * 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.
+ * 
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.appc.util;
+
+
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.Map;
+
+class PathContext {
+
+       private StringBuilder path = new StringBuilder(128);
+
+       private LinkedList<Integer> indexes = new LinkedList<>();
+       private Map<String, String> entries = new LinkedHashMap<>();
+       private int offset = 0;
+
+       private final String delimiter;
+
+       PathContext() {
+               this(".");
+       }
+
+       PathContext(String delimiter) {
+               this.delimiter = delimiter;
+       }
+
+       private void push(String elem, boolean delimit) {
+               if (elem == null) {
+                       throw new IllegalArgumentException();
+               }
+
+               int length = elem.length();
+
+               if (delimit && !indexes.isEmpty()) {
+                       path.append(delimiter);
+                       length += delimiter.length();
+               }
+
+               path.append(elem);
+               offset += length;
+               indexes.addLast(Integer.valueOf(length));
+       }
+
+       private void pop() {
+               if (indexes.isEmpty()) {
+                       throw new IllegalStateException();
+               }
+               offset -= indexes.removeLast();
+               path.setLength(offset);
+       }
+
+       void pushToken(String token) {
+               push(token, true);
+       }
+
+       void popToken() {
+               pop();
+       }
+
+       void pushModifier(String modifier) {
+               push(modifier, false);
+       }
+
+       void popModifier() {
+               pop();
+       }
+
+       String getPath() {
+               return path.substring(0, offset);
+       }
+
+       void entry(String name, String value) {
+               entries.put(name, value);
+       }
+
+       Map<String, String> entries() {
+               return Collections.unmodifiableMap(entries);
+       }
+}