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/*-
* ============LICENSE_START=======================================================
* 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.
* ============LICENSE_END=========================================================
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
*/
package org.openecomp.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);
}
}
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