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Diffstat (limited to 'appc-common/src/main/java/org/onap/appc/util/PathContext.java')
-rw-r--r-- | appc-common/src/main/java/org/onap/appc/util/PathContext.java | 103 |
1 files changed, 103 insertions, 0 deletions
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 index 000000000..79b75d1a4 --- /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); + } +} |