com.google.api.tools.framework.util.ProtoPathWrapper Maven / Gradle / Ivy
/*
* Copyright (C) 2017 Google, Inc.
*
* 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 com.google.api.tools.framework.util;
import com.google.common.base.MoreObjects;
import com.google.common.collect.ImmutableList;
import java.util.Arrays;
import java.util.Collection;
import java.util.LinkedList;
import java.util.Objects;
/**
* Thin wrapper around the collection of integers that forms a "path" as defined by the
* SourceCodeInfo.Location.path field in a FileDescriptor.
*/
public class ProtoPathWrapper {
public static final ProtoPathWrapper EMPTY_PATH = new ProtoPathWrapper();
private final LinkedList path;
public ProtoPathWrapper(Integer... pathElements) {
this(Arrays.asList(pathElements));
}
public ProtoPathWrapper(Collection pathElements) {
this.path = new LinkedList<>(pathElements);
}
public ProtoPathWrapper(ProtoPathWrapper parentPath, Integer... pathElements) {
this.path = new LinkedList<>(parentPath.path);
this.path.addAll(Arrays.asList(pathElements));
}
public ProtoPathWrapper getParentPath() {
return new ProtoPathWrapper(path.subList(0, path.size() - 1));
}
public Integer getPathElement(int index) {
return path.get(index);
}
public ImmutableList getPathElements() {
return ImmutableList.copyOf(path);
}
public boolean isEmpty() {
return path.isEmpty();
}
public int getDepth() {
return path.size();
}
@Override
public String toString() {
return MoreObjects.toStringHelper(this).add("path", path).toString();
}
@Override
public int hashCode() {
return Objects.hash(path);
}
@Override
public boolean equals(Object obj) {
return (this == obj)
|| (obj != null
&& obj instanceof ProtoPathWrapper
&& path.equals(((ProtoPathWrapper) obj).path));
}
}