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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
/**
* A vector of leaf nodes.
*
* @author gjoranv
* @since 5.1.4
*/
public class LeafNodeVector<REAL, NODE extends LeafNode<REAL>> extends NodeVector<NODE> {
NODE defaultNode;
/**
* Creates a new vector with the given default node.
*/
// TODO: remove this ctor when the library uses reflection via builders, and resizing won't be necessary
public LeafNodeVector(NODE defaultNode) {
assert (defaultNode != null) : "The default node cannot be null";
this.defaultNode = defaultNode;
if (createNew() == null) {
throw new NullPointerException("Unable to duplicate the default node.");
}
}
// TODO: take class instead of default node when the library uses reflection via builders
public LeafNodeVector(List<REAL> values, NODE defaultNode) {
this(defaultNode);
for (REAL value : values) {
NODE node = createNew();
node.value = value;
vector.add(node);
}
}
/**
* Creates a new Node by cloning the default node.
*/
@SuppressWarnings("unchecked")
private NODE createNew() {
return (NODE) (defaultNode).clone();
}
// TODO: create unmodifiable list in ctor when the library uses reflection via builders
@SuppressWarnings("unchecked")
public List<REAL> asList() {
List<REAL> ret = new ArrayList<REAL>();
for(NODE node : vector) {
ret.add(node.value());
}
return Collections.unmodifiableList(ret);
}
// TODO: Try to eliminate the need for this method when we have moved FileAcquirer to the config library
// It is needed now because the builder has a list of String, while REAL=FileReference.
public static LeafNodeVector<FileReference, FileNode> createFileNodeVector(Collection<String> values) {
List<FileReference> fileReferences = new ArrayList<FileReference>();
for (String s : values)
fileReferences.add(new FileReference(ReferenceNode.stripQuotes(s)));
return new LeafNodeVector<FileReference, FileNode>(fileReferences, new FileNode());
}
public static LeafNodeVector<Path, PathNode> createPathNodeVector(Collection<FileReference> values) {
List<Path> paths = new ArrayList<>();
for (FileReference fileReference : values)
paths.add(Paths.get(fileReference.value()));
return new LeafNodeVector<Path, PathNode>(paths, new PathNode());
}
}
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