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Node.java
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package org.softwareheritage.graph;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* A node in the Software Heritage graph.
*
* @author The Software Heritage developers
*/
public class Node {
/**
* Software Heritage graph node types, as described in the
* <a href="https://docs.softwareheritage.org/devel/swh-model/data-model.html">data model</a>.
*/
public enum Type {
/** Content node */
CNT,
/** Directory node */
DIR,
/** Origin node */
ORI,
/** Release node */
REL,
/** Revision node */
REV,
/** Snapshot node */
SNP;
/**
* Converts integer to corresponding SWH node type.
*
* @param intType node type represented as an integer
* @return the corresponding {@link Node.Type} value
* @see org.softwareheritage.graph.Node.Type
*/
public static Node.Type fromInt(int intType) {
switch (intType) {
case 0:
return CNT;
case 1:
return DIR;
case 2:
return ORI;
case 3:
return REL;
case 4:
return REV;
case 5:
return SNP;
}
return null;
}
/**
* Converts string to corresponding SWH node type.
*
* @param strType node type represented as a string
* @return the corresponding {@link Node.Type} value
* @see org.softwareheritage.graph.Node.Type
*/
public static Node.Type fromStr(String strType) {
if (!strType.matches("cnt|dir|ori|rel|rev|snp")) {
throw new IllegalArgumentException("Unknown node type: " + strType);
}
return Node.Type.valueOf(strType.toUpperCase());
}
/**
* Parses SWH node type possible values from formatted string (see the <a
* href="https://docs.softwareheritage.org/devel/swh-graph/api.html#terminology">API
* syntax</a>).
*
* @param strFmtType node types represented as a formatted string
* @return a list containing the {@link Node.Type} values
* @see org.softwareheritage.graph.Node.Type
*/
public static ArrayList<Node.Type> parse(String strFmtType) {
ArrayList<Node.Type> types = new ArrayList<>();
if (strFmtType.equals("*")) {
List<Node.Type> nodeTypes = Arrays.asList(Node.Type.values());
types.addAll(nodeTypes);
} else {
types.add(Node.Type.fromStr(strFmtType));
}
return types;
}
}
}

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