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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 node types to the corresponding int value
*
* @param type node type as an enum
* @return the corresponding int value
*/
public static int toInt(Node.Type type) {
switch (type) {
case CNT: return 0;
case DIR: return 1;
case ORI: return 2;
case REL: return 3;
case REV: return 4;
case SNP: return 5;
}
throw new IllegalArgumentException("Unknown node type: " + type);
}
/**
* 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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