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Modify builtin index-related procedures to take a single 'specifier' …
…rather than separate label and property
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community/kernel/src/main/java/org/neo4j/kernel/builtinprocs/IndexSpecifier.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| /* | ||
| * Copyright (c) 2002-2016 "Neo Technology," | ||
| * Network Engine for Objects in Lund AB [http://neotechnology.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Neo4j is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.neo4j.kernel.builtinprocs; | ||
|
|
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| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
|
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| import org.neo4j.helpers.collection.Pair; | ||
|
|
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| import static java.lang.String.format; | ||
|
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| public class IndexSpecifier | ||
| { | ||
|
|
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| private final String specification; | ||
| private final String label; | ||
| private final String property; | ||
|
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| public IndexSpecifier( String specification ) | ||
| { | ||
| this.specification = specification; | ||
| Pair<String, String> components = parse(); | ||
| label = components.first(); | ||
| property = components.other(); | ||
| } | ||
|
|
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| public String label() | ||
| { | ||
| return label; | ||
| } | ||
|
|
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| public String property() | ||
| { | ||
| return property; | ||
| } | ||
|
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| @Override | ||
| public String toString() | ||
| { | ||
| return specification; | ||
| } | ||
|
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| private Pair<String, String> parse() | ||
| { | ||
| Pattern pattern = Pattern.compile( "" + | ||
| ":" + or( simpleIdentifier( "simpleLabel" ), complexIdentifier( "complexLabel" ) ) + | ||
| "\\(" + or( simpleIdentifier( "simpleProperty" ), complexIdentifier( "complexProperty" ) ) + "\\)" | ||
| ); | ||
| Matcher matcher = pattern.matcher( specification ); | ||
| if ( !matcher.find() ) | ||
| { | ||
| throw new IllegalArgumentException( "Cannot parse index specification " + specification ); | ||
| } | ||
| return Pair.of( | ||
| either( matcher.group( "simpleLabel" ), matcher.group( "complexLabel" ) ), | ||
| either( matcher.group( "simpleProperty" ), matcher.group( "complexProperty" ) ) | ||
| ); | ||
| } | ||
|
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| private String either( String first, String second ) | ||
| { | ||
| return first != null ? first : second; | ||
| } | ||
|
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| private static String or( String first, String second ) | ||
| { | ||
| return "(:?" + first + "|" + second + ")"; | ||
| } | ||
|
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| private static String simpleIdentifier( String name ) | ||
| { | ||
| return format( "(?<%s>[A-Za-z0-9_]+)", name ); | ||
| } | ||
|
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| private static String complexIdentifier( String name ) | ||
| { | ||
| return format( "(?:`(?<%s>[^`]+)`)", name ); | ||
| } | ||
| } |
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