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ANTLR Runtime Source Code
ANTLR is a powerful parser generator for multiple programming languages including Java.
ANTLR contains 2 major modules:
ANTLR Runtime Source Code files are provided in the distribution packge (antlr4-4.10.1.zip). You can download them at ANTLR Website.
You can also browse the source code below:
✍: FYIcenter
⏎ org/antlr/v4/runtime/misc/DoubleKeyMap.java
/* * Copyright (c) 2012-2017 The ANTLR Project. All rights reserved. * Use of this file is governed by the BSD 3-clause license that * can be found in the LICENSE.txt file in the project root. */ package org.antlr.v4.runtime.misc; import java.util.Collection; import java.util.LinkedHashMap; import java.util.Map; import java.util.Set; /** Sometimes we need to map a key to a value but key is two pieces of data. * This nested hash table saves creating a single key each time we access * map; avoids mem creation. */ public class DoubleKeyMap<Key1, Key2, Value> { Map<Key1, Map<Key2, Value>> data = new LinkedHashMap<Key1, Map<Key2, Value>>(); public Value put(Key1 k1, Key2 k2, Value v) { Map<Key2, Value> data2 = data.get(k1); Value prev = null; if ( data2==null ) { data2 = new LinkedHashMap<Key2, Value>(); data.put(k1, data2); } else { prev = data2.get(k2); } data2.put(k2, v); return prev; } public Value get(Key1 k1, Key2 k2) { Map<Key2, Value> data2 = data.get(k1); if ( data2==null ) return null; return data2.get(k2); } public Map<Key2, Value> get(Key1 k1) { return data.get(k1); } /** Get all values associated with primary key */ public Collection<Value> values(Key1 k1) { Map<Key2, Value> data2 = data.get(k1); if ( data2==null ) return null; return data2.values(); } /** get all primary keys */ public Set<Key1> keySet() { return data.keySet(); } /** get all secondary keys associated with a primary key */ public Set<Key2> keySet(Key1 k1) { Map<Key2, Value> data2 = data.get(k1); if ( data2==null ) return null; return data2.keySet(); } }
⏎ org/antlr/v4/runtime/misc/DoubleKeyMap.java
Or download all of them as a single archive file:
File name: antlr-runtime-4.10.1-sources.jar File size: 308953 bytes Release date: 2022-04-15 Download
⇐ What Is ANTLR Parser Generator
2018-10-21, 30998👍, 0💬
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