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This more or less rewrites how we do try-catch-finally. From an API point-of-view it looks the same but behind the scenes we actually create the entire try-catch-finally in one go.
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community/codegen/src/main/java/org/neo4j/codegen/CatchClause.java
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/* | |||
* 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.codegen; | |||
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import java.util.List; | |||
import java.util.function.Consumer; | |||
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public class CatchClause | |||
{ | |||
private final Parameter exception; | |||
private final List<Consumer<MethodEmitter>> actions; | |||
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public CatchClause( Parameter exception, List<Consumer<MethodEmitter>> actions ) | |||
{ | |||
this.exception = exception; | |||
this.actions = actions; | |||
} | |||
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public Parameter exception() | |||
{ | |||
return exception; | |||
} | |||
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public List<Consumer<MethodEmitter>> actions() | |||
{ | |||
return actions; | |||
} | |||
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} |
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58
community/codegen/src/main/java/org/neo4j/codegen/LocalVariables.java
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/* | |||
* 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.codegen; | |||
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import java.util.HashMap; | |||
import java.util.Map; | |||
import java.util.concurrent.atomic.AtomicInteger; | |||
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/** | |||
* Repository of local variables. | |||
*/ | |||
public class LocalVariables | |||
{ | |||
private final AtomicInteger counter = new AtomicInteger( 0 ); | |||
private final Map<String,LocalVariable> localVariables = new HashMap<>(); | |||
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public LocalVariable createNew( TypeReference type, String name ) | |||
{ | |||
LocalVariable localVariable = new LocalVariable( type, name, counter.getAndIncrement() ); | |||
localVariables.put( name, localVariable ); | |||
return localVariable; | |||
} | |||
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public LocalVariable get( String name ) | |||
{ | |||
return localVariables.get( name ); | |||
} | |||
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public static LocalVariables copy( LocalVariables original ) | |||
{ | |||
LocalVariables variables = new LocalVariables(); | |||
variables.counter.set( original.counter.get() ); | |||
original.localVariables.forEach( variables.localVariables::put ); | |||
return variables; | |||
} | |||
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public int nextIndex() | |||
{ | |||
return counter.getAndIncrement(); | |||
} | |||
} |
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