org.codehaus.groovy.classgen.BytecodeSequence Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.codehaus.groovy.classgen;
import org.codehaus.groovy.ast.ASTNode;
import org.codehaus.groovy.ast.GroovyCodeVisitor;
import org.codehaus.groovy.ast.stmt.Statement;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
* This class represents a sequence of BytecodeInstructions
* or ASTNodes. The evaluation is depending on the type of
* the visitor.
*
* @see BytecodeInstruction
* @see ASTNode
*/
public class BytecodeSequence extends Statement {
private final List instructions;
public BytecodeSequence(List instructions) {
this.instructions = instructions;
}
public BytecodeSequence(BytecodeInstruction instruction) {
this.instructions = new ArrayList(1);
this.instructions.add(instruction);
}
/**
* Delegates to the visit method used for this class.
* If the visitor is a ClassGenerator, then
* {@link ClassGenerator#visitBytecodeSequence(BytecodeSequence)}
* is called with this instance. If the visitor is no
* ClassGenerator, then this method will call visit on
* each ASTNode element sorted by this class. If one
* element is a BytecodeInstruction, then it will be skipped
* as it is no ASTNode.
*
* @param visitor the visitor
* @see ClassGenerator
*/
public void visit(GroovyCodeVisitor visitor) {
if (visitor instanceof ClassGenerator) {
ClassGenerator gen = (ClassGenerator) visitor;
gen.visitBytecodeSequence(this);
return;
}
for (Iterator iterator = instructions.iterator(); iterator.hasNext();) {
Object part = (Object) iterator.next();
if (part instanceof ASTNode) {
((ASTNode)part).visit(visitor);
}
}
}
public List getInstructions() {
return instructions;
}
}