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Invocation.java
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Invocation.java
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/*
* The MIT License (MIT)
*
* Copyright (c) 2016-2023 Objectionary.com
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.eolang.opeo.ast;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;
import lombok.ToString;
import org.objectweb.asm.Opcodes;
import org.xembly.Directive;
import org.xembly.Directives;
/**
* Invocation output node.
* @since 0.1
*/
@ToString
public final class Invocation implements AstNode {
/**
* Source or target on which the invocation is performed.
*/
private final AstNode source;
/**
* Method name.
*/
private final String method;
/**
* Arguments.
*/
private final List<AstNode> arguments;
/**
* Constructor.
* @param source Source or target on which the invocation is performed
* @param method Method name
* @param args Arguments
*/
public Invocation(
final AstNode source,
final String method,
final AstNode... args
) {
this(source, method, Arrays.asList(args));
}
/**
* Constructor.
* @param source Source or target on which the invocation is performed
* @param method Method name
* @param arguments Arguments
*/
public Invocation(
final AstNode source,
final String method,
final List<AstNode> arguments
) {
this.source = source;
this.method = method;
this.arguments = arguments;
}
@Override
public String print() {
return String.format(
"(%s).%s%s",
this.source.print(),
this.method,
this.args()
);
}
@Override
public Iterable<Directive> toXmir() {
if (Objects.isNull(this.source) || Objects.isNull(this.method)) {
throw new IllegalArgumentException(
String.format(
"Source and method must not be null, but they are %s",
this
)
);
}
final Directives directives = new Directives();
directives.add("o")
.attr("base", String.format(".%s", this.method))
.append(this.source.toXmir());
this.arguments.stream().map(AstNode::toXmir).forEach(directives::append);
return directives.up();
}
@Override
public List<AstNode> opcodes() {
//@checkstyle MethodBodyCommentsCheck (10 lines)
// @todo #76:90min Implement and test invocation opcodes compilation.
// Current implementation is dummy and is used only to pass integration tests.
// We need to implement and test invocation opcodes compilation.
final List<AstNode> res = new ArrayList<>(0);
this.arguments.stream().map(AstNode::opcodes).forEach(res::addAll);
res.add(new Opcode(Opcodes.INVOKEVIRTUAL, "V", this.method, "V()"));
return res;
}
/**
* Print arguments.
* @return Arguments
*/
private String args() {
final String result;
if (this.arguments.isEmpty()) {
result = "";
} else {
result = this.arguments.stream().map(AstNode::print)
.collect(Collectors.joining(" ", " ", ""));
}
return result;
}
}