org.eolang.opeo.ast.Cast Maven / Gradle / Ivy
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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.LinkedList;
import java.util.List;
import java.util.function.Function;
import java.util.stream.Collectors;
import lombok.EqualsAndHashCode;
import lombok.ToString;
import org.eolang.jeo.representation.directives.DirectivesData;
import org.eolang.jeo.representation.xmir.HexString;
import org.eolang.jeo.representation.xmir.XmlNode;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.xembly.Directive;
import org.xembly.Directives;
/**
* Cast node.
*
* @since 0.2
*/
@ToString
@EqualsAndHashCode
public final class Cast implements AstNode, Typed {
/**
* Target type.
*/
private final Type target;
/**
* Node to cast.
*/
private final AstNode origin;
/**
* Constructor.
*
* @param node XML node
* @param target Function to determine the origin node.
*/
public Cast(final XmlNode node, final Function target) {
this(Cast.xtarget(node), Cast.xorigin(node, target));
}
/**
* Constructor.
*
* @param target Target type
* @param origin Node to cast
*/
public Cast(final Type target, final AstNode origin) {
this.origin = origin;
this.target = target;
}
@Override
public Iterable toXmir() {
return new Directives()
.add("o").attr("base", "cast")
.append(this.origin.toXmir())
.append(new DirectivesData(this.target.getDescriptor()))
.up();
}
@Override
public List opcodes() {
final List opcodes = new ArrayList<>(3);
opcodes.addAll(this.origin.opcodes());
opcodes.add(this.opcode());
return opcodes;
}
@Override
public Type type() {
return this.target;
}
/**
* Constructor.
*
* @return Cast.
* @checkstyle CyclomaticComplexityCheck (50 lines)
* @checkstyle JavaNCSSCheck (50 lines)
*/
@SuppressWarnings("PMD.CognitiveComplexity")
private AstNode opcode() {
final Type fromtype = new ExpressionType(this.origin).type();
final Type totype = this.target;
final AstNode result;
if (fromtype.equals(totype)) {
result = new Opcode(Opcodes.NOP);
} else if (fromtype.equals(Type.INT_TYPE) && totype.equals(Type.LONG_TYPE)) {
result = new Opcode(Opcodes.I2L);
} else if (fromtype.equals(Type.INT_TYPE) && totype.equals(Type.FLOAT_TYPE)) {
result = new Opcode(Opcodes.I2F);
} else if (fromtype.equals(Type.INT_TYPE) && totype.equals(Type.DOUBLE_TYPE)) {
result = new Opcode(Opcodes.I2D);
} else if (fromtype.equals(Type.LONG_TYPE) && totype.equals(Type.INT_TYPE)) {
result = new Opcode(Opcodes.L2I);
} else if (fromtype.equals(Type.LONG_TYPE) && totype.equals(Type.FLOAT_TYPE)) {
result = new Opcode(Opcodes.L2F);
} else if (fromtype.equals(Type.LONG_TYPE) && totype.equals(Type.DOUBLE_TYPE)) {
result = new Opcode(Opcodes.L2D);
} else if (fromtype.equals(Type.FLOAT_TYPE) && totype.equals(Type.DOUBLE_TYPE)) {
result = new Opcode(Opcodes.F2D);
} else if (fromtype.equals(Type.FLOAT_TYPE) && totype.equals(Type.INT_TYPE)) {
result = new Opcode(Opcodes.F2I);
} else if (fromtype.equals(Type.FLOAT_TYPE) && totype.equals(Type.LONG_TYPE)) {
result = new Opcode(Opcodes.F2L);
} else if (fromtype.equals(Type.DOUBLE_TYPE) && totype.equals(Type.INT_TYPE)) {
result = new Opcode(Opcodes.D2I);
} else if (fromtype.equals(Type.DOUBLE_TYPE) && totype.equals(Type.LONG_TYPE)) {
result = new Opcode(Opcodes.D2L);
} else if (fromtype.equals(Type.DOUBLE_TYPE) && totype.equals(Type.FLOAT_TYPE)) {
result = new Opcode(Opcodes.D2F);
} else if (fromtype.equals(Type.INT_TYPE) && totype.equals(Type.BYTE_TYPE)) {
result = new Opcode(Opcodes.I2B);
} else if (fromtype.equals(Type.INT_TYPE) && totype.equals(Type.CHAR_TYPE)) {
result = new Opcode(Opcodes.I2C);
} else if (fromtype.equals(Type.INT_TYPE) && totype.equals(Type.SHORT_TYPE)) {
result = new Opcode(Opcodes.I2S);
} else {
throw new IllegalStateException(
String.format(
"Can't cast from %s to %s",
fromtype.getDescriptor(),
totype.getDescriptor()
)
);
}
return result;
}
/**
* Prestructor for Cast#target.
*
* @param node XML node
* @return Target type.
*/
private static Type xtarget(final XmlNode node) {
return Type.getType(
new HexString(
node.children()
.collect(Collectors.toCollection(LinkedList::new))
.getLast()
.text()
).decode()
);
}
/**
* Prestructor for Cast#origin.
*
* @param node XML node
* @param target Function to determine the origin node.
* @return Origin node.
*/
private static AstNode xorigin(
final XmlNode node,
final Function target
) {
return target.apply(
node.children().findFirst().orElseThrow(
() -> new IllegalArgumentException(
String.format("Can't retrieve first child node from the node %s", node)
)
)
);
}
}