/*
* Licensed 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 com.facebook.presto.bytecode.instruction;
import com.facebook.presto.bytecode.BytecodeNode;
import com.facebook.presto.bytecode.BytecodeVisitor;
import com.facebook.presto.bytecode.MethodGenerationContext;
import com.facebook.presto.bytecode.OpCode;
import com.facebook.presto.bytecode.ParameterizedType;
import com.google.common.collect.ImmutableList;
import org.objectweb.asm.MethodVisitor;
import java.util.List;
import static com.facebook.presto.bytecode.ArrayOpCode.getArrayOpCode;
import static com.facebook.presto.bytecode.OpCode.ANEWARRAY;
import static com.facebook.presto.bytecode.OpCode.CHECKCAST;
import static com.facebook.presto.bytecode.OpCode.INSTANCEOF;
import static com.facebook.presto.bytecode.OpCode.NEW;
import static com.facebook.presto.bytecode.OpCode.NEWARRAY;
import static com.facebook.presto.bytecode.ParameterizedType.type;
import static com.google.common.base.Preconditions.checkState;
@SuppressWarnings("UnusedDeclaration")
public class TypeInstruction
implements InstructionNode
{
public static InstructionNode newObject(Class<?> type)
{
return new TypeInstruction(NEW, type(type));
}
public static InstructionNode newObject(ParameterizedType type)
{
return new TypeInstruction(NEW, type);
}
public static InstructionNode newPrimitiveArray(ParameterizedType type)
{
return new TypeInstruction(NEWARRAY, type);
}
public static InstructionNode newObjectArray(Class<?> type)
{
return new TypeInstruction(ANEWARRAY, type(type));
}
public static InstructionNode newObjectArray(ParameterizedType type)
{
return new TypeInstruction(ANEWARRAY, type);
}
public static InstructionNode instanceOf(Class<?> type)
{
return new TypeInstruction(INSTANCEOF, type(type));
}
public static InstructionNode instanceOf(ParameterizedType type)
{
return new TypeInstruction(INSTANCEOF, type);
}
public static InstructionNode cast(Class<?> type)
{
return new TypeInstruction(CHECKCAST, type(type));
}
public static InstructionNode cast(ParameterizedType type)
{
return new TypeInstruction(CHECKCAST, type);
}
private final OpCode opCode;
private final ParameterizedType type;
public TypeInstruction(OpCode opCode, ParameterizedType type)
{
this.opCode = opCode;
this.type = type;
}
@Override
public void accept(MethodVisitor visitor, MethodGenerationContext generationContext)
{
if (opCode == NEWARRAY) {
checkState(type.isPrimitive(), "need primitive type for NEWARRAY");
visitor.visitIntInsn(opCode.getOpCode(), getPrimitiveArrayType(type));
}
else {
visitor.visitTypeInsn(opCode.getOpCode(), type.getClassName());
}
}
private static int getPrimitiveArrayType(ParameterizedType type)
{
return getArrayOpCode(type).getAtype();
}
@Override
public List<BytecodeNode> getChildNodes()
{
return ImmutableList.of();
}
@Override
public <T> T accept(BytecodeNode parent, BytecodeVisitor<T> visitor)
{
return visitor.visitInstruction(parent, this);
}
@Override
public String toString()
{
return opCode + " " + type;
}
}