/*
* 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.sql.gen;
import com.facebook.presto.bytecode.BytecodeNode;
import com.facebook.presto.bytecode.MethodGenerationContext;
import com.facebook.presto.bytecode.expression.BytecodeExpression;
import com.facebook.presto.bytecode.instruction.InvokeInstruction;
import com.facebook.presto.spi.type.Type;
import com.google.common.collect.ImmutableList;
import io.airlift.slice.Slice;
import java.lang.reflect.Method;
import java.util.List;
import static com.facebook.presto.bytecode.ParameterizedType.type;
import static com.facebook.presto.sql.gen.Bootstrap.BOOTSTRAP_METHOD;
import static java.util.Objects.requireNonNull;
public class SqlTypeBytecodeExpression
extends BytecodeExpression
{
public static SqlTypeBytecodeExpression constantType(CallSiteBinder callSiteBinder, Type type)
{
requireNonNull(callSiteBinder, "callSiteBinder is null");
requireNonNull(type, "type is null");
Binding binding = callSiteBinder.bind(type, Type.class);
return new SqlTypeBytecodeExpression(type, binding, BOOTSTRAP_METHOD);
}
private final Type type;
private final Binding binding;
private final Method bootstrapMethod;
private SqlTypeBytecodeExpression(Type type, Binding binding, Method bootstrapMethod)
{
super(type(Type.class));
this.type = requireNonNull(type, "type is null");
this.binding = requireNonNull(binding, "binding is null");
this.bootstrapMethod = requireNonNull(bootstrapMethod, "bootstrapMethod is null");
}
@Override
public BytecodeNode getBytecode(MethodGenerationContext generationContext)
{
return InvokeInstruction.invokeDynamic(type.getTypeSignature().toString().replaceAll("\\W+", "_"), binding.getType(), bootstrapMethod, binding.getBindingId());
}
@Override
public List<BytecodeNode> getChildNodes()
{
return ImmutableList.of();
}
@Override
protected String formatOneLine()
{
return type.getTypeSignature().toString();
}
public BytecodeExpression getValue(BytecodeExpression block, BytecodeExpression position)
{
Class<?> fromJavaElementType = type.getJavaType();
if (fromJavaElementType == boolean.class) {
return invoke("getBoolean", boolean.class, block, position);
}
if (fromJavaElementType == long.class) {
return invoke("getLong", long.class, block, position);
}
if (fromJavaElementType == double.class) {
return invoke("getDouble", double.class, block, position);
}
if (fromJavaElementType == Slice.class) {
return invoke("getSlice", Slice.class, block, position);
}
return invoke("getObject", Object.class, block, position).cast(fromJavaElementType);
}
public BytecodeExpression writeValue(BytecodeExpression blockBuilder, BytecodeExpression value)
{
Class<?> fromJavaElementType = type.getJavaType();
if (fromJavaElementType == boolean.class) {
return invoke("writeBoolean", void.class, blockBuilder, value);
}
if (fromJavaElementType == long.class) {
return invoke("writeLong", void.class, blockBuilder, value);
}
if (fromJavaElementType == double.class) {
return invoke("writeDouble", void.class, blockBuilder, value);
}
if (fromJavaElementType == Slice.class) {
return invoke("writeSlice", void.class, blockBuilder, value);
}
return invoke("writeObject", void.class, blockBuilder, value.cast(Object.class));
}
}