/*
* 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.expression;
import com.facebook.presto.bytecode.BytecodeBlock;
import com.facebook.presto.bytecode.BytecodeNode;
import com.facebook.presto.bytecode.Scope;
import com.facebook.presto.bytecode.Variable;
import com.google.common.base.Throwables;
import org.testng.annotations.Test;
import java.awt.Point;
import java.lang.reflect.Field;
import java.util.function.Function;
import static com.facebook.presto.bytecode.ParameterizedType.type;
import static com.facebook.presto.bytecode.expression.BytecodeExpressionAssertions.assertBytecodeExpression;
import static com.facebook.presto.bytecode.expression.BytecodeExpressionAssertions.assertBytecodeNode;
import static com.facebook.presto.bytecode.expression.BytecodeExpressions.constantInt;
import static com.facebook.presto.bytecode.expression.BytecodeExpressions.constantString;
import static com.facebook.presto.bytecode.expression.BytecodeExpressions.newInstance;
import static com.facebook.presto.bytecode.expression.BytecodeExpressions.setStatic;
import static org.testng.Assert.assertEquals;
public class TestSetFieldBytecodeExpression
{
public static String testField;
@Test
public void testSetField()
throws Exception
{
assertSetPoint(point -> point.setField("x", constantInt(42)));
assertSetPoint(point -> point.setField(field(Point.class, "x"), constantInt(42)));
}
public static void assertSetPoint(Function<BytecodeExpression, BytecodeExpression> setX)
throws Exception
{
Function<Scope, BytecodeNode> nodeGenerator = scope -> {
Variable point = scope.declareVariable(Point.class, "point");
BytecodeExpression setExpression = setX.apply(point);
assertEquals(setExpression.toString(), "point.x = 42;");
return new BytecodeBlock()
.append(point.set(newInstance(Point.class, constantInt(3), constantInt(7))))
.append(setExpression)
.append(point.ret());
};
assertBytecodeNode(nodeGenerator, type(Point.class), new Point(42, 7));
}
@Test
public void testSetStaticField()
throws Exception
{
assertSetStaticField(setStatic(getClass(), "testField", constantString("testValue")));
assertSetStaticField(setStatic(getClass().getField("testField"), constantString("testValue")));
assertSetStaticField(setStatic(type(getClass()), "testField", constantString("testValue")));
}
public void assertSetStaticField(BytecodeExpression setStaticField)
throws Exception
{
testField = "fail";
assertBytecodeExpression(setStaticField, null, getClass().getSimpleName() + ".testField = \"testValue\";");
assertEquals(testField, "testValue");
}
private static Field field(Class<?> clazz, String name)
{
try {
return clazz.getField(name);
}
catch (NoSuchFieldException e) {
throw Throwables.propagate(e);
}
}
}