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A Speedment bundle that shades all dependencies into one jar. This is
useful when deploying an application on a server.
/**
*
* Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
*
* 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.speedment.runtime.compute;
import com.speedment.runtime.compute.expression.Expression;
import com.speedment.runtime.compute.expression.ExpressionType;
import com.speedment.runtime.compute.internal.expression.ComposedUtil;
import com.speedment.runtime.compute.internal.expression.MapperUtil;
import com.speedment.runtime.compute.trait.HasCase;
import com.speedment.runtime.compute.trait.HasCompare;
import com.speedment.runtime.compute.trait.HasCompose;
import com.speedment.runtime.compute.trait.HasHash;
import com.speedment.runtime.compute.trait.HasMap;
import java.util.function.Function;
import java.util.function.UnaryOperator;
/**
* Expression that given an entity returns a non-null {@code String} value. This
* expression can be implemented using a lambda, or it can be a result of
* another operation. It has additional methods for operating on it.
*
* @param type to extract from
*
* @see Function
*
* @author Emil Forslund
* @since 3.1.0
*/
@FunctionalInterface
public interface ToString
extends Expression,
Function,
HasMap, ToString>,
HasCase>,
HasHash,
HasCompare,
HasCompose {
/**
* Returns a typed {@code ToString} using the provided {@code lambda}.
*
* @param type to extract from
* @param lambda to convert
* @return a typed {@code ToString} using the provided {@code lambda}
*
* @throws NullPointerException if the provided {@code lambda} is
* {@code null}
*/
static ToString of(Function lambda) {
if (lambda instanceof ToString) {
return (ToString) lambda;
} else {
return lambda::apply;
}
}
@Override
String apply(T object);
@Override
default ExpressionType expressionType() {
return ExpressionType.STRING;
}
@Override
default ToString map(UnaryOperator mapper) {
return MapperUtil.mapString(this, mapper);
}
@Override
default ToString toUpperCase() {
return map(String::toUpperCase);
}
@Override
default ToString toLowerCase() {
return map(String::toLowerCase);
}
@Override
default long hash(T object) {
return apply(object).hashCode();
}
@Override
default int compare(T first, T second) {
return apply(first).compareTo(apply(second));
}
@Override
default ToStringNullable compose(Function before) {
@SuppressWarnings("unchecked")
final Function casted = (Function) before;
return ComposedUtil.composeToString(casted, this);
}
}