/*
* Copyright 2013 serso aka se.solovyev
*
* 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.
*
* ---------------------------------------------------------------------
* Contact details
*
* Email: se.solovyev@gmail.com
* Site: http://se.solovyev.org
*/
package org.solovyev.common.text;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
public class ValueOfFormatter<T> implements Formatter<T> {
@Nonnull
private static final ValueOfFormatter<Object> notNullFormatter = new ValueOfFormatter<Object>(false);
@Nonnull
private static final ValueOfFormatter<Object> nullableFormatter = new ValueOfFormatter<Object>(true);
private final boolean processNulls;
private ValueOfFormatter() {
this(false);
}
private ValueOfFormatter(boolean processNulls) {
this.processNulls = processNulls;
}
@Nonnull
public static <T> ValueOfFormatter<T> getNotNullFormatter() {
return (ValueOfFormatter<T>) notNullFormatter;
}
@Nonnull
public static <T> ValueOfFormatter<T> getNullableFormatter() {
return (ValueOfFormatter<T>) nullableFormatter;
}
@edu.umd.cs.findbugs.annotations.SuppressWarnings(value = {"NP_LOAD_OF_KNOWN_NULL_VALUE"}, justification = "If 'processNulls' is true => must result 'null'")
@Override
public String formatValue(@Nullable T t) throws IllegalArgumentException {
if (t == null) {
if (processNulls) {
return String.valueOf(t);
} else {
return null;
}
} else {
return String.valueOf(t);
}
}
}