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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* 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.intellij.openapi.util;
import org.jetbrains.annotations.NonNls;
/**
* Returns {@code true} or {@code false} for the given input object.
* <p/>
* See {@link Conditions} for chained conditions.
*
* @author dsl
*/
public interface Condition<T> {
boolean value(T t);
Condition<Object> NOT_NULL = new Condition<Object>() {
@Override
public boolean value(final Object object) {
return object != null;
}
@NonNls
@Override
public String toString() {
return "Condition.NOT_NULL";
}
};
/**
* @see com.intellij.openapi.util.Conditions#alwaysTrue()
*/
Condition TRUE = new Condition() {
@Override
public boolean value(final Object object) {
return true;
}
@NonNls
@Override
public String toString() {
return "Condition.TRUE";
}
};
/**
* @see com.intellij.openapi.util.Conditions#alwaysFalse()
*/
Condition FALSE = new Condition() {
@Override
public boolean value(final Object object) {
return false;
}
@NonNls
@Override
public String toString() {
return "Condition.FALSE";
}
};
}
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