/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.flink.graph.asm.translate.translators;
import org.apache.flink.graph.asm.translate.TranslateFunction;
import org.apache.flink.types.IntValue;
import org.apache.flink.types.LongValue;
/**
* Translate {@link LongValue} to {@link IntValue}.
*
* Throws {@link RuntimeException} for integer overflow.
*/
public class LongValueToUnsignedIntValue
implements TranslateFunction<LongValue, IntValue> {
public static final long MAX_VERTEX_COUNT = 1L << 32;
@Override
public IntValue translate(LongValue value, IntValue reuse)
throws Exception {
if (reuse == null) {
reuse = new IntValue();
}
long l = value.getValue();
if (l < 0 || l >= MAX_VERTEX_COUNT) {
throw new IllegalArgumentException("Cannot cast long value " + value + " to integer.");
} else {
reuse.setValue((int) (l & (MAX_VERTEX_COUNT - 1)));
}
return reuse;
}
}