com.facebook.presto.spi.block.PageBuilderStatus Maven / Gradle / Ivy
/*
* 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.spi.block;
public class PageBuilderStatus
{
public static final int DEFAULT_MAX_PAGE_SIZE_IN_BYTES = 1024 * 1024;
private final int maxPageSizeInBytes;
private long currentSize;
public PageBuilderStatus()
{
this(DEFAULT_MAX_PAGE_SIZE_IN_BYTES);
}
public PageBuilderStatus(int maxPageSizeInBytes)
{
this.maxPageSizeInBytes = maxPageSizeInBytes;
}
public BlockBuilderStatus createBlockBuilderStatus()
{
return new BlockBuilderStatus(this);
}
public int getMaxPageSizeInBytes()
{
return maxPageSizeInBytes;
}
public boolean isEmpty()
{
return currentSize == 0;
}
public boolean isFull()
{
return currentSize >= maxPageSizeInBytes;
}
void addBytes(int bytes)
{
if (bytes < 0) {
throw new IllegalArgumentException("bytes cannot be negative");
}
currentSize += bytes;
}
public long getSizeInBytes()
{
return currentSize;
}
@Override
public String toString()
{
StringBuilder buffer = new StringBuilder("BlockBuilderStatus{");
buffer.append("maxSizeInBytes=").append(maxPageSizeInBytes);
buffer.append(", currentSize=").append(currentSize);
buffer.append('}');
return buffer.toString();
}
}