Example usage for org.apache.lucene.spatial.prefix PointPrefixTreeFieldCacheProvider PointPrefixTreeFieldCacheProvider

Introduction

In this page you can find the example usage for org.apache.lucene.spatial.prefix PointPrefixTreeFieldCacheProvider PointPrefixTreeFieldCacheProvider.

Prototype

public PointPrefixTreeFieldCacheProvider(SpatialPrefixTree grid, String shapeField, int defaultSize) 

Source Link

Usage

From source file:org.apache.blur.analysis.type.spatial.lucene.PrefixTreeStrategy.java

License:Apache License

@Override
public ValueSource makeDistanceValueSource(Point queryPoint) {
    PointPrefixTreeFieldCacheProvider p = provider.get(getFieldName());
    if (p == null) {
        synchronized (this) {// double checked locking idiom is okay since
                             // provider is threadsafe
            p = provider.get(getFieldName());
            if (p == null) {
                p = new PointPrefixTreeFieldCacheProvider(grid, getFieldName(), defaultFieldValuesArrayLen);
                provider.put(getFieldName(), p);
            }//  w w w .  j a v a  2 s.  c om
        }
    }

    return new ShapeFieldCacheDistanceValueSource(ctx, p, queryPoint);
}

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