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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.grouping.request;
/**
* This class represents a lookup in a map attribute in a {@link GroupingExpression}.
*
* It evaluates to the value found using the given key for the lookup in that attribute.
* The key is either specified explicitly or found via a key source attribute.
* Two underlying attributes are used to represent the map attribute (the key and value attributes).
*
* @author geirst
*/
public class AttributeMapLookupValue extends AttributeValue {
private final String prefix;
private final String suffix;
private final String key;
private final String keySourceAttribute;
private AttributeMapLookupValue(String attributeValue, String prefix, String suffix, String key, String keySourceAttribute) {
super(attributeValue);
this.prefix = prefix;
this.suffix = suffix;
this.key = key;
this.keySourceAttribute = keySourceAttribute;
}
public static AttributeMapLookupValue fromKey(String prefix, String key, String suffix) {
return new AttributeMapLookupValue(prefix + "{\"" + key + "\"}" + suffix,
prefix, suffix, key, "");
}
public static AttributeMapLookupValue fromKeySourceAttribute(String prefix, String keySourceAttribute, String suffix) {
return new AttributeMapLookupValue(prefix + "{attribute(" + keySourceAttribute + ")}" + suffix,
prefix, suffix, "", keySourceAttribute);
}
@Override
public AttributeMapLookupValue copy() {
return new AttributeMapLookupValue(getAttributeName(), prefix, suffix, key, keySourceAttribute);
}
public String getKeyAttribute() {
return prefix + ".key";
}
public String getValueAttribute() {
return prefix + ".value" + suffix;
}
public String getKey() {
return key;
}
public boolean hasKeySourceAttribute() {
return !keySourceAttribute.isEmpty();
}
public String getKeySourceAttribute() {
return keySourceAttribute;
}
}
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