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package eu.dnetlib.functionality.index.model;
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import java.util.Iterator;
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/**
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* Interface for metadata objects.
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*/
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public interface Any extends Iterable<Any> {
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/**
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* Enumeration with the possible value types.
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*
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*/
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public enum ValueType {
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/**
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* The list with the possible value types. MAP map, SEQ sequence, STRING string value, DOUBLE double value,
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* BOOLEAN Boolean value, LONG long value, DATE date (without time), DATETIME date with time
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*/
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MAP, SEQ, STRING, DOUBLE, BOOLEAN, LONG, DATE, DATETIME
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};
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/**
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* @return value type
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*/
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ValueType getValueType();
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/**
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* @return true if value is of type map
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*/
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boolean isMap();
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/**
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* @return true if value is of type sequence
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*/
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boolean isSeq();
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/**
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* @return true if value is of type value
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*/
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boolean isValue();
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/**
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* @return true if value is of type string
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*/
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boolean isString();
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/**
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* @return true if value is of type double
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*/
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boolean isDouble();
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/**
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* @return true if value is of type boolean
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*/
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boolean isBoolean();
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/**
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* @return true if value is of type long
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*/
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boolean isLong();
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/**
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* @return true if value is of type date
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*/
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boolean isDate();
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/**
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* @return true if value is of type date time
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*/
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boolean isDateTime();
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/**
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* @return true if value is of type long or double
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*/
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boolean isNumber();
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/**
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* @return data factory to create Anys of the same kind.
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*/
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DataFactory getFactory();
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/**
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* @return iterator over elements. For {@link Value}, this return an iterator about the value itself. For
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* {@link AnyMap} it returns an iterator on the values.
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*/
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@Override
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Iterator<Any> iterator();
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/**
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* @return true, if the Any does not have content. For {@link Value}: returns always false.
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*/
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boolean isEmpty();
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/**
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* @return size of Any. For {@link Value} this is always 1.
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*/
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int size();
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/**
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* returns this Any as an {@link Value} object or throws an {@link InvalidValueTypeException}.
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*/
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Value asValue();
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/**
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* returns this Any as an {@link AnyMap} object or throws an {@link InvalidValueTypeException}.
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*/
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AnyMap asMap();
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/**
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* returns this Any as an {@link AnySeq} object or throws an {@link InvalidValueTypeException}.
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*/
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AnySeq asSeq();
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}
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