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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or .
 */
package org.hibernate.mapping;

import java.util.HashMap;
import java.util.Map;

import org.hibernate.boot.model.relational.SqlStringGenerationContext;
import org.hibernate.internal.util.StringHelper;

import static org.hibernate.internal.util.StringHelper.isNotEmpty;

/**
 * A mapping model object representing a {@linkplain jakarta.persistence.UniqueConstraint unique key}
 * constraint on a relational database table.
 *
 * @author Brett Meyer
 */
public class UniqueKey extends Constraint {
	private final Map columnOrderMap = new HashMap<>();
	private boolean nameExplicit; // true when the constraint name was explicitly specified by @UniqueConstraint annotation
	private boolean explicit; // true when the constraint was explicitly specified by @UniqueConstraint annotation

	@Override @Deprecated(since="6.2", forRemoval = true)
	public String sqlConstraintString(
			SqlStringGenerationContext context,
			String constraintName,
			String defaultCatalog,
			String defaultSchema) {
//		return dialect.getUniqueDelegate().uniqueConstraintSql( this );
		// Not used.
		return "";
	}

	public void addColumn(Column column, String order) {
		addColumn( column );
		if ( isNotEmpty( order ) ) {
			columnOrderMap.put( column, order );
		}
	}

	public Map getColumnOrderMap() {
		return columnOrderMap;
	}

	@Deprecated(forRemoval = true)
	public String generatedConstraintNamePrefix() {
		return "UK_";
	}

	@Override
	public String getExportIdentifier() {
		return StringHelper.qualify( getTable().getExportIdentifier(), "UK-" + getName() );
	}

	public boolean isNameExplicit() {
		return nameExplicit;
	}

	public void setNameExplicit(boolean nameExplicit) {
		this.nameExplicit = nameExplicit;
	}

	public boolean isExplicit() {
		return explicit;
	}

	public void setExplicit(boolean explicit) {
		this.explicit = explicit;
	}

	public boolean hasNullableColumn() {
		for ( Column column : getColumns() ) {
			final Column tableColumn = getTable().getColumn( column );
			if ( tableColumn != null && tableColumn.isNullable() ) {
				return true;
			}
		}
		return false;
	}
}