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// This Source Code is in the Public Domain per: http://litesoft.org/License.txt package org.litesoft.orsup.selection.nonpublic; import org.litesoft.orsup.selection.*; /** * An abstract representation of a <b>LIKE</b> SQL <i>WHERE</i> clause.<p> * <a href="../../../Licence.txt">Licence</a><br> * <p/> * This <b>WhereClause</b> is <a href="WhereClauseNotable.html"><b>NOT</b><i>able</i></a>.<p> * <p/> * This form of <b>WhereClause</b> is only used with Strings (both as * Columns and comparison values) to determine if the column <i>contains</i> * the comparison value. The form of the <i>contains</i> currently is * limited to: CONTAINS, STARTS_WITH, ENDS_WITH.<p> * <p/> * See <a href="WhereClause.html">WhereClause</a><br> * See <a href="WhereClauseFactory.html">WhereClauseFactory</a><p> * <p/> * Exceptions: All problems caught when the parameter(s) are checked (as * indicated/implied in the @param tags) will generate an IllegalArgumentException, * and means the API user has a problem. If a NullPointerException (or some * others, like: ClassCastException or ArrayIndexOutOfBoundsException) is thrown, * it means the API developer has a problem. Any Exception that is explicitly * thrown in the API, but unrelated to a parameter, will be listed in the throws * clause (and hopefully in the tag @throws). These may (but probably won't) be * checked Exceptions. * * @author George Smith * @version 2.0 16 DEC 2009 * @version 1.0 10/07/01 */ public abstract class AbstractWhereClauseStringColumnLike extends AbstractWhereClauseColumnReference { private static final Class STRING_CLASS = String.class; /** * Constructor that supports the <b>LIKE</b> SQL <i>WHERE</i> clause.<p> * * @param pType The Type (CONTAINS, STARTS_WITH, or ENDS_WITH) for this WhereClause. * @param pColumnDefinition Column Definition (Column Type must equal String) (!null). */ protected AbstractWhereClauseStringColumnLike( WhereClauseType pType, SimpleColumnDefinition pColumnDefinition ) { super( pType, pColumnDefinition ); if ( pColumnDefinition.getColumnType() != AbstractWhereClauseStringColumnLike.STRING_CLASS ) { throw IllegalArgument.exception( "Column Type", "NOT String" ); } } /** * Helper method for <b>toSQL()</b> that provides a more efficient * mechanism for the recursive decent of a WhereClause <i>tree</i>.<p> * <p/> * Note: May need to override to get proper result for SQL.<p> * * @param pWCtoSqlHelper helper called on each toSQLHelper() * @param pSB the StringBuilder to build the WhereClause into.<p> * * @see WhereClause#toSQL() */ @Override protected final void toSqlHelper( WCtoSqlHelper pWCtoSqlHelper, StringBuilder pSB ) { if ( !pWCtoSqlHelper.preRender( this, pSB ) ) { toSqlColumnReference( pSB ); pSB.append( isNot() ? " NOT LIKE " : " LIKE " ); pSB.append( createSqlLikeClause( true, getColumnDefinition().hasSearchColumn() ).toString() ); pWCtoSqlHelper.postRender( this, pSB ); } } abstract protected String[] getSqlLikeValues(); public final WhereClauseColumnSupport.Like createSqlLikeClause( boolean pQuoted, boolean pLowerCaseValues ) { return WhereClauseColumnSupport.makeSqlLikeValue( pQuoted, pLowerCaseValues, getSqlLikeValues() ); } } |