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/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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*
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* Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved.
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*
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* The contents of this file are subject to the terms of the GNU General Public License Version 3
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* only ("GPL"). You may not use this file except in compliance with the License. You can obtain a
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* copy of the License at http://www.gnu.org/licenses/gpl-3.0.html See the License for the specific
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* language governing permissions and limitations under the License.
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*
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* When distributing the software, include this License Header Notice in each file.
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*/
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package org.openconcerto.sql.model;
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import org.openconcerto.sql.model.SQLSelect.ArchiveMode;
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/**
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* Allow to specify which rows we're interested in.
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*
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* @author Sylvain CUAZ
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*/
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public class SQLRowMode {
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public static final boolean check(final ArchiveMode archiveMode, final SQLRow r) {
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if (archiveMode == SQLSelect.BOTH)
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return true;
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return (archiveMode == SQLSelect.ARCHIVED && r.isArchived()) || (archiveMode == SQLSelect.UNARCHIVED && !r.isArchived());
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}
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public static final SQLRowMode DATA = new SQLRowMode(SQLSelect.UNARCHIVED, true, true);
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public static final SQLRowMode DEFINED = new SQLRowMode(SQLSelect.BOTH, true, true);
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public static final SQLRowMode VALID = new SQLRowMode(SQLSelect.UNARCHIVED, true, false);
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public static final SQLRowMode EXIST = new SQLRowMode(SQLSelect.BOTH, true, false);
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public static final SQLRowMode INEXISTANT = new SQLRowMode(SQLSelect.BOTH, false, false);
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/** any row matches : no access to the db */
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public static final SQLRowMode NO_CHECK = INEXISTANT;
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private final ArchiveMode archiveMode;
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private final boolean existing;
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private final boolean undefined;
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public SQLRowMode(ArchiveMode archiveMode, boolean existing, boolean excludeUndefined) {
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this.archiveMode = archiveMode;
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this.existing = existing;
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this.undefined = excludeUndefined;
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}
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public ArchiveMode getArchiveMode() {
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return this.archiveMode;
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}
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public boolean wantExisting() {
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return this.existing;
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}
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public boolean excludeUndefined() {
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return this.undefined;
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}
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/**
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* Checks whether <code>r</code> conforms to this mode.
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*
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* @param r the row to test, may be <code>null</code>.
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* @return <code>true</code> if <code>r</code> conforms, always <code>false</code> for
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* <code>null</code>.
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*/
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public boolean check(SQLRow r) {
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if (this == NO_CHECK)
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return true;
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if (r == null)
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return false;
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// check undef first since it doesn't require values and thus a query
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if (this.excludeUndefined() && r.isUndefined())
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return false;
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if (!check(this.getArchiveMode(), r))
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return false;
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if (this.wantExisting() != r.exists())
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return false;
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return true;
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}
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public SQLRow filter(SQLRow r) {
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return this.check(r) ? r : null;
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}
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}
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