svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / main / java / org / gvsig / expressionevaluator / impl / grammars / DataAccessGrammarFactory.java @ 44750
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2020 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.expressionevaluator.impl.grammars; |
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import java.util.UUID; |
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import org.apache.commons.lang3.StringUtils; |
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import org.gvsig.expressionevaluator.Code; |
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import org.gvsig.expressionevaluator.Code.Caller; |
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import org.gvsig.expressionevaluator.CodeBuilder; |
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import org.gvsig.expressionevaluator.Codes; |
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import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator; |
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import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
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import org.gvsig.expressionevaluator.ExpressionSyntaxException; |
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import org.gvsig.expressionevaluator.Grammar; |
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import org.gvsig.expressionevaluator.Statement; |
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import org.gvsig.expressionevaluator.Statement.ArgsBuilder; |
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import org.gvsig.expressionevaluator.Statement.StatementContext; |
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import org.gvsig.expressionevaluator.impl.DALFunctions; |
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import org.gvsig.expressionevaluator.impl.DefaultCodeBuilder.BaseCodes; |
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import org.gvsig.expressionevaluator.impl.DefaultStatement; |
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import org.gvsig.expressionevaluator.impl.DefaultStatement.ArgsBuilderFromNames; |
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import org.gvsig.expressionevaluator.impl.function.dataaccess.ExistsFunction; |
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import org.gvsig.expressionevaluator.spi.AbstractGrammarFactory; |
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import static org.gvsig.fmap.dal.DataManager.FUNCTION_FOREING_VALUE; |
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import static org.gvsig.fmap.dal.DataManager.FUNCTION_SELECT; |
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import static org.gvsig.fmap.dal.DataManager.FUNCTION_SELECT_COUNT; |
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/**
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*
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* @author jjdelcerro
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*/
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public class DataAccessGrammarFactory extends AbstractGrammarFactory { |
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private Grammar grammar;
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private static class ExistsStatementBuilder extends DefaultStatement.StatementBuilderBase { |
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private final String listID; |
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private final String existsID; |
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public ExistsStatementBuilder(String listID, String existsID) { |
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super(ExistsFunction.NAME, new ArgsBuilderFromNames(listID, existsID)); |
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this.listID = listID;
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this.existsID = existsID;
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} |
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@Override
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public Code build(StatementContext context) {
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CodeBuilder codeBuilder = context.getCodeBuilder(); |
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Caller code = (Caller) super.build(context);
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BaseCodes args = (BaseCodes) code.parameters(); |
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if (args.size() < 2) { |
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String exists_id = "EXISTS" + UUID.randomUUID().toString().replaceAll("-", ""); |
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args.add(codeBuilder.constant(exists_id)); |
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} else if (args.get(1) == null) { |
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String exists_id = "EXISTS" + UUID.randomUUID().toString().replaceAll("-", ""); |
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args.set(1, codeBuilder.constant(exists_id));
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} |
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code = codeBuilder.function(ExistsFunction.NAME, args); |
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return code;
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} |
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} |
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private static class SelectArgsBuilder implements ArgsBuilder { |
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public SelectArgsBuilder() {
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} |
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@Override
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public String toString() { |
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return "select_args()"; |
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} |
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@Override
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public Codes build(StatementContext context) {
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context.trace(this.toString() + ".build"); |
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CodeBuilder codeBuilder = context.getCodeBuilder(); |
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BaseCodes args = (BaseCodes) codeBuilder.args(); |
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Code columns = context.getCode("COLUMNS");
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Code table = context.getCode("TABLE");
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Code where = context.getCode("WHERE");
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// Code order = context.getCode("ORDER");
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// Code order_mode = context.getCode("ORDER_MODE");
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Code limit = context.getCode("LIMIT");
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if (columns == null) { |
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throw new ExpressionSyntaxException(); |
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} |
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Caller tuple = codeBuilder.tuple(); |
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args.add(tuple); |
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String s = (String) ((Code.Constant) columns).value(); |
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if (!StringUtils.equalsIgnoreCase(s, "*")) { |
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((BaseCodes) (tuple.parameters())).add(codeBuilder.constant(1));
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} |
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args.add(codeBuilder.identifier((String) ((Code.Constant) table).value()));
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if (where == null) { |
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args.add(codeBuilder.constant(null));
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} else {
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args.add(where); |
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} |
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int n = 1; |
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BaseCodes argsX = (BaseCodes) codeBuilder.args(); |
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while (true) { |
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String argNameX = "ORDER" + String.valueOf(n); |
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Code code = context.getCode(argNameX); |
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if (code == null) { |
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break;
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} |
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argsX.add(code); |
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n++; |
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} |
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args.add(codeBuilder.tuple(argsX)); |
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n = 1;
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argsX = (BaseCodes) codeBuilder.args(); |
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while (true) { |
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String argNameX = "ORDER_MODE" + String.valueOf(n); |
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Code code = context.getCode(argNameX); |
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if (code == null) { |
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break;
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} |
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argsX.add(code); |
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n++; |
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} |
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args.add(codeBuilder.tuple(argsX)); |
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if (limit == null) { |
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args.add(codeBuilder.constant(null));
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} else {
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args.add(limit); |
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} |
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return args;
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} |
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} |
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private static class SelectCountArgsBuilder implements ArgsBuilder { |
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public SelectCountArgsBuilder() {
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} |
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@Override
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public String toString() { |
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return "select_count_args()"; |
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} |
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@Override
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public Codes build(StatementContext context) {
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context.trace(this.toString() + ".build"); |
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CodeBuilder codeBuilder = context.getCodeBuilder(); |
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BaseCodes args = (BaseCodes) codeBuilder.args(); |
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Code table = context.getCode("table");
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Code where = context.getCode("where");
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args.add(codeBuilder.identifier((String) ((Code.Constant) table).value()));
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if (where == null) { |
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args.add(codeBuilder.constant(null));
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} else {
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args.add(where); |
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} |
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return args;
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} |
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} |
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public DataAccessGrammarFactory() {
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super(DALFunctions.GRAMMAR_NAME, true); |
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} |
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@Override
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public Grammar create(Object... parameters) { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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if (this.grammar == null) { |
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Grammar theGrammar = manager.createGrammar(this.getName());
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Statement stmt;
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theGrammar.addReservedWord("EXISTS");
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theGrammar.addReservedWord("SELECT");
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theGrammar.addReservedWord("FROM");
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theGrammar.addReservedWord("WHERE");
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theGrammar.addReservedWord("ORDER");
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theGrammar.addReservedWord("DESC");
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theGrammar.addReservedWord("ASC");
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theGrammar.addReservedWord("BY");
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stmt = theGrammar.createStatement("EXISTS");
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stmt.addRule(stmt.require_any_token("EXISTS"));
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stmt.addRule(stmt.require_any_token("("));
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stmt.addRule(stmt.require_expression().capture_as("LIST"));
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stmt.addRule(stmt.optional_any_token(",")
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.addRuleOnTrue(stmt.require_expression().capture_as("ID"))
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); |
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stmt.addRule(stmt.require_any_token(")"));
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stmt.builder(new ExistsStatementBuilder("LIST", "ID")); |
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theGrammar.addStatement(stmt); |
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stmt = theGrammar.createStatement("FOREING_VALUE");
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stmt.addRule(stmt.require_any_token("FOREING"));
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stmt.addRule(stmt.require_any_token("VALUE"));
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stmt.addRule(stmt.require_any_token("FROM"));
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stmt.addRule(stmt.require_identifiers(".").capture_as("IDENTIFIERS")); |
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stmt.code( |
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FUNCTION_FOREING_VALUE, |
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stmt.args_names("IDENTIFIERS")
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); |
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theGrammar.addStatement(stmt); |
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stmt = theGrammar.createStatement("SELECT");
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stmt.addRule(stmt.require_any_token("SELECT"));
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stmt.addRule(stmt.switch_token() |
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.addCase("*", stmt.set_expression("COLUMNS", "*")) |
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.addCase("1", stmt.set_expression("COLUMNS", "1")) |
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.addDefault(stmt.fail()) |
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); |
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stmt.addRule(stmt.require_any_token("FROM"));
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stmt.addRule(stmt.require_identifier().capture_as("TABLE"));
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stmt.addRule(stmt.optional_any_token("WHERE")
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.addRuleOnTrue(stmt.require_expression().capture_as("WHERE"))
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); |
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stmt.addRule(stmt.optional_any_token("ORDER")
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.addRuleOnTrue(stmt.require_any_token("BY"))
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.addRuleOnTrue(stmt.repeat() |
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.addRule(stmt.require_expression().capture_as("ORDER#"))
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.addRule(stmt.switch_token() |
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.addCase("ASC", stmt.set_expression("ORDER_MODE#", true)) |
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.addCase("DESC", stmt.set_expression("ORDER_MODE#", false)) |
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.addDefault(stmt.set_expression("ORDER_MODE#", true)) |
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) |
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.addRule(stmt.optional_any_token(",")
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.addRuleOnFalse(stmt.break_loop()) |
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) |
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) |
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); |
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stmt.addRule(stmt.optional_any_token("LIMIT")
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.addRuleOnTrue(stmt.require_expression().capture_as("LIMIT"))
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); |
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stmt.addRule(stmt.optional_any_token(";"));
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stmt.code( |
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FUNCTION_SELECT, |
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new SelectArgsBuilder()
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); |
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theGrammar.addStatement(stmt); |
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stmt = theGrammar.createStatement("SELECT_COUNT");
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stmt.addRule(stmt.require_any_token("SELECT"));
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stmt.addRule(stmt.require_any_token("COUNT"));
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stmt.addRule(stmt.require_any_token("("));
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stmt.addRule(stmt.require_any_token("*"));
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stmt.addRule(stmt.require_any_token(")"));
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stmt.addRule(stmt.require_any_token("FROM"));
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stmt.addRule(stmt.require_identifier().capture_as("TABLE"));
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stmt.addRule(stmt.optional_any_token("WHERE")
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.addRuleOnTrue(stmt.require_expression().capture_as("WHERE"))
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); |
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stmt.addRule(stmt.require_any_token(";"));
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stmt.code( |
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FUNCTION_SELECT_COUNT, |
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new SelectCountArgsBuilder()
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); |
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theGrammar.addStatement(stmt); |
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this.grammar = theGrammar;
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} |
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return grammar;
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} |
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public static final void selfRegister() { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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manager.registerGrammar(new DataAccessGrammarFactory());
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} |
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} |