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 @ 44738
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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.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.ExpressionEvaluatorLocator; |
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import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
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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.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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/**
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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 class ExistsStatementBuilder extends DefaultStatement.StatementBuilderBase { |
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private final String ListID; |
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public ExistsStatementBuilder(String ListID) { |
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super(ExistsFunction.NAME, new ArgsBuilderFromNames(ListID)); |
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this.ListID = ListID;
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} |
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@Override
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public Code build(StatementContext context) {
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UUID x = UUID.randomUUID(); |
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String exists_id = x.toString().replaceAll("-", ""); |
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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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args.add("EXISTS_ID", codeBuilder.constant(exists_id));
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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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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_expression("LIST"));
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stmt.builder(new ExistsStatementBuilder("LIST")); |
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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.require_any_token("*","1")); |
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stmt.addRule(stmt.require_any_token("FROM"));
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stmt.addRule(stmt.require_identifier("TABLE"));
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stmt.addRule(stmt.optional_any_token("WHERE")
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.addRuleOnTrue(stmt.require_expression("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( |
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stmt.repeat() |
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.addRule(stmt.require_expression("ORDER#"))
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.addRule(stmt.switch_token() |
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.addCase("ASC",
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stmt.set_expression("ORDER_MODE#", true) |
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) |
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.addCase("DESC",
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stmt.set_expression("ORDER_MODE#", false) |
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) |
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.addDefault( |
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stmt.set_expression("ORDER_MODE#", true) |
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) |
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) |
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.addRule( |
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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("LIMIT"))
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); |
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stmt.addRule(stmt.require_any_token(";"));
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stmt.code( |
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DALFunctions.FUNCTION_SELECT, |
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stmt.args_names("TABLE","WHERE","ORDER#","ORDER_MODE#","LIMIT") |
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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("TABLE"));
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stmt.addRule(stmt.optional_any_token("WHERE")
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.addRuleOnTrue(stmt.require_expression("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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DALFunctions.FUNCTION_SELECT_COUNT, |
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stmt.args_names("TABLE","WHERE") |
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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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} |