svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / DefaultExpressionEvaluatorManager.java @ 44263
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package org.gvsig.expressionevaluator.impl; |
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import org.gvsig.expressionevaluator.Grammar; |
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import org.gvsig.expressionevaluator.GrammarFactory; |
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import java.util.Collection; |
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import java.util.HashMap; |
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import java.util.Map; |
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import org.gvsig.expressionevaluator.Bookmarks; |
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import org.gvsig.expressionevaluator.Code; |
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import org.gvsig.expressionevaluator.CodeBuilder; |
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import org.gvsig.expressionevaluator.Expression; |
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import org.gvsig.expressionevaluator.ExpressionBuilder; |
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import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
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import org.gvsig.expressionevaluator.Interpreter; |
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import org.gvsig.expressionevaluator.LexicalAnalyzer; |
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import org.gvsig.expressionevaluator.MutableSymbolTable; |
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import org.gvsig.expressionevaluator.Optimizer; |
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import org.gvsig.expressionevaluator.SymbolTable; |
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import org.gvsig.expressionevaluator.SymbolTableFactory; |
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import org.gvsig.expressionevaluator.Compiler; |
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import org.gvsig.expressionevaluator.GrammarSet; |
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import org.gvsig.expressionevaluator.History; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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public class DefaultExpressionEvaluatorManager implements ExpressionEvaluatorManager { |
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private static final Logger LOGGER = LoggerFactory.getLogger(DefaultExpressionEvaluatorManager.class); |
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private Double accuracy; |
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private final Map<String,SymbolTableFactory>symbolTableFactories; |
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private final Map<String,GrammarFactory> grammarFactories; |
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private Bookmarks bookmarks;
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private History history;
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public DefaultExpressionEvaluatorManager() {
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this.symbolTableFactories = new HashMap<>(); |
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this.grammarFactories = new HashMap<>(); |
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} |
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@Override
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public SymbolTable getSymbolTable(String name) { |
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if( name == null ) { |
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return null; |
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} |
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SymbolTableFactory factory = this.symbolTableFactories.get(name.toUpperCase());
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if( factory == null ) { |
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return null; |
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} |
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return factory.createSymbolTable();
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} |
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@Override
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public Collection<SymbolTableFactory> getSymbolTableFactories() { |
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return this.symbolTableFactories.values(); |
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} |
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@Override
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public final void registerSymbolTable(SymbolTableFactory factory) { |
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if( factory == null ) { |
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throw new IllegalArgumentException("factory can't be null"); |
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} |
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this.symbolTableFactories.put(factory.getName().toUpperCase(),factory);
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} |
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@Override
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public Object evaluate(String source) { |
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DefaultInterpreter interpreter = new DefaultInterpreter();
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DefaultCompiler compiler = new DefaultCompiler();
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Code code = compiler.compileExpression(source); |
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return interpreter.run(code);
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} |
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@Override
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public Object evaluate(SymbolTable symbolTable, String source) { |
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DefaultInterpreter interpreter = new DefaultInterpreter();
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DefaultCompiler compiler = new DefaultCompiler();
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Code code = compiler.compileExpression(source); |
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interpreter.setSymbolTable(symbolTable); |
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return interpreter.run(code);
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} |
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@Override
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public Object evaluate(SymbolTable symbolTable, Code code) { |
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DefaultInterpreter interpreter = new DefaultInterpreter();
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interpreter.setSymbolTable(symbolTable); |
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return interpreter.run(code);
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} |
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@Override
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public Code compile(String source) { |
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Compiler compiler = this.createCompiler(); |
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return compiler.compileExpression(source);
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} |
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@Override
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public Code compile(LexicalAnalyzer lex, String source) { |
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Compiler compiler = this.createCompiler(); |
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compiler.setLexicalAnalyzer(lex); |
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return compiler.compileExpression(source);
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} |
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@Override
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public Code optimize(SymbolTable symbolTable, Code code) {
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Optimizer optimizer = this.createOptimizer();
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return optimizer.optimize(symbolTable, code);
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} |
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@Override
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public MutableSymbolTable createSymbolTable() {
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DefaultSymbolTable theSymbolTable = new DefaultSymbolTable();
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return theSymbolTable;
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} |
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public void populateSymbolTable(SymbolTable aSymbolTable) { |
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for (SymbolTableFactory factory : this.getSymbolTableFactories() ) { |
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if( factory.isAutoload() ) {
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SymbolTable symbolTable = factory.createSymbolTable(); |
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aSymbolTable.addSymbolTable(symbolTable); |
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} |
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} |
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} |
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@Override
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public LexicalAnalyzer createLexicalAnalyzer() {
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return new SQLLexicalAnalyzer(); |
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} |
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@Override
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public CodeBuilder createCodeBuilder() {
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return new DefaultCodeBuilder(); |
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} |
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@Override
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public Compiler createCompiler() { |
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DefaultCompiler compiler = new DefaultCompiler();
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this.populateGrammars(compiler);
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return compiler;
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} |
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@Override
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public Interpreter createInterpreter() {
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return new DefaultInterpreter(); |
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} |
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@Override
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public Double getAccuracy() { |
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return this.accuracy; |
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} |
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@Override
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public void setAccuracy(Double accuracy) { |
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this.accuracy = accuracy;
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} |
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@Override
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public Expression createExpression() { |
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DefaultExpression e = new DefaultExpression();
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return e;
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} |
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@Override
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public ExpressionBuilder createExpressionBuilder() {
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ExpressionBuilder x = new DefaultExpressionBuilder();
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return x;
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} |
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@Override
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public Optimizer createOptimizer() {
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Optimizer x = new DefaultOptimizer();
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return x;
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} |
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@Override
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public void registerGrammar(GrammarFactory factory) { |
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if( factory==null ) { |
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throw new IllegalArgumentException("factory can't be null"); |
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} |
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this.grammarFactories.put(factory.getName(), factory);
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} |
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@Override
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public Collection<GrammarFactory> getGrammarFactories() { |
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return this.grammarFactories.values(); |
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} |
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public void populateGrammars(Compiler compiler) { |
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GrammarSet grammarSet = compiler.getGrammars(); |
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for (GrammarFactory factory : this.getGrammarFactories() ) { |
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if( factory.isAutoload() ) {
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Grammar grammar = factory.createGrammar(); |
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grammarSet.add(grammar); |
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} |
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} |
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} |
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@Override
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public Grammar createGrammar(String name) { |
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DefaultGrammar grammar = new DefaultGrammar(name);
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return grammar;
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} |
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@Override
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public Bookmarks getBookmarks() {
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if( this.bookmarks==null ) { |
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this.bookmarks = new DefaultBookmarks(); |
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} |
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return this.bookmarks; |
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} |
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@Override
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public History getHistory() {
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if( this.history==null ) { |
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this.history = new DefaultHistory(20); |
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} |
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return this.history; |
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} |
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} |
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