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 @ 44394
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package org.gvsig.expressionevaluator.impl; |
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import java.io.StringWriter; |
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import java.net.URI; |
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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 java.util.Objects; |
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import java.util.regex.Matcher; |
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import java.util.regex.Pattern; |
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import org.apache.commons.io.FilenameUtils; |
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import org.apache.commons.io.IOUtils; |
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import org.apache.commons.lang3.ArrayUtils; |
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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.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.tools.bookmarksandhistory.Bookmarks; |
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import org.gvsig.tools.bookmarksandhistory.History; |
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import org.gvsig.tools.bookmarksandhistory.impl.BaseBookmarks; |
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import org.gvsig.tools.bookmarksandhistory.impl.BaseHistory; |
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import org.gvsig.tools.resourcesstorage.ResourcesStorage; |
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import org.gvsig.tools.script.Script; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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@SuppressWarnings("UseSpecificCatch") |
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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<Expression> bookmarks; |
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private History<Expression> 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.create();
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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 String evaluatePage(String source) { |
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return evaluatePage(null, source); |
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} |
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@Override
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public String evaluatePage(SymbolTable symbolTable, String source) { |
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String[] sources = StringUtils.substringsBetween(source, "<%", "%>"); |
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if( ArrayUtils.isEmpty(sources) ) {
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return source;
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} |
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String[] values = new String[sources.length]; |
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DefaultInterpreter interpreter = new DefaultInterpreter();
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if( symbolTable!=null ) { |
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interpreter.setSymbolTable(symbolTable); |
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} |
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StringWriter writer = new StringWriter(); |
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interpreter.setWriter(writer); |
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DefaultCompiler compiler = new DefaultCompiler();
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for (int i = 0; i < sources.length; i++) { |
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String theSource = sources[i];
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if( StringUtils.startsWith(theSource, "=") ) { |
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Code code = compiler.compileExpression(theSource.substring(1));
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Object value = interpreter.run(code);
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values[i] = Objects.toString(value, "");
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} else {
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Code code = compiler.compileExpression(theSource.substring(1));
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writer.getBuffer().setLength(0);
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interpreter.run(code); |
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values[i] = writer.toString(); |
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} |
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sources[i] = "<%"+sources[i]+"%>"; |
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} |
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String output = StringUtils.replaceEach(source, sources, values);
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return output;
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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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try {
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if( factory.isAutoload() ) {
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SymbolTable symbolTable = factory.create(); |
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aSymbolTable.addSymbolTable(symbolTable); |
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} |
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} catch(Throwable th) { |
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String factoryName = "Unknown"; |
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try {
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factoryName = factory.getName(); |
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} catch(Throwable th2) { |
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// Do nothing
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} |
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LOGGER.warn("Can't create symbol table '"+factoryName+"'.", th); |
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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.create(); |
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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<Expression> getBookmarks() { |
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if( this.bookmarks==null ) { |
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this.bookmarks = new BaseBookmarks<>(); |
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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<Expression> getHistory() { |
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if( this.history==null ) { |
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this.history = new BaseHistory<>(20); |
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} |
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return this.history; |
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} |
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@Override
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public Script createScript(String name, String code, String languaje) { |
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SimpleScript sc = new SimpleScript(this.createInterpreter(), name, code); |
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return sc;
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} |
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@Override
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public Script locateScript(String name) { |
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return null; |
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} |
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@Override
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public Script loadScript(final URI location) { |
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ResourcesStorage.Resource res = null;
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try {
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if( location==null ) { |
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return null; |
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} |
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res = ResourcesStorage.createResource(location); |
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if( res == null || !res.exists() ) { |
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return null; |
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} |
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Script script = loadScript(res, FilenameUtils.getBaseName(location.getPath())); |
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return script;
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} catch (Exception ex) { |
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LOGGER.warn("Can't load script from URI.", ex);
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return null; |
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} finally {
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IOUtils.closeQuietly(res); |
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} |
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} |
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@Override
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public Script loadScript(ResourcesStorage storage, String name) { |
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ResourcesStorage.Resource res = null;
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try {
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if( storage==null ) { |
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return null; |
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} |
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res = storage.getResource(name); |
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if( res == null || !res.exists() ) { |
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return null; |
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} |
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Script script = loadScript(res, name); |
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return script;
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} catch (Exception ex) { |
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LOGGER.warn("Can't load script from resources storage.", ex);
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return null; |
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} finally {
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IOUtils.closeQuietly(res); |
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} |
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} |
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private static final Pattern RE_LANG = Pattern.compile(".*lang[:]\\s*([a-zA-Z_][a-zA-Z_0-9]*)"); |
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private static final Pattern RE_ENCODING = Pattern.compile(".*encoding[:]\\s*([a-zA-Z_][a-zA-Z_0-9]*)"); |
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private Script loadScript(ResourcesStorage.Resource res, String name) { |
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try {
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if( res == null || !res.exists() ) { |
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return null; |
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} |
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byte[] head_bytes = new byte[500]; |
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IOUtils.read(res.asInputStream(), head_bytes); |
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IOUtils.closeQuietly(res); |
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String head = new String(head_bytes); |
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if( StringUtils.isEmpty(head) ) {
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return null; |
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} |
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head = StringUtils.split("\n")[0]; |
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String lang = "cosa"; |
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String encoding = null; |
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Matcher m = RE_LANG.matcher(head);
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if( m.groupCount()==1 ) { |
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String s = m.group(1); |
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if( !StringUtils.isBlank(s) ) {
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lang = s; |
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} |
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} |
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m = RE_ENCODING.matcher(head); |
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if( m.groupCount()==1 ) { |
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String s = m.group(1); |
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if( !StringUtils.isBlank(s) ) {
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encoding = s; |
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} |
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} |
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String source;
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if( StringUtils.isBlank(encoding) ) {
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source = IOUtils.toString(res.asInputStream()); |
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} else {
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source = IOUtils.toString(res.asInputStream(), encoding); |
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} |
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Script script = this.createScript(name, source, lang);
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return script;
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} catch (Exception ex) { |
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LOGGER.warn("Can't load script from resource.", ex);
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return null; |
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} finally {
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IOUtils.closeQuietly(res); |
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} |
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} |
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} |
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