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 / DefaultStatement.java @ 44198
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package org.gvsig.expressionevaluator.impl; |
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import java.util.ArrayList; |
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import java.util.List; |
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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.Code.Caller; |
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import org.gvsig.expressionevaluator.Codes; |
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import org.gvsig.expressionevaluator.ExpressionSyntaxException; |
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import org.gvsig.expressionevaluator.LexicalAnalyzer.Token; |
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import org.gvsig.expressionevaluator.Statement; |
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import org.gvsig.expressionevaluator.Statement.CompoundRule; |
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import org.gvsig.expressionevaluator.Statement.ConditionalRule; |
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import org.gvsig.expressionevaluator.Statement.Rule; |
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import org.gvsig.expressionevaluator.Statement.StatementContext; |
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import org.gvsig.expressionevaluator.impl.function.programming.CodeBlockFunction; |
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import org.gvsig.expressionevaluator.impl.DefaultCodeBuilder.BaseCodes; |
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import org.gvsig.expressionevaluator.impl.function.programming.ListFunction; |
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/**
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*
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* @author jjdelcerro
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*/
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public class DefaultStatement implements Statement { |
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private final List<Rule> rules; |
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private String codeId; |
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private ArgsBuilder argsBuilder;
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private final String name; |
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public interface RepeatRule extends CompoundRule { |
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public String getClassifier(); |
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} |
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public class RuleRequireAnyToken implements Rule { |
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private final String[] required_token; |
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public RuleRequireAnyToken(String... required_token) { |
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this.required_token = required_token;
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} |
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public void parse(StatementContext context) { |
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Token token = context.look_token(); |
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if (!token.is(this.required_token)) { |
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throw new ExpressionSyntaxException( |
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I18N.A_XTokenX_was_expected_and_XliteralX_was_found( |
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StringUtils.join(this.required_token),
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token.getLiteral() |
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), |
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context.getLexicalAnalyzer() |
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); |
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} |
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context.next_token(); |
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} |
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private boolean isApplicable(StatementContext context) { |
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Token token = context.look_token(); |
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return token.is(this.required_token); |
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} |
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@Override
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public String toString() { |
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return "require_token(" + StringUtils.join(this.required_token) + ")"; |
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} |
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} |
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public class RuleRequireIdentifier implements Rule { |
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private final String id; |
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public RuleRequireIdentifier(String id) { |
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this.id = id;
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} |
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public void parse(StatementContext context) { |
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Token token = context.look_token(); |
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if (token.getType() != Token.IDENTIFIER) {
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throw new ExpressionSyntaxException( |
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I18N.An_identifier_was_expected_and_XliteralX_was_found(token.getLiteral()), |
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context.getLexicalAnalyzer() |
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); |
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} |
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String identifier = (String) token.getLiteral(); |
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Code code = context.getCodeBuilder().constant(identifier); |
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context.setCode(id, code); |
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context.next_token(); |
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} |
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@Override
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public String toString() { |
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return "require_identifier('" + this.id + "')"; |
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} |
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} |
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public class RuleRequireExpression implements Rule { |
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private final String id; |
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public RuleRequireExpression(String id) { |
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this.id = id;
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} |
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public void parse(StatementContext context) { |
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Code code = context.parse_expression(); |
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if (code == null) { |
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throw new ExpressionSyntaxException(context.getLexicalAnalyzer()); |
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} |
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context.setCode(id, code); |
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} |
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@Override
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public String toString() { |
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return "require_expression('" + this.id + "')"; |
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} |
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} |
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public class RuleRequiereExpressions implements Rule { |
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private final String id; |
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private final String separator; |
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public RuleRequiereExpressions(String id, String separator) { |
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this.id = id;
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this.separator = separator;
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} |
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public void parse(StatementContext context) { |
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Codes codes = context.parse_expressions(this.separator);
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if (codes == null) { |
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throw new ExpressionSyntaxException(context.getLexicalAnalyzer()); |
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} |
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Code code = context.getCodeBuilder().function(CodeBlockFunction.NAME, codes); |
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context.setCode(id, code); |
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} |
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@Override
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public String toString() { |
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return "require_expressions('" + this.id + "', '" + this.separator + "')"; |
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} |
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} |
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public class RuleOptionalAnyToken implements ConditionalRule { |
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private final String[] optional_token; |
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private final List<Rule> onTrueRules; |
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private final List<Rule> onFalseRules; |
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public RuleOptionalAnyToken(String... optional_token) { |
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this.optional_token = optional_token;
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this.onTrueRules = new ArrayList<>(); |
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this.onFalseRules = new ArrayList<>(); |
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} |
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public void parse(StatementContext context) { |
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Token token = context.look_token(); |
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if (token.is(this.optional_token)) { |
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context.next_token(); |
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for (Rule rule : this.onTrueRules) { |
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rule.parse(context); |
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} |
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} else {
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for (Rule rule : this.onFalseRules) { |
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rule.parse(context); |
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} |
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} |
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} |
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public RuleOptionalAnyToken addRuleOnTrue(Rule rule) {
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this.onTrueRules.add(rule);
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return this; |
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} |
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public RuleOptionalAnyToken addRuleOnFalse(Rule rule) {
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this.onFalseRules.add(rule);
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return this; |
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} |
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@Override
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public String toString() { |
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return "optional_token(" + StringUtils.join(this.optional_token) + ") rules:" + StringUtils.join(onTrueRules, ","); |
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} |
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} |
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public class RuleRepeatUntilAnyTokens implements RepeatRule { |
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private final String[] exit_tokens; |
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private final List<Rule> rules; |
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private int counter; |
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public RuleRepeatUntilAnyTokens(String[] exit_tokens) { |
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this.exit_tokens = exit_tokens;
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this.rules = new ArrayList<>(); |
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} |
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public void parse(StatementContext context) { |
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String save = context.getCodeClassifier();
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try {
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this.counter = 1; |
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while (true) { |
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Token token = context.look_token(); |
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if (token.is(this.exit_tokens)) { |
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break;
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} |
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context.setCodeClassifier(String.valueOf(counter).trim());
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for (Rule rule : rules) {
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rule.parse(context); |
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} |
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this.counter = this.counter + 1; |
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} |
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} finally {
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context.setCodeClassifier(save); |
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} |
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} |
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public RuleRepeatUntilAnyTokens addRule(Rule rule) {
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this.rules.add(rule);
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return this; |
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} |
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@Override
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public String getClassifier() { |
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String s = String.valueOf(counter).trim(); |
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return s;
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} |
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@Override
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public String toString() { |
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return "repeat_until_tokens('" + ArrayUtils.toString(this.exit_tokens) + "') rules:" + StringUtils.join(rules, ","); |
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} |
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} |
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public class RuleOptionalIdentifiers implements Rule { |
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private final String id; |
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private final String separator; |
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public RuleOptionalIdentifiers(String id, String separator) { |
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this.id = id;
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this.separator = separator;
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} |
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public void parse(StatementContext context) { |
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BaseCodes args = (BaseCodes) context.getCodeBuilder().args(); |
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Token token = context.look_token(); |
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while (token.getType() == Token.IDENTIFIER) {
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String identifier = (String) token.getLiteral(); |
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Code code = context.getCodeBuilder().constant(identifier); |
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args.add(code); |
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context.next_token(); |
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token = context.look_token(); |
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if (!token.is(this.separator)) { |
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break;
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} |
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context.next_token(); |
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token = context.look_token(); |
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} |
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Code code = null;
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if (args.size() != 0) { |
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code = context.getCodeBuilder().function(ListFunction.NAME, args); |
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} |
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context.setCode(id, code); |
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} |
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@Override
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public String toString() { |
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return "optional_identifiers('" + id + "', '" + this.separator + "')"; |
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} |
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} |
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private static class ArgsBuilderFromNames implements ArgsBuilder { |
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private final String[] argNames; |
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public ArgsBuilderFromNames(String[] argNames) { |
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this.argNames = argNames;
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} |
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public Codes build(StatementContext context) {
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BaseCodes args = (BaseCodes) context.getCodeBuilder().args(); |
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for (String argName : argNames) { |
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if (argName.contains("#")) { |
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int n = 1; |
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while (true) { |
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String argNameX = StringUtils.replace(argName, "#", String.valueOf(n).trim(), 1); |
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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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args.add(code); |
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n++; |
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} |
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} else {
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Code code = context.getCode(argName); |
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args.add(code); |
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} |
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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 ArgsBuilderExpand extends ArgsBuilderFromNames { |
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public ArgsBuilderExpand(String[] argNames) { |
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super(argNames);
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} |
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public Codes build(StatementContext context) {
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BaseCodes args = (BaseCodes) context.getCodeBuilder().args(); |
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Codes base_args = super.build(context);
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for (Code arg : base_args) {
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if( arg.code() == Code.CALLER &&
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((Caller)arg).name().equals(CodeBlockFunction.NAME) ) { |
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Codes block_args = ((Caller)arg).parameters(); |
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for (Code block_arg : block_args) {
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args.add(block_arg); |
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} |
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} else {
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args.add(arg); |
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} |
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} |
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return args;
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} |
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} |
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public DefaultStatement(String name) { |
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this.rules = new ArrayList<>(); |
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this.codeId = null; |
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this.argsBuilder = null; |
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this.name = name;
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} |
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public String getName() { |
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return name;
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} |
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@Override
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public Rule require_any_token(String... token) { |
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return new RuleRequireAnyToken(token); |
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} |
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@Override
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public Rule require_identifier(String id) { |
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return new RuleRequireIdentifier(id); |
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} |
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@Override
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public Rule require_expression(String id) { |
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return new RuleRequireExpression(id); |
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} |
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@Override
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public Rule require_expressions(String id, String separator) { |
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return new RuleRequiereExpressions(id, separator); |
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} |
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@Override
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public ConditionalRule optional_any_token(String... id) { |
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return new RuleOptionalAnyToken(id); |
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} |
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@Override
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public Rule optional_identifiers(String id, String separator) { |
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return new RuleOptionalIdentifiers(id, separator); |
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} |
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@Override
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public CompoundRule repeat_until_any_tokens(String... tokens) { |
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return new RuleRepeatUntilAnyTokens(tokens); |
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} |
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@Override
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public Statement addRule(Rule rule) { |
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this.rules.add(rule);
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return this; |
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} |
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@Override
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public boolean isApplicable(StatementContext context) { |
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if (this.rules.isEmpty()) { |
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return false; |
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} |
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Rule rule = this.rules.get(0); |
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if (!(rule instanceof RuleRequireAnyToken)) { |
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return false; |
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} |
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return ((RuleRequireAnyToken) rule).isApplicable(context);
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} |
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@Override
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public ArgsBuilder args_names(String... args) { |
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ArgsBuilder x = new ArgsBuilderFromNames(args);
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return x;
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} |
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@Override
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public ArgsBuilder args_expand(String... args) { |
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ArgsBuilder x = new ArgsBuilderExpand(args);
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return x;
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} |
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@Override
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public void code(String id, ArgsBuilder argsBuilder) { |
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this.codeId = id;
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this.argsBuilder = argsBuilder;
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} |
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@Override
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public Code parse(StatementContext context) {
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for (Rule rule : rules) {
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rule.parse(context); |
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} |
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Codes args = this.argsBuilder.build(context);
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Code code; |
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if (codeId == null) { |
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code = args.get(0);
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} else {
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if (args.size() == 0) { |
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code = context.getCodeBuilder().function(codeId, null);
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} else {
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code = context.getCodeBuilder().function(codeId, args); |
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} |
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} |
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return code;
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} |
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@Override
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public String toString() { |
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return this.getName() + " " + StringUtils.join(this.rules, ";"); |
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} |
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} |