Application: gvSIG desktop

package org.gvsig.expressionevaluator.impl;

import org.gvsig.expressionevaluator.Grammar;

import java.util.ArrayList;

import java.util.Collections;

import java.util.HashSet;

import java.util.Iterator;

import java.util.List;

import java.util.Set;

import org.apache.commons.lang3.StringUtils;

import org.gvsig.expressionevaluator.Statement;

import org.gvsig.expressionevaluator.Statement.StatementContext;

/**

 *

 * @author jjdelcerro

 */

public class DefaultGrammar implements Grammar {

    private final String name;

    private final List<Statement> statements;

    private final Set<String> reservedWords;

    public DefaultGrammar(String name) {

        this.name = name;

        this.statements = new ArrayList<>();

        this.reservedWords = new HashSet<>();

    }

    @Override

    public String getName() {

        return this.name;

    }

    @Override

    public List<Statement> getStatements() {

        return Collections.unmodifiableList(this.statements);

    }

    @Override

    public Statement createStatement(String name) {

        DefaultStatement stmt = new DefaultStatement(name);

        return stmt;

    }

    @Override

    public void addStatement(Statement statement) {

        this.statements.add(statement);

    }

    @Override

    public Statement getApplicableStatement(StatementContext context) {

        for (Statement statement : statements) {

            if( statement.isApplicable(context) ) {

                return statement;

            }

        }

        return null;

    }

    @Override

    public String toString() {

        return this.getName();

    }

    @Override

    public void addReservedWord(String id) {

        if( StringUtils.isBlank(id) ) {

            return;

        }

        this.reservedWords.add(id.toUpperCase());

    }

    @Override

    public boolean isReservedWord(String id) {

        if( StringUtils.isBlank(id) ) {

            return false;

        }

        return this.reservedWords.contains(id.toUpperCase());

    }

    @Override

    public Iterator<Statement> iterator() {

        return this.statements.iterator();

    }

}