Application: gvSIG desktop

package org.gvsig.expressionevaluator.impl;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Iterator;

import java.util.List;

import org.apache.commons.lang3.StringUtils;

import org.gvsig.expressionevaluator.Grammar;

import org.gvsig.expressionevaluator.GrammarSet;

import org.gvsig.expressionevaluator.Statement;

import org.gvsig.expressionevaluator.Statement.StatementContext;

/**

 *

 * @author jjdelcerro

 */

public class DefaultGrammarSet implements GrammarSet {

    private final List<Grammar> grammars;

    public DefaultGrammarSet() {

        this.grammars = new ArrayList<>();

    }

    @Override

    public Statement getApplicableStatement(StatementContext context) {

        for (Grammar grammar : this.grammars) {

            Statement stmt = grammar.getApplicableStatement(context);

            if( stmt != null ) {

                return stmt;

            }

        }

        return null;

    }

    @Override

    public boolean isReservedWord(String id) {

        for (Grammar grammar : this.grammars) {

            if( grammar.isReservedWord(id) ) {

                return true;

            }

        }

        return false;

    }

    public boolean contains(Grammar grammar) {

        if( grammar == null ) {

            return false;

        }

        for (Grammar theGrammar : this.grammars) {

            if( StringUtils.equalsIgnoreCase(theGrammar.getName(), grammar.getName()) ) {

                return true;

            }

        }

        return false;

    }

    @Override

    public void add(Grammar grammar) {

        if( grammar == null ) {

            return;

        }

        if( this.contains(grammar) ) {

            throw new IllegalArgumentException("The grammar set already contains the grammar '"+grammar+"'.");

        }

        this.grammars.add(grammar);

    }

    @Override

    public Grammar get(int i) {

        return this.grammars.get(i);

    }

    @Override

    public int size() {

        return this.grammars.size();

    }

    @Override

    public boolean isEmpty() {

        return this.grammars.isEmpty();

    }

    @Override

    public List<Grammar> toList() {

        return Collections.unmodifiableList(this.grammars);

    }

    @Override

    public Iterator<Grammar> iterator() {

        return this.grammars.iterator();

    }

}