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/*
 Copyright 2013 Red Hat, Inc. and/or its affiliates.

 This file is part of lightblue.

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see .
 */
package com.redhat.lightblue.metadata.parser;

import com.redhat.lightblue.metadata.FieldConstraint;
import com.redhat.lightblue.metadata.MetadataConstants;
import com.redhat.lightblue.metadata.constraints.MatchesConstraint;
import com.redhat.lightblue.util.Error;

import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;

public class MatchesConstraintParser implements FieldConstraintParser {

    @Override
    public FieldConstraint parse(String name, MetadataParser p, T node) {
        if (!MatchesConstraint.MATCHES.equals(name)) {
            throw Error.get(MetadataConstants.ERR_ILL_FORMED_METADATA, name);
        }

        Object value = p.getValueProperty(node, name);
        MatchesConstraint ret = new MatchesConstraint();

        if (value instanceof String) {
            try {
                ret.setValue(Pattern.compile((String) value));
            } catch (PatternSyntaxException ex) {
                throw Error.get(MetadataConstants.ERR_ILL_FORMED_METADATA, ret.getType());
            }
        } else {
            throw Error.get(MetadataConstants.ERR_ILL_FORMED_METADATA, ret.getType());
        }

        return ret;
    }

    @Override
    public void convert(MetadataParser p, T emptyNode, FieldConstraint object) {
        p.putValue(emptyNode, object.getType(), ((MatchesConstraint) object).getValue());
    }

}