/*
 * Licensed to "Neo Technology," Network Engine for Objects in Lund AB
 * (http://neotechnology.com) under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional information
 * regarding copyright ownership. Neo Technology licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of the License
 * at (http://www.apache.org/licenses/LICENSE-2.0). Unless required by
 * applicable law or agreed to in writing, software distributed under the
 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
 * OF ANY KIND, either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 */
package org.neo4j.neoclipse.search;

import java.util.regex.Pattern;

/**
 * This class is a Neo search expression that is based on Java regular
 * expressions.
 * @author Peter Hänsgen
 */
public class NeoSearchExpression
{
    /**
     * The compiled regular expression.
     */
    private final Pattern pattern;
    private static final Pattern ID_PATTERN = Pattern.compile( "\\d+" );

    /**
     * The constructor.
     */
    public NeoSearchExpression( final Pattern pattern )
    {
        this.pattern = pattern;
    }

    /**
     * Returns true, if the given value represents a match.
     */
    public boolean matches( final Object value )
    {
        String v = String.valueOf( value );

        return pattern.matcher( v ).matches();
    }

    /**
     * Returns the search expression string, e.g. the regular expression.
     */
    public String getExpression()
    {
        return pattern.pattern();
    }

    /**
     * Test if the pattern could be a full node id.
     * @return true if pattern could be a full id number
     */
    public boolean isPossibleId()
    {
        return ID_PATTERN.matcher( pattern.pattern() ).matches();
    }
}