org.wildfly.swarm.cli.ParseState Maven / Gradle / Ivy

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/**
 * Copyright 2015-2017 Red Hat, Inc, and individual contributors.
 *
 * Licensed 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.wildfly.swarm.cli;

import javax.enterprise.inject.Vetoed;

/**
 * @author Bob McWhirter
 */
@Vetoed
class ParseState {

    private final String[] args;

    private int cur;

    ParseState(String... args) {
        this.args = args;
        this.cur = 0;
    }

    String la() {
        if (this.cur >= this.args.length) {
            return null;
        }
        return this.args[this.cur];
    }

    String consume() {
        if (la() == null) {
            // TODO (jrp) this may need to be internationalized, but I'm not certain what the error is
            throw new RuntimeException("parse error");
        }
        return this.args[this.cur++];
    }
}