com.github.rvesse.airline.restrictions.common.NotEmptyRestriction.java Source code

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Here is the source code for com.github.rvesse.airline.restrictions.common.NotEmptyRestriction.java

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/**
 * Copyright (C) 2010-16 the original author or authors.
 *
 * 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 com.github.rvesse.airline.restrictions.common;

import org.apache.commons.lang3.StringUtils;

import com.github.rvesse.airline.help.sections.HelpFormat;
import com.github.rvesse.airline.help.sections.HelpHint;
import com.github.rvesse.airline.model.ArgumentsMetadata;
import com.github.rvesse.airline.model.OptionMetadata;
import com.github.rvesse.airline.parser.ParseState;
import com.github.rvesse.airline.parser.errors.ParseRestrictionViolatedException;
import com.github.rvesse.airline.restrictions.AbstractCommonRestriction;

public class NotEmptyRestriction extends AbstractStringRestriction implements HelpHint {

    @Override
    protected boolean isValid(String value) {
        return !StringUtils.isEmpty(value);
    }

    @Override
    protected <T> ParseRestrictionViolatedException violated(ParseState<T> state, OptionMetadata option,
            String value) {
        return new ParseRestrictionViolatedException("Option '%s' requires a non-empty value", option.getTitle());
    }

    @Override
    protected <T> ParseRestrictionViolatedException violated(ParseState<T> state, ArgumentsMetadata arguments,
            String value) {
        return new ParseRestrictionViolatedException("Arguments '%s' requires a non-empty value",
                AbstractCommonRestriction.getArgumentTitle(state, arguments));
    }

    @Override
    public String getPreamble() {
        return null;
    }

    @Override
    public HelpFormat getFormat() {
        return HelpFormat.PROSE;
    }

    @Override
    public int numContentBlocks() {
        return 1;
    }

    @Override
    public String[] getContentBlock(int blockNumber) {
        if (blockNumber != 0)
            throw new IndexOutOfBoundsException();

        return new String[] { "This options value cannot be empty" };
    }
}