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/**
 *  Copyright 2005-2015 Red Hat, Inc.
 *
 *  Red Hat 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 io.fabric8.forge.devops.springboot;

/**
 * A little helper class for converting a collection of values to a (usually comma separated) string.
 */
public class CollectionStringBuffer {

    private final StringBuilder buffer = new StringBuilder();
    private String separator;
    private boolean first = true;

    public CollectionStringBuffer() {
        this(", ");
    }

    public CollectionStringBuffer(String separator) {
        this.separator = separator;
    }

    @Override
    public String toString() {
        return buffer.toString();
    }

    public void append(Object value) {
        if (first) {
            first = false;
        } else {
            buffer.append(separator);
        }
        buffer.append(value);
    }

    public String getSeparator() {
        return separator;
    }

    public void setSeparator(String separator) {
        this.separator = separator;
    }

    public boolean isEmpty() {
        return first;
    }

}