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package org.osgl.util;

/*-
 * #%L
 * Java Tool
 * %%
 * Copyright (C) 2014 - 2017 OSGL (Open Source General Library)
 * %%
 * 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.
 * #L%
 */

import org.osgl.$;

import java.util.Iterator;

class CollectorIterator implements Iterator {

    private Iterator data;
    private String path;

    CollectorIterator
    (Iterator itr, String path) {
        this.data = $.requireNotNull(itr);
        this.path = S.requireNotBlank(path);
    }

    protected Iterator data() {
        return data;
    }

    @Override
    public boolean hasNext() {
        return data.hasNext();
    }

    @Override
    public R next() {
        return $.getProperty(data.next(), path);
    }

    @Override
    public void remove() {
        E.unsupport();
    }

    @Override
    public int hashCode() {
        return $.hc(data, path);
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj instanceof CollectorIterator) {
            CollectorIterator that = (CollectorIterator)obj;
            return $.eq(that.data, data) && $.eq(that.path, path);
        }
        return false;
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder("CollectorIterator\npath[");
        sb.append(path).append("]\nbuf[\n").append(data).append("\n]");
        return sb.toString();
    }
}