39 lines
908 B
Java
39 lines
908 B
Java
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package com.iluwatar.abstractdocument;
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import java.util.List;
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import java.util.Map;
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import java.util.Objects;
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import java.util.function.Function;
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import java.util.stream.Stream;
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public abstract class AbstractDocument implements Document {
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private final Map<String, Object> properties;
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protected AbstractDocument(Map<String, Object> properties) {
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Objects.requireNonNull(properties, "properties map is required");
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this.properties = properties;
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}
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@Override
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public Void put(String key, Object value) {
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properties.put(key, value);
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return null;
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}
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@Override
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public Object get(String key) {
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return properties.get(key);
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}
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@Override
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public <T> Stream<T> children(String key, Function<Map<String, Object>, T> constructor) {
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return Stream.of(get(key))
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.filter(el -> el != null)
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.map(el -> (List<Map<String, Object>>) el)
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.findFirst().get().stream()
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.map(constructor);
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}
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}
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