106 lines
3.2 KiB
Java
106 lines
3.2 KiB
Java
package ch.dissem.msgpack.types;
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import ch.dissem.msgpack.Reader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.nio.ByteBuffer;
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import java.util.Iterator;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import java.util.Objects;
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public class MPMap<K extends MPType, V extends MPType> implements MPType<Map<K, V>> {
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private Map<K, V> map;
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public MPMap(Map<K, V> map) {
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this.map = map;
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}
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@Override
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public Map<K, V> getValue() {
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return map;
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}
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public void pack(OutputStream out) throws IOException {
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int size = map.size();
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if (size < 16) {
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out.write(0x80 + size);
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} else if (size < 65536) {
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out.write(0xDE);
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out.write(ByteBuffer.allocate(2).putShort((short) size).array());
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} else {
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out.write(0xDF);
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out.write(ByteBuffer.allocate(4).putInt(size).array());
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}
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for (Map.Entry<K, V> e : map.entrySet()) {
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e.getKey().pack(out);
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e.getValue().pack(out);
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}
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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MPMap<?, ?> mpMap = (MPMap<?, ?>) o;
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return Objects.equals(map, mpMap.map);
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}
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@Override
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public int hashCode() {
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return Objects.hash(map);
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}
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@Override
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public String toString() {
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StringBuilder result = new StringBuilder();
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result.append('{');
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Iterator<Map.Entry<K, V>> iterator = map.entrySet().iterator();
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while (iterator.hasNext()) {
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Map.Entry<K, V> item = iterator.next();
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result.append(item.getKey().toString());
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result.append(": ");
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result.append(item.getValue().toString());
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if (iterator.hasNext()) {
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result.append(", ");
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}
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}
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result.append('}');
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return result.toString();
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}
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public static class Unpacker implements MPType.Unpacker<MPMap> {
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private final Reader reader;
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public Unpacker(Reader reader) {
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this.reader = reader;
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}
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public boolean is(int firstByte) {
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return firstByte == 0xDE || firstByte == 0xDF || (firstByte & 0xF0) == 0x80;
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}
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public MPMap<MPType<?>, MPType<?>> unpack(int firstByte, InputStream in) throws IOException {
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int size;
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if ((firstByte & 0xF0) == 0x80) {
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size = firstByte & 0x0F;
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} else if (firstByte == 0xDE) {
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size = in.read() << 8 | in.read();
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} else if (firstByte == 0xDF) {
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size = in.read() << 24 | in.read() << 16 | in.read() << 8 | in.read();
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} else {
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throw new IllegalArgumentException(String.format("Unexpected first byte 0x%02x", firstByte));
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}
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Map<MPType<?>, MPType<?>> map = new LinkedHashMap<>();
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for (int i = 0; i < size; i++) {
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MPType key = reader.read(in);
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MPType value = reader.read(in);
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map.put(key, value);
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}
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return new MPMap<>(map);
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}
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}
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}
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