package org.infinispan.persistence.keymappers; import java.util.Base64; import org.infinispan.commons.marshall.WrappedByteArray; import org.infinispan.util.logging.Log; import org.infinispan.util.logging.LogFactory; /** * Default implementation for {@link TwoWayKey2StringMapper} that knows how to handle all primitive * wrapper keys and Strings. * * @author Mircea.Markus@jboss.com * @author Tristan Tarrant * * @since 4.1 */ public class DefaultTwoWayKey2StringMapper implements TwoWayKey2StringMapper { private static final Log log = LogFactory.getLog(DefaultTwoWayKey2StringMapper.class); private static final char NON_STRING_PREFIX = '\uFEFF'; private static final char SHORT_IDENTIFIER = '1'; private static final char BYTE_IDENTIFIER = '2'; private static final char LONG_IDENTIFIER = '3'; private static final char INTEGER_IDENTIFIER = '4'; private static final char DOUBLE_IDENTIFIER = '5'; private static final char FLOAT_IDENTIFIER = '6'; private static final char BOOLEAN_IDENTIFIER = '7'; private static final char BYTEARRAYKEY_IDENTIFIER = '8'; private static final char NATIVE_BYTEARRAYKEY_IDENTIFIER = '9'; @Override public String getStringMapping(Object key) { char identifier; if (key.getClass().equals(String.class)) { return key.toString(); } else if (key.getClass().equals(Short.class)) { identifier = SHORT_IDENTIFIER; } else if (key.getClass().equals(Byte.class)) { identifier = BYTE_IDENTIFIER; } else if (key.getClass().equals(Long.class)) { identifier = LONG_IDENTIFIER; } else if (key.getClass().equals(Integer.class)) { identifier = INTEGER_IDENTIFIER; } else if (key.getClass().equals(Double.class)) { identifier = DOUBLE_IDENTIFIER; } else if (key.getClass().equals(Float.class)) { identifier = FLOAT_IDENTIFIER; } else if (key.getClass().equals(Boolean.class)) { identifier = BOOLEAN_IDENTIFIER; } else if (key.getClass().equals(WrappedByteArray.class)) { return generateString(BYTEARRAYKEY_IDENTIFIER, Base64.getEncoder().encodeToString(((WrappedByteArray)key).getBytes())); } else if (key.getClass().equals(byte[].class)) { return generateString(NATIVE_BYTEARRAYKEY_IDENTIFIER, Base64.getEncoder().encodeToString((byte[]) key)); } else { throw new IllegalArgumentException("Unsupported key type: " + key.getClass().getName()); } return generateString(identifier, key.toString()); } @Override public Object getKeyMapping(String key) { log.tracef("Get mapping for key: %s", key); if (key.length() > 0 && key.charAt(0) == NON_STRING_PREFIX) { char type = key.charAt(1); String value = key.substring(2); switch (type) { case SHORT_IDENTIFIER: return Short.parseShort(value); case BYTE_IDENTIFIER: return Byte.parseByte(value); case LONG_IDENTIFIER: return Long.parseLong(value); case INTEGER_IDENTIFIER: return Integer.parseInt(value); case DOUBLE_IDENTIFIER: return Double.parseDouble(value); case FLOAT_IDENTIFIER: return Float.parseFloat(value); case BOOLEAN_IDENTIFIER: return Boolean.parseBoolean(value); case BYTEARRAYKEY_IDENTIFIER: byte[] bytes = Base64.getDecoder().decode(value); return new WrappedByteArray(bytes); case NATIVE_BYTEARRAYKEY_IDENTIFIER: return Base64.getDecoder().decode(value); default: throw new IllegalArgumentException("Unsupported type code: " + type); } } else { return key; } } @Override public boolean isSupportedType(Class<?> keyType) { return isPrimitive(keyType) || keyType == WrappedByteArray.class; } private String generateString(char identifier, String s) { return String.valueOf(NON_STRING_PREFIX) + String.valueOf(identifier) + s; } private static boolean isPrimitive(Class<?> key) { return key == String.class || key == Short.class || key == Byte.class || key == Long.class || key == Integer.class || key == Double.class || key == Float.class || key == Boolean.class || key == byte[].class; } }