| /******************************************************************************* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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 org.apache.olingo.odata2.core.edm; |
| |
| import org.apache.commons.codec.DecoderException; |
| import org.apache.commons.codec.binary.Base64; |
| import org.apache.commons.codec.binary.Hex; |
| import org.apache.olingo.odata2.api.edm.EdmFacets; |
| import org.apache.olingo.odata2.api.edm.EdmLiteralKind; |
| import org.apache.olingo.odata2.api.edm.EdmSimpleTypeException; |
| |
| /** |
| * Implementation of the EDM simple type Binary. |
| * |
| */ |
| public class EdmBinary extends AbstractSimpleType { |
| |
| private static final EdmBinary instance = new EdmBinary(); |
| |
| public static EdmBinary getInstance() { |
| return instance; |
| } |
| |
| @Override |
| public Class<?> getDefaultType() { |
| return byte[].class; |
| } |
| |
| @Override |
| public boolean validate(final String value, final EdmLiteralKind literalKind, final EdmFacets facets) { |
| if (value == null) { |
| return facets == null || facets.isNullable() == null || facets.isNullable(); |
| } |
| |
| if (literalKind == null) { |
| return false; |
| } |
| |
| return validateLiteral(value, literalKind) && validateMaxLength(value, literalKind, facets); |
| } |
| |
| private static boolean validateLiteral(final String value, final EdmLiteralKind literalKind) { |
| return literalKind == EdmLiteralKind.URI ? |
| value.matches("(?:X|binary)'(?:\\p{XDigit}{2})*'") : Base64.isBase64(value); |
| } |
| |
| private static boolean |
| validateMaxLength(final String value, final EdmLiteralKind literalKind, final EdmFacets facets) { |
| return facets == null || facets.getMaxLength() == null ? true : |
| literalKind == EdmLiteralKind.URI ? |
| // In URI representation, each byte is represented as two hexadecimal digits; |
| // additionally, we have to account for the prefix and the surrounding "'"s. |
| facets.getMaxLength() >= (value.length() - (value.startsWith("X") ? 3 : 8)) / 2 |
| : |
| // In default representation, every three bytes are represented as four base-64 characters. |
| // Additionally, there could be up to two padding "=" characters if the number of bytes is |
| // not a multiple of three, and there could be line feeds, possibly with carriage returns. |
| facets.getMaxLength() * 4L >= (value.length() - crlfLength(value)) * 3L |
| - (value.contains("==") ? 2 : value.contains("=") ? 1 : 0) * 4L; |
| } |
| |
| private static int crlfLength(final String value) { |
| int result = 0; |
| int index = 0; |
| while ((index = value.indexOf('\n', index)) >= 0) { |
| result += index > 0 && value.charAt(index - 1) == '\r' ? 2 : 1; |
| index++; |
| } |
| return result; |
| } |
| |
| @Override |
| protected <T> T internalValueOfString(final String value, final EdmLiteralKind literalKind, final EdmFacets facets, |
| final Class<T> returnType) throws EdmSimpleTypeException { |
| if (!validateLiteral(value, literalKind)) { |
| throw new EdmSimpleTypeException(EdmSimpleTypeException.LITERAL_ILLEGAL_CONTENT.addContent(value)); |
| } |
| if (!validateMaxLength(value, literalKind, facets)) { |
| throw new EdmSimpleTypeException(EdmSimpleTypeException.LITERAL_FACETS_NOT_MATCHED.addContent(value, facets)); |
| } |
| |
| byte[] result; |
| if (literalKind == EdmLiteralKind.URI) { |
| try { |
| result = Hex.decodeHex(value.substring(value.startsWith("X") ? 2 : 7, value.length() - 1).toCharArray()); |
| } catch (final DecoderException e) { |
| throw new EdmSimpleTypeException(EdmSimpleTypeException.LITERAL_ILLEGAL_CONTENT.addContent(value), e); |
| } |
| } else { |
| result = Base64.decodeBase64(value); |
| } |
| |
| if (returnType.isAssignableFrom(byte[].class)) { |
| return returnType.cast(result); |
| } else if (returnType.isAssignableFrom(Byte[].class)) { |
| Byte[] byteArray = new Byte[result.length]; |
| for (int i = 0; i < result.length; i++) { |
| byteArray[i] = result[i]; |
| } |
| return returnType.cast(byteArray); |
| } else { |
| throw new EdmSimpleTypeException(EdmSimpleTypeException.VALUE_TYPE_NOT_SUPPORTED.addContent(returnType)); |
| } |
| } |
| |
| @Override |
| protected <T> String internalValueToString(final T value, final EdmLiteralKind literalKind, final EdmFacets facets) |
| throws EdmSimpleTypeException { |
| byte[] byteArrayValue; |
| if (value instanceof byte[]) { |
| byteArrayValue = (byte[]) value; |
| } else if (value instanceof Byte[]) { |
| final int length = ((Byte[]) value).length; |
| byteArrayValue = new byte[length]; |
| for (int i = 0; i < length; i++) { |
| byteArrayValue[i] = ((Byte[]) value)[i].byteValue(); |
| } |
| } else { |
| throw new EdmSimpleTypeException(EdmSimpleTypeException.VALUE_TYPE_NOT_SUPPORTED.addContent(value.getClass())); |
| } |
| |
| if (facets != null && facets.getMaxLength() != null && byteArrayValue.length > facets.getMaxLength()) { |
| throw new EdmSimpleTypeException(EdmSimpleTypeException.VALUE_FACETS_NOT_MATCHED.addContent(value, facets)); |
| } |
| |
| return Base64.encodeBase64String(byteArrayValue); |
| } |
| |
| @Override |
| public String toUriLiteral(final String literal) throws EdmSimpleTypeException { |
| return "binary'" + String.valueOf(Hex.encodeHex(Base64.decodeBase64(literal), false)) + "'"; |
| } |
| } |