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SpelMessage.java
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SpelMessage.java
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/*
* Copyright 2002-2022 the original author or authors.
*
* 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
*
* https://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.springframework.expression.spel;
import java.text.MessageFormat;
/**
* Contains all the messages that can be produced by the Spring Expression Language.
* Each message has a kind (info, warn, error) and a code number. Tests can be written to
* expect particular code numbers rather than particular text, enabling the message text
* to more easily be modified and the tests to run successfully in different locales.
*
* <p>When a message is formatted, it will have this kind of form, capturing the prefix
* and the error kind, including the position if it is known:
*
* <pre class="code">
* EL1004E:(pos 34): Type cannot be found 'String'
* </pre>
*
* @author Andy Clement
* @author Juergen Hoeller
* @author Sam Brannen
* @since 3.0
*/
public enum SpelMessage {
TYPE_CONVERSION_ERROR(Kind.ERROR, 1001,
"Type conversion problem, cannot convert from {0} to {1}"),
CONSTRUCTOR_NOT_FOUND(Kind.ERROR, 1002,
"Constructor call: No suitable constructor found on type {0} for arguments {1}"),
CONSTRUCTOR_INVOCATION_PROBLEM(Kind.ERROR, 1003,
"A problem occurred whilst attempting to construct an object of type ''{0}'' using arguments ''{1}''"),
METHOD_NOT_FOUND(Kind.ERROR, 1004,
"Method call: Method {0} cannot be found on {1} type"),
TYPE_NOT_FOUND(Kind.ERROR, 1005,
"Type cannot be found ''{0}''"),
FUNCTION_NOT_DEFINED(Kind.ERROR, 1006,
"The function ''{0}'' could not be found"),
PROPERTY_OR_FIELD_NOT_READABLE_ON_NULL(Kind.ERROR, 1007,
"Property or field ''{0}'' cannot be found on null"),
PROPERTY_OR_FIELD_NOT_READABLE(Kind.ERROR, 1008,
"Property or field ''{0}'' cannot be found on object of type ''{1}'' - maybe not public?"),
PROPERTY_OR_FIELD_NOT_WRITABLE_ON_NULL(Kind.ERROR, 1009,
"Property or field ''{0}'' cannot be set on null"),
PROPERTY_OR_FIELD_NOT_WRITABLE(Kind.ERROR, 1010,
"Property or field ''{0}'' cannot be set on object of type ''{1}'' - maybe not public?"),
METHOD_CALL_ON_NULL_OBJECT_NOT_ALLOWED(Kind.ERROR, 1011,
"Method call: Attempted to call method {0} on null context object"),
CANNOT_INDEX_INTO_NULL_VALUE(Kind.ERROR, 1012,
"Cannot index into a null value"),
NOT_COMPARABLE(Kind.ERROR, 1013,
"Cannot compare instances of {0} and {1}"),
INCORRECT_NUMBER_OF_ARGUMENTS_TO_FUNCTION(Kind.ERROR, 1014,
"Incorrect number of arguments for function, {0} supplied but function takes {1}"),
INVALID_TYPE_FOR_SELECTION(Kind.ERROR, 1015,
"Cannot perform selection on input data of type ''{0}''"),
RESULT_OF_SELECTION_CRITERIA_IS_NOT_BOOLEAN(Kind.ERROR, 1016,
"Result of selection criteria is not boolean"),
BETWEEN_RIGHT_OPERAND_MUST_BE_TWO_ELEMENT_LIST(Kind.ERROR, 1017,
"Right operand for the 'between' operator has to be a two-element list"),
INVALID_PATTERN(Kind.ERROR, 1018,
"Pattern is not valid ''{0}''"),
PROJECTION_NOT_SUPPORTED_ON_TYPE(Kind.ERROR, 1019,
"Projection is not supported on the type ''{0}''"),
ARGLIST_SHOULD_NOT_BE_EVALUATED(Kind.ERROR, 1020,
"The argument list of a lambda expression should never have getValue() called upon it"),
EXCEPTION_DURING_PROPERTY_READ(Kind.ERROR, 1021,
"A problem occurred whilst attempting to access the property ''{0}'': ''{1}''"),
FUNCTION_REFERENCE_CANNOT_BE_INVOKED(Kind.ERROR, 1022,
"The function ''{0}'' mapped to an object of type ''{1}'' which cannot be invoked"),
EXCEPTION_DURING_FUNCTION_CALL(Kind.ERROR, 1023,
"A problem occurred whilst attempting to invoke the function ''{0}'': ''{1}''"),
ARRAY_INDEX_OUT_OF_BOUNDS(Kind.ERROR, 1024,
"The array has ''{0}'' elements, index ''{1}'' is invalid"),
COLLECTION_INDEX_OUT_OF_BOUNDS(Kind.ERROR, 1025,
"The collection has ''{0}'' elements, index ''{1}'' is invalid"),
STRING_INDEX_OUT_OF_BOUNDS(Kind.ERROR, 1026,
"The string has ''{0}'' characters, index ''{1}'' is invalid"),
INDEXING_NOT_SUPPORTED_FOR_TYPE(Kind.ERROR, 1027,
"Indexing into type ''{0}'' is not supported"),
INSTANCEOF_OPERATOR_NEEDS_CLASS_OPERAND(Kind.ERROR, 1028,
"The operator 'instanceof' needs the right operand to be a class, not a ''{0}''"),
EXCEPTION_DURING_METHOD_INVOCATION(Kind.ERROR, 1029,
"A problem occurred when trying to execute method ''{0}'' on object of type ''{1}'': ''{2}''"),
OPERATOR_NOT_SUPPORTED_BETWEEN_TYPES(Kind.ERROR, 1030,
"The operator ''{0}'' is not supported between objects of type ''{1}'' and ''{2}''"),
PROBLEM_LOCATING_METHOD(Kind.ERROR, 1031,
"Problem locating method {0} on type {1}"),
SETVALUE_NOT_SUPPORTED( Kind.ERROR, 1032,
"setValue(ExpressionState, Object) not supported for ''{0}''"),
MULTIPLE_POSSIBLE_METHODS(Kind.ERROR, 1033,
"Method call of ''{0}'' is ambiguous, supported type conversions allow multiple variants to match"),
EXCEPTION_DURING_PROPERTY_WRITE(Kind.ERROR, 1034,
"A problem occurred whilst attempting to set the property ''{0}'': {1}"),
NOT_AN_INTEGER(Kind.ERROR, 1035,
"The value ''{0}'' cannot be parsed as an int"),
NOT_A_LONG(Kind.ERROR, 1036,
"The value ''{0}'' cannot be parsed as a long"),
INVALID_FIRST_OPERAND_FOR_MATCHES_OPERATOR(Kind.ERROR, 1037,
"First operand to matches operator must be a string. ''{0}'' is not"),
INVALID_SECOND_OPERAND_FOR_MATCHES_OPERATOR(Kind.ERROR, 1038,
"Second operand to matches operator must be a string. ''{0}'' is not"),
FUNCTION_MUST_BE_STATIC(Kind.ERROR, 1039,
"Only static methods can be called via function references. " +
"The method ''{0}'' referred to by name ''{1}'' is not static."),
NOT_A_REAL(Kind.ERROR, 1040,
"The value ''{0}'' cannot be parsed as a double"),
MORE_INPUT(Kind.ERROR,1041,
"After parsing a valid expression, there is still more data in the expression: ''{0}''"),
RIGHT_OPERAND_PROBLEM(Kind.ERROR, 1042,
"Problem parsing right operand"),
NOT_EXPECTED_TOKEN(Kind.ERROR, 1043,
"Unexpected token. Expected ''{0}'' but was ''{1}''"),
OOD(Kind.ERROR, 1044,
"Unexpectedly ran out of input"),
NON_TERMINATING_DOUBLE_QUOTED_STRING(Kind.ERROR, 1045,
"Cannot find terminating \" for string"),
NON_TERMINATING_QUOTED_STRING(Kind.ERROR, 1046,
"Cannot find terminating '' for string"),
MISSING_LEADING_ZERO_FOR_NUMBER(Kind.ERROR, 1047,
"A real number must be prefixed by zero, it cannot start with just ''.''"),
REAL_CANNOT_BE_LONG(Kind.ERROR, 1048,
"Real number cannot be suffixed with a long (L or l) suffix"),
UNEXPECTED_DATA_AFTER_DOT(Kind.ERROR, 1049,
"Unexpected data after ''.'': ''{0}''"),
MISSING_CONSTRUCTOR_ARGS(Kind.ERROR, 1050,
"The arguments '(...)' for the constructor call are missing"),
RUN_OUT_OF_ARGUMENTS(Kind.ERROR, 1051,
"Unexpectedly ran out of arguments"),
UNABLE_TO_GROW_COLLECTION(Kind.ERROR, 1052,
"Unable to grow collection"),
UNABLE_TO_GROW_COLLECTION_UNKNOWN_ELEMENT_TYPE(Kind.ERROR, 1053,
"Unable to grow collection: unable to determine list element type"),
UNABLE_TO_CREATE_LIST_FOR_INDEXING(Kind.ERROR, 1054,
"Unable to dynamically create a List to replace a null value"),
UNABLE_TO_CREATE_MAP_FOR_INDEXING(Kind.ERROR, 1055,
"Unable to dynamically create a Map to replace a null value"),
UNABLE_TO_DYNAMICALLY_CREATE_OBJECT(Kind.ERROR, 1056,
"Unable to dynamically create instance of ''{0}'' to replace a null value"),
NO_BEAN_RESOLVER_REGISTERED(Kind.ERROR, 1057,
"No bean resolver registered in the context to resolve access to bean ''{0}''"),
EXCEPTION_DURING_BEAN_RESOLUTION(Kind.ERROR, 1058,
"A problem occurred when trying to resolve bean ''{0}'':''{1}''"),
INVALID_BEAN_REFERENCE(Kind.ERROR, 1059,
"@ can only be followed by an identifier or a quoted name"),
TYPE_NAME_EXPECTED_FOR_ARRAY_CONSTRUCTION(Kind.ERROR, 1060,
"Expected the type of the new array to be specified as a String but found ''{0}''"),
INCORRECT_ELEMENT_TYPE_FOR_ARRAY(Kind.ERROR, 1061,
"The array of type ''{0}'' cannot have an element of type ''{1}'' inserted"),
MULTIDIM_ARRAY_INITIALIZER_NOT_SUPPORTED(Kind.ERROR, 1062,
"Using an initializer to build a multi-dimensional array is not currently supported"),
MISSING_ARRAY_DIMENSION(Kind.ERROR, 1063,
"A required array dimension has not been specified"),
INITIALIZER_LENGTH_INCORRECT(Kind.ERROR, 1064,
"array initializer size does not match array dimensions"),
UNEXPECTED_ESCAPE_CHAR(Kind.ERROR, 1065, "unexpected escape character."),
OPERAND_NOT_INCREMENTABLE(Kind.ERROR, 1066,
"the expression component ''{0}'' does not support increment"),
OPERAND_NOT_DECREMENTABLE(Kind.ERROR, 1067,
"the expression component ''{0}'' does not support decrement"),
NOT_ASSIGNABLE(Kind.ERROR, 1068,
"the expression component ''{0}'' is not assignable"),
MISSING_CHARACTER(Kind.ERROR, 1069,
"missing expected character ''{0}''"),
LEFT_OPERAND_PROBLEM(Kind.ERROR, 1070,
"Problem parsing left operand"),
MISSING_SELECTION_EXPRESSION(Kind.ERROR, 1071,
"A required selection expression has not been specified"),
/** @since 4.1 */
EXCEPTION_RUNNING_COMPILED_EXPRESSION(Kind.ERROR, 1072,
"An exception occurred whilst evaluating a compiled expression"),
/** @since 4.3.17 */
FLAWED_PATTERN(Kind.ERROR, 1073,
"Failed to efficiently evaluate pattern ''{0}'': consider redesigning it"),
/** @since 5.2.20 */
MAX_ARRAY_ELEMENTS_THRESHOLD_EXCEEDED(Kind.ERROR, 1075,
"Array declares too many elements, exceeding the threshold of ''{0}''");
private final Kind kind;
private final int code;
private final String message;
SpelMessage(Kind kind, int code, String message) {
this.kind = kind;
this.code = code;
this.message = message;
}
/**
* Produce a complete message including the prefix, the position (if known)
* and with the inserts applied to the message.
* @param pos the position (ignored and not included in the message if less than 0)
* @param inserts the inserts to put into the formatted message
* @return a formatted message
*/
public String formatMessage(int pos, Object... inserts) {
StringBuilder formattedMessage = new StringBuilder();
formattedMessage.append("EL").append(this.code);
switch (this.kind) {
case ERROR:
formattedMessage.append("E");
break;
}
formattedMessage.append(":");
if (pos != -1) {
formattedMessage.append("(pos ").append(pos).append("): ");
}
formattedMessage.append(MessageFormat.format(this.message, inserts));
return formattedMessage.toString();
}
public enum Kind { INFO, WARNING, ERROR }
}