Java Code Examples for org.springframework.expression.spel.SpelMessage#FUNCTION_MUST_BE_STATIC
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Example 1
Source File: FunctionReference.java From lams with GNU General Public License v2.0 | 5 votes |
/** * Execute a function represented as a java.lang.reflect.Method. * @param state the expression evaluation state * @param method the method to invoke * @return the return value of the invoked Java method * @throws EvaluationException if there is any problem invoking the method */ private TypedValue executeFunctionJLRMethod(ExpressionState state, Method method) throws EvaluationException { this.method = null; Object[] functionArgs = getArguments(state); if (!method.isVarArgs() && method.getParameterTypes().length != functionArgs.length) { throw new SpelEvaluationException(SpelMessage.INCORRECT_NUMBER_OF_ARGUMENTS_TO_FUNCTION, functionArgs.length, method.getParameterTypes().length); } // Only static methods can be called in this way if (!Modifier.isStatic(method.getModifiers())) { throw new SpelEvaluationException(getStartPosition(), SpelMessage.FUNCTION_MUST_BE_STATIC, ClassUtils.getQualifiedMethodName(method), this.name); } this.argumentConversionOccurred = false; // Convert arguments if necessary and remap them for varargs if required if (functionArgs != null) { TypeConverter converter = state.getEvaluationContext().getTypeConverter(); this.argumentConversionOccurred = ReflectionHelper.convertAllArguments(converter, functionArgs, method); } if (method.isVarArgs()) { functionArgs = ReflectionHelper.setupArgumentsForVarargsInvocation( method.getParameterTypes(), functionArgs); } try { ReflectionUtils.makeAccessible(method); Object result = method.invoke(method.getClass(), functionArgs); if (!argumentConversionOccurred) { this.method = method; this.exitTypeDescriptor = CodeFlow.toDescriptor(method.getReturnType()); } return new TypedValue(result, new TypeDescriptor(new MethodParameter(method, -1)).narrow(result)); } catch (Exception ex) { throw new SpelEvaluationException(getStartPosition(), ex, SpelMessage.EXCEPTION_DURING_FUNCTION_CALL, this.name, ex.getMessage()); } }
Example 2
Source File: FunctionReference.java From spring-analysis-note with MIT License | 4 votes |
/** * Execute a function represented as a {@code java.lang.reflect.Method}. * @param state the expression evaluation state * @param method the method to invoke * @return the return value of the invoked Java method * @throws EvaluationException if there is any problem invoking the method */ private TypedValue executeFunctionJLRMethod(ExpressionState state, Method method) throws EvaluationException { Object[] functionArgs = getArguments(state); if (!method.isVarArgs()) { int declaredParamCount = method.getParameterCount(); if (declaredParamCount != functionArgs.length) { throw new SpelEvaluationException(SpelMessage.INCORRECT_NUMBER_OF_ARGUMENTS_TO_FUNCTION, functionArgs.length, declaredParamCount); } } if (!Modifier.isStatic(method.getModifiers())) { throw new SpelEvaluationException(getStartPosition(), SpelMessage.FUNCTION_MUST_BE_STATIC, ClassUtils.getQualifiedMethodName(method), this.name); } // Convert arguments if necessary and remap them for varargs if required TypeConverter converter = state.getEvaluationContext().getTypeConverter(); boolean argumentConversionOccurred = ReflectionHelper.convertAllArguments(converter, functionArgs, method); if (method.isVarArgs()) { functionArgs = ReflectionHelper.setupArgumentsForVarargsInvocation( method.getParameterTypes(), functionArgs); } boolean compilable = false; try { ReflectionUtils.makeAccessible(method); Object result = method.invoke(method.getClass(), functionArgs); compilable = !argumentConversionOccurred; return new TypedValue(result, new TypeDescriptor(new MethodParameter(method, -1)).narrow(result)); } catch (Exception ex) { throw new SpelEvaluationException(getStartPosition(), ex, SpelMessage.EXCEPTION_DURING_FUNCTION_CALL, this.name, ex.getMessage()); } finally { if (compilable) { this.exitTypeDescriptor = CodeFlow.toDescriptor(method.getReturnType()); this.method = method; } else { this.exitTypeDescriptor = null; this.method = null; } } }
Example 3
Source File: FunctionReference.java From java-technology-stack with MIT License | 4 votes |
/** * Execute a function represented as a {@code java.lang.reflect.Method}. * @param state the expression evaluation state * @param method the method to invoke * @return the return value of the invoked Java method * @throws EvaluationException if there is any problem invoking the method */ private TypedValue executeFunctionJLRMethod(ExpressionState state, Method method) throws EvaluationException { Object[] functionArgs = getArguments(state); if (!method.isVarArgs()) { int declaredParamCount = method.getParameterCount(); if (declaredParamCount != functionArgs.length) { throw new SpelEvaluationException(SpelMessage.INCORRECT_NUMBER_OF_ARGUMENTS_TO_FUNCTION, functionArgs.length, declaredParamCount); } } if (!Modifier.isStatic(method.getModifiers())) { throw new SpelEvaluationException(getStartPosition(), SpelMessage.FUNCTION_MUST_BE_STATIC, ClassUtils.getQualifiedMethodName(method), this.name); } // Convert arguments if necessary and remap them for varargs if required TypeConverter converter = state.getEvaluationContext().getTypeConverter(); boolean argumentConversionOccurred = ReflectionHelper.convertAllArguments(converter, functionArgs, method); if (method.isVarArgs()) { functionArgs = ReflectionHelper.setupArgumentsForVarargsInvocation( method.getParameterTypes(), functionArgs); } boolean compilable = false; try { ReflectionUtils.makeAccessible(method); Object result = method.invoke(method.getClass(), functionArgs); compilable = !argumentConversionOccurred; return new TypedValue(result, new TypeDescriptor(new MethodParameter(method, -1)).narrow(result)); } catch (Exception ex) { throw new SpelEvaluationException(getStartPosition(), ex, SpelMessage.EXCEPTION_DURING_FUNCTION_CALL, this.name, ex.getMessage()); } finally { if (compilable) { this.exitTypeDescriptor = CodeFlow.toDescriptor(method.getReturnType()); this.method = method; } else { this.exitTypeDescriptor = null; this.method = null; } } }
Example 4
Source File: FunctionReference.java From spring4-understanding with Apache License 2.0 | 4 votes |
/** * Execute a function represented as a java.lang.reflect.Method. * @param state the expression evaluation state * @param method the method to invoke * @return the return value of the invoked Java method * @throws EvaluationException if there is any problem invoking the method */ private TypedValue executeFunctionJLRMethod(ExpressionState state, Method method) throws EvaluationException { this.method = null; Object[] functionArgs = getArguments(state); if (!method.isVarArgs() && method.getParameterTypes().length != functionArgs.length) { throw new SpelEvaluationException(SpelMessage.INCORRECT_NUMBER_OF_ARGUMENTS_TO_FUNCTION, functionArgs.length, method.getParameterTypes().length); } // Only static methods can be called in this way if (!Modifier.isStatic(method.getModifiers())) { throw new SpelEvaluationException(getStartPosition(), SpelMessage.FUNCTION_MUST_BE_STATIC, method.getDeclaringClass().getName() + "." + method.getName(), this.name); } argumentConversionOccurred = false; // Convert arguments if necessary and remap them for varargs if required if (functionArgs != null) { TypeConverter converter = state.getEvaluationContext().getTypeConverter(); argumentConversionOccurred = ReflectionHelper.convertAllArguments(converter, functionArgs, method); } if (method.isVarArgs()) { functionArgs = ReflectionHelper.setupArgumentsForVarargsInvocation(method.getParameterTypes(), functionArgs); } try { ReflectionUtils.makeAccessible(method); Object result = method.invoke(method.getClass(), functionArgs); if (!argumentConversionOccurred) { this.method = method; this.exitTypeDescriptor = CodeFlow.toDescriptor(method.getReturnType()); } return new TypedValue(result, new TypeDescriptor(new MethodParameter(method, -1)).narrow(result)); } catch (Exception ex) { throw new SpelEvaluationException(getStartPosition(), ex, SpelMessage.EXCEPTION_DURING_FUNCTION_CALL, this.name, ex.getMessage()); } }