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package org.apache.camel.component.bean; |
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import java.lang.reflect.AccessibleObject; |
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import java.lang.reflect.InvocationTargetException; |
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import java.lang.reflect.Method; |
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import java.util.Arrays; |
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import java.util.List; |
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import org.apache.camel.Exchange; |
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import org.apache.camel.Expression; |
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import org.apache.camel.util.ObjectHelper; |
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public class MethodInfo { |
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private Class type; |
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private Method method; |
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private final List<ParameterInfo> parameters; |
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private final List<ParameterInfo> bodyParameters; |
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private Expression parametersExpression; |
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public MethodInfo(Class type, Method method, List<ParameterInfo> parameters, List<ParameterInfo> bodyParameters) { |
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this.type = type; |
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this.method = method; |
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this.parameters = parameters; |
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this.bodyParameters = bodyParameters; |
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this.parametersExpression = createParametersExpression(); |
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} |
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public String toString() { |
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return method.toString(); |
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} |
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public MethodInvocation createMethodInvocation(final Object pojo, final Exchange messageExchange) { |
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final Object[] arguments = (Object[]) parametersExpression.evaluate(messageExchange); |
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return new MethodInvocation() { |
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public Method getMethod() { |
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return method; |
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} |
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public Object[] getArguments() { |
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return arguments; |
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} |
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public Object proceed() throws Throwable { |
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return invoke(method, pojo, arguments, messageExchange); |
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} |
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public Object getThis() { |
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return pojo; |
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} |
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public AccessibleObject getStaticPart() { |
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return method; |
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} |
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}; |
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} |
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public Class getType() { |
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return type; |
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} |
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public Method getMethod() { |
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return method; |
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} |
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public Expression getParametersExpression() { |
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return parametersExpression; |
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} |
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public List<ParameterInfo> getBodyParameters() { |
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return bodyParameters; |
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} |
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public Class getBodyParameterType() { |
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ParameterInfo parameterInfo = bodyParameters.get(0); |
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return parameterInfo.getType(); |
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} |
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public boolean bodyParameterMatches(Class bodyType) { |
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Class actualType = getBodyParameterType(); |
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return actualType != null && ObjectHelper.isAssignableFrom(bodyType, actualType); |
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} |
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public List<ParameterInfo> getParameters() { |
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return parameters; |
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} |
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public boolean hasBodyParameter() { |
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return !bodyParameters.isEmpty(); |
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} |
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protected Object invoke(Method mth, Object pojo, Object[] arguments, Exchange exchange) throws IllegalAccessException, InvocationTargetException { |
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return mth.invoke(pojo, arguments); |
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} |
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protected Expression createParametersExpression() { |
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final int size = parameters.size(); |
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final Expression[] expressions = new Expression[size]; |
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for (int i = 0; i < size; i++) { |
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Expression parameterExpression = parameters.get(i).getExpression(); |
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expressions[i] = parameterExpression; |
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} |
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return new Expression<Exchange>() { |
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public Object evaluate(Exchange exchange) { |
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Object[] answer = new Object[size]; |
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for (int i = 0; i < size; i++) { |
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answer[i] = expressions[i].evaluate(exchange); |
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} |
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return answer; |
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} |
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@Override |
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public String toString() { |
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return "ParametersExpression: " + Arrays.asList(expressions); |
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} |
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}; |
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} |
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} |