org.apache.tomcat.util.xreflection.SetPropertyClass Maven / Gradle / Ivy
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* 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.tomcat.util.xreflection;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Set;
import java.util.TreeSet;
import org.apache.tomcat.util.IntrospectionUtils;
final class SetPropertyClass implements Comparable {
static final String OBJECT_VAR_NAME = "o";
static final String NAME_VAR_NAME = "name";
static final String VALUE_VAR_NAME = "value";
static final String SETP_VAR_NAME = "invokeSetProperty";
private final SetPropertyClass parent;
private final Class clazz;
private Set children = new TreeSet<>();
private Set properties = new TreeSet<>();
private final boolean isAbstract;
private final Method genericSetPropertyMethod;
private final Method genericGetPropertyMethod;
SetPropertyClass(Class clazz, SetPropertyClass parent) {
this.clazz = clazz;
this.parent = parent;
this.isAbstract = Modifier.isAbstract(clazz.getModifiers());
Method classSetter, classGetter;
try {
classSetter = clazz.getDeclaredMethod("setProperty", String.class, String.class);
} catch (NoSuchMethodException e) {
try {
classSetter = clazz.getDeclaredMethod("setProperty", String.class, Object.class);
} catch (NoSuchMethodException x) {
classSetter = null;
}
}
try {
classGetter = clazz.getDeclaredMethod("getProperty", String.class);
} catch (NoSuchMethodException e) {
classGetter = null;
}
genericSetPropertyMethod = classSetter;
genericGetPropertyMethod = classGetter;
}
boolean isAbstract() {
return isAbstract;
}
void addSubClass(SetPropertyClass clazz) {
this.children.add(clazz);
}
boolean isBaseClass() {
return parent == null;
}
public Set getChildren() {
return children;
}
public Set getProperties() {
return properties;
}
public Method getGenericSetPropertyMethod() {
return genericSetPropertyMethod;
}
public Method getGenericGetPropertyMethod() {
return genericGetPropertyMethod;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
SetPropertyClass that = (SetPropertyClass) o;
return clazz.equals(that.clazz);
}
@Override
public int hashCode() {
return clazz.hashCode();
}
public SetPropertyClass getParent() {
return parent;
}
public Class getClazz() {
return clazz;
}
@Override
public String toString() {
final StringBuffer sb = new StringBuffer("SetPropertyClass{");
sb.append("clazz=").append(clazz.getName());
sb.append('}');
return sb.toString();
}
public void addProperty(ReflectionProperty property) {
properties.add(property);
}
public String generateSetPropertyMethod(ReflectionProperty property) {
//this property has a setProperty method
if (property.hasSetPropertySetter()) {
return "((" + this.getClazz().getName().replace('$','.') + ")" + OBJECT_VAR_NAME + ")." +
property.getSetMethod().getName() + "(" + NAME_VAR_NAME + ", " + VALUE_VAR_NAME + ");";
}
//direct setter
if (property.hasSetter()) {
return "((" + this.getClazz().getName().replace('$','.') + ")" + OBJECT_VAR_NAME + ")." +
property.getSetMethod().getName() + "(" + property.getConversion(VALUE_VAR_NAME) + ");";
}
return null;
}
public String generateGetPropertyMethod(ReflectionProperty property) {
//this property has a getProperty method
if (property.hasGetPropertyGetter()) {
return "result = ((" + this.getClazz().getName().replace('$','.') + ")" + OBJECT_VAR_NAME + ")." +
property.getGetMethod().getName() + "(" + NAME_VAR_NAME + ");";
}
//direct getter
if (property.hasGetter()) {
return "result = ((" + this.getClazz().getName().replace('$','.') + ")" + OBJECT_VAR_NAME + ")." +
property.getGetMethod().getName() + "();";
}
return null;
}
public String generateSetPropertyForMethod() {
StringBuilder code = new StringBuilder(ReflectionLessCodeGenerator.getIndent(1))
.append(generatesSetPropertyForMethodHeader())
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(2))
.append("switch (")
.append(NAME_VAR_NAME)
.append(") {")
.append(System.lineSeparator());
//case statements for each property
for (ReflectionProperty property : getProperties()) {
String invocation = generateSetPropertyMethod(property);
if (invocation != null) {
code.append(ReflectionLessCodeGenerator.getIndent(3))
.append("case \"")
.append(property.getPropertyName())
.append("\" : ")
.append(System.lineSeparator());
code.append(ReflectionLessCodeGenerator.getIndent(4))
.append(invocation)
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(4))
.append("return true;")
.append(System.lineSeparator())
;
} else {
code.append(ReflectionLessCodeGenerator.getIndent(3))
.append("//no set" + IntrospectionUtils.capitalize(property.getPropertyName())+ " method found on this class")
.append(System.lineSeparator())
;
}
}
//end switch statement
code.append(ReflectionLessCodeGenerator.getIndent(2))
.append("}")
.append(System.lineSeparator());
//we have a generic setProperty(String, String) method, invoke it
if (getGenericSetPropertyMethod() != null) {
ReflectionProperty p = new ReflectionProperty(
clazz.getName(),
"property",
String.class,
getGenericSetPropertyMethod(),
null
);
code.append(ReflectionLessCodeGenerator.getIndent(2))
.append("if (")
.append(SETP_VAR_NAME)
.append(") {")
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(3))
.append(generateSetPropertyMethod(p))
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(3))
.append("return true;")
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(2))
.append("}")
.append(System.lineSeparator());
}
//invoke parent or return false
code.append(ReflectionLessCodeGenerator.getIndent(2))
.append("return ")
.append(getSetPropertyForExitStatement())
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(1))
.append("}");
return code.toString();
}
private String getSetPropertyForExitStatement() {
return (getParent() != null) ?
//invoke the parent if we have one
getParent().generateParentSetPropertyForMethodInvocation() :
//if we invoke setProperty, return true, return false otherwise
getGenericSetPropertyMethod() != null ? "true;" : "false;";
}
public String generateInvocationSetForPropertyCaseStatement(int level) {
StringBuilder code = new StringBuilder(ReflectionLessCodeGenerator.getIndent(level))
.append("case \"")
.append(getClazz().getName())
.append("\" : ")
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(level+1))
.append("return ")
.append(generateParentSetPropertyForMethodInvocation())
.append(System.lineSeparator());
return code.toString();
}
public String generateParentSetPropertyForMethodInvocation() {
String[] classParts = clazz.getName().split("\\.|\\$");
StringBuilder methodInvocation = new StringBuilder("setPropertyFor");
for (String s : classParts) {
methodInvocation.append(IntrospectionUtils.capitalize(s));
}
methodInvocation.append("(")
.append(OBJECT_VAR_NAME)
.append(", ")
.append(NAME_VAR_NAME)
.append(", ")
.append(VALUE_VAR_NAME)
.append(", ")
.append(SETP_VAR_NAME)
.append(");");
return methodInvocation.toString();
}
public String generatesSetPropertyForMethodHeader() {
String[] classParts = clazz.getName().split("\\.|\\$");
StringBuilder methodInvocation = new StringBuilder("private static boolean setPropertyFor");
for (String s : classParts) {
methodInvocation.append(IntrospectionUtils.capitalize(s));
}
methodInvocation.append("(Object ")
.append(OBJECT_VAR_NAME)
.append(", String ")
.append(NAME_VAR_NAME)
.append(", String ")
.append(VALUE_VAR_NAME)
.append(", boolean ")
.append(SETP_VAR_NAME)
.append(") {");
return methodInvocation.toString();
}
public String generateInvocationGetForPropertyCaseStatement(int level) {
StringBuilder code = new StringBuilder(ReflectionLessCodeGenerator.getIndent(level))
.append("case \"")
.append(getClazz().getName())
.append("\" : ")
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(level+1))
.append("result = ")
.append(generateParentGetPropertyForMethodInvocation())
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(level+1))
.append("break;")
.append(System.lineSeparator())
;
return code.toString();
}
public String generateParentGetPropertyForMethodInvocation() {
String[] classParts = clazz.getName().split("\\.|\\$");
StringBuilder methodInvocation = new StringBuilder("getPropertyFor");
for (String s : classParts) {
methodInvocation.append(IntrospectionUtils.capitalize(s));
}
methodInvocation.append("(")
.append(OBJECT_VAR_NAME)
.append(", ")
.append(NAME_VAR_NAME)
.append(");");
return methodInvocation.toString();
}
public String generatesGetPropertyForMethodHeader() {
String[] classParts = clazz.getName().split("\\.|\\$");
StringBuilder methodInvocation = new StringBuilder("private static Object getPropertyFor");
for (String s : classParts) {
methodInvocation.append(IntrospectionUtils.capitalize(s));
}
methodInvocation.append("(Object ")
.append(OBJECT_VAR_NAME)
.append(", String ")
.append(NAME_VAR_NAME)
.append(") {");
return methodInvocation.toString();
}
private String getGetPropertyForExitStatement() {
if (getParent() != null) {
return getParent().generateParentGetPropertyForMethodInvocation();
}
return "null;";
}
public String generateGetPropertyForMethod() {
StringBuilder code = new StringBuilder(ReflectionLessCodeGenerator.getIndent(1))
.append(generatesGetPropertyForMethodHeader())
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(2))
.append("Object result = null;")
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(2))
.append("switch (")
.append(NAME_VAR_NAME)
.append(") {")
.append(System.lineSeparator());
//case statements for each property
for (ReflectionProperty property : getProperties()) {
String invocation = generateGetPropertyMethod(property);
if (invocation != null) {
code.append(ReflectionLessCodeGenerator.getIndent(3))
.append("case \"")
.append(property.getPropertyName())
.append("\" : ")
.append(System.lineSeparator());
code.append(ReflectionLessCodeGenerator.getIndent(4))
.append(invocation)
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(4))
.append("break;")
.append(System.lineSeparator())
;
} else {
code.append(ReflectionLessCodeGenerator.getIndent(3))
.append("//no get" + IntrospectionUtils.capitalize(property.getPropertyName())+ " method found on this class")
.append(System.lineSeparator())
;
}
}
//end switch statement
code.append(ReflectionLessCodeGenerator.getIndent(2))
.append("}")
.append(System.lineSeparator());
//invoke parent or return null
code.append(ReflectionLessCodeGenerator.getIndent(2))
.append("if (result == null) {")
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(3))
.append("result = ")
.append(getGetPropertyForExitStatement())
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(2))
.append("}")
.append(System.lineSeparator())
;
//we have a generic getProperty(String, String) method, invoke it
if (getGenericGetPropertyMethod() != null) {
ReflectionProperty p = new ReflectionProperty(
clazz.getName(),
"property",
String.class,
null,
getGenericGetPropertyMethod()
);
code.append(ReflectionLessCodeGenerator.getIndent(2))
.append("if (result == null) {")
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(3))
.append(generateGetPropertyMethod(p))
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(2))
.append("}")
.append(System.lineSeparator());
}
code.append(ReflectionLessCodeGenerator.getIndent(2))
.append("return result;")
.append(System.lineSeparator())
.append(ReflectionLessCodeGenerator.getIndent(1))
.append("}")
.append(System.lineSeparator());
return code.toString();
}
@Override
public int compareTo(SetPropertyClass o) {
return clazz.getName().compareTo(o.clazz.getName());
}
}