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A library for invoking native functions from java
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package jnr.ffi.util;
/*
* Copyright 2010 The Miyamoto Team
*
* 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
*
* 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.
*/
import java.util.Arrays;
/**
* Describes an annotation property.
*
* @version $Id$
*/
final class AnnotationProperty {
/**
* The property name.
*/
private final String name;
/**
* The property type.
*/
private final Class type;
/**
* The property value. This field can be mutable.
*/
private Object value;
/**
* Creates a new annotation property instance.
*
* @param name the property name.
* @param type the property type.
*/
public AnnotationProperty(String name, Class type) {
this.name = name;
this.type = type;
}
/**
* Returns the property name.
*
* @return the property name.
*/
public String getName() {
return this.name;
}
/**
* Returns the property type.
*
* @return the property type.
*/
public Class getType() {
return this.type;
}
/**
* Returns the property value.
*
* @return the property value.
*/
public Object getValue() {
return this.value;
}
/**
* Sets the property value.
*
* @param value the property value.
*/
public void setValue(Object value) {
if (value != null && !(this.type.isAssignableFrom(value.getClass())
|| (this.type == Boolean.TYPE && value.getClass() == Boolean.class)
|| (this.type == Byte.TYPE && value.getClass() == Byte.class)
|| (this.type == Character.TYPE && value.getClass() == Character.class)
|| (this.type == Double.TYPE && value.getClass() == Double.class)
|| (this.type == Float.TYPE && value.getClass() == Float.class)
|| (this.type == Integer.TYPE && value.getClass() == Integer.class)
|| (this.type == Long.TYPE && value.getClass() == Long.class)
|| (this.type == Short.TYPE && value.getClass() == Short.class))) {
throw new IllegalArgumentException("Cannot assign value of type '"
+ value.getClass().getName()
+ "' to property '"
+ this.name
+ "' of type '"
+ this.type.getName()
+ "'");
}
this.value = value;
}
/**
* {@inheritDoc}
*/
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + this.name.hashCode();
result = prime * result + this.type.hashCode();
result = prime * result + this.getValueHashCode();
return result;
}
/**
* Calculates this annotation value hash code.
*
* @return this annotation value hash code.
*/
protected int getValueHashCode() {
if (this.value == null) {
return 0;
}
if (!this.type.isArray()) {
return this.value.hashCode();
}
if (this.type == byte[].class) {
return Arrays.hashCode((byte[]) this.value);
}
if (this.type == char[].class) {
return Arrays.hashCode((char[]) this.value);
}
if (this.type == double[].class) {
return Arrays.hashCode((double[]) this.value);
}
if (this.type == float[].class) {
return Arrays.hashCode((float[]) this.value);
}
if (this.type == int[].class) {
return Arrays.hashCode((int[]) this.value);
}
if (this.type == long[].class) {
return Arrays.hashCode((long[]) this.value);
}
if (this.type == short[].class) {
return Arrays.hashCode((short[]) this.value);
}
if (this.type == boolean[].class) {
return Arrays.hashCode((boolean[]) this.value);
}
return Arrays.hashCode((Object[]) this.value);
}
/**
* {@inheritDoc}
*/
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (this.getClass() != obj.getClass()) {
return false;
}
AnnotationProperty other = (AnnotationProperty) obj;
if (this.name == null) {
if (other.getName() != null) {
return false;
}
} else if (!this.name.equals(other.getName())) {
return false;
}
if (this.type == null) {
if (other.getType() != null) {
return false;
}
} else if (!this.type.equals(other.getType())) {
return false;
}
if (this.value == null) {
if (other.getValue() != null) {
return false;
}
} else {
// Check for primitive, string, class, enum const, annotation
if (!this.type.isArray()) {
return this.value.equals(other.getValue());
}
// Check for array of string, class, enum const, annotation
if (this.value instanceof Object[] && other.getValue() instanceof Object[]) {
Arrays.equals((Object[]) this.value, (Object[]) other.getValue());
}
// Deal with array of primitives
if (this.type == byte[].class) {
return Arrays.equals((byte[]) this.value, (byte[]) other.getValue());
}
if (this.type == char[].class) {
return Arrays.equals((char[]) this.value, (char[]) other.getValue());
}
if (this.type == double[].class) {
return Arrays.equals((double[]) this.value, (double[]) other.getValue());
}
if (this.type == float[].class) {
return Arrays.equals((float[]) this.value, (float[]) other.getValue());
}
if (this.type == int[].class) {
return Arrays.equals((int[]) this.value, (int[]) other.getValue());
}
if (this.type == long[].class) {
return Arrays.equals((long[]) this.value, (long[]) other.getValue());
}
if (this.type == short[].class) {
return Arrays.equals((short[]) this.value, (short[]) other.getValue());
}
if (this.type == boolean[].class) {
return Arrays.equals((boolean[]) this.value, (boolean[]) other.getValue());
}
}
return false;
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
return "(name="
+ this.name
+ ", type="
+ (this.type.isArray() ? (this.type.getComponentType().getName() + "[]") : this.type.getName())
+ ", value="
+ this.valueToString()
+ ")";
}
/**
* Calculates the {@code toString} of the property value.
*
* @return the {@code toString} of the property value.
*/
protected String valueToString() {
if (!this.type.isArray()) {
return String.valueOf(this.value);
}
Class arrayType = this.type.getComponentType();
if (arrayType == Boolean.TYPE) {
return Arrays.toString((boolean[]) this.value);
} else if (arrayType == Byte.TYPE) {
return Arrays.toString((byte[]) this.value);
} else if (arrayType == Character.TYPE) {
return Arrays.toString((char[]) this.value);
} else if (arrayType == Double.TYPE) {
return Arrays.toString((double[]) this.value);
} else if (arrayType == Float.TYPE) {
return Arrays.toString((float[]) this.value);
} else if (arrayType == Integer.TYPE) {
return Arrays.toString((int[]) this.value);
} else if (arrayType == Long.TYPE) {
return Arrays.toString((long[]) this.value);
} else if (arrayType == Short.TYPE) {
return Arrays.toString((short[]) this.value);
}
return Arrays.toString((Object[]) this.value);
}
}