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/*
* Hibernate Validator, declare and validate application constraints
*
* License: Apache License, Version 2.0
* See the license.txt file in the root directory or .
*/
package org.hibernate.validator.internal.metadata.raw;
import static org.hibernate.validator.internal.util.CollectionHelper.newArrayList;
import static org.hibernate.validator.internal.util.CollectionHelper.newHashSet;
import java.lang.invoke.MethodHandles;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.validation.metadata.ConstraintDescriptor;
import org.hibernate.validator.internal.metadata.aggregated.CascadingMetaDataBuilder;
import org.hibernate.validator.internal.metadata.core.MetaConstraint;
import org.hibernate.validator.internal.properties.Callable;
import org.hibernate.validator.internal.util.CollectionHelper;
import org.hibernate.validator.internal.util.logging.Log;
import org.hibernate.validator.internal.util.logging.LoggerFactory;
import org.hibernate.validator.internal.util.stereotypes.Immutable;
/**
* Represents a method or constructor of a Java type and all its associated
* meta-data relevant in the context of bean validation, for instance the
* constraints at its parameters or return value.
*
* @author Gunnar Morling
* @author Guillaume Smet
*/
public class ConstrainedExecutable extends AbstractConstrainedElement {
private static final Log LOG = LoggerFactory.make( MethodHandles.lookup() );
private final Callable callable;
/**
* Constrained-related meta data for this executable's parameters.
*/
@Immutable
private final List parameterMetaData;
private final boolean hasParameterConstraints;
@Immutable
private final Set> crossParameterConstraints;
/**
* Creates a new executable meta data object for a parameter-less executable.
*
* @param source The source of meta data.
* @param callable The represented executable.
* @param returnValueConstraints Type arguments constraints, if any.
* @param typeArgumentConstraints The type argument constraints on the return value of the represented executable,
* if any.
* @param cascadingMetaDataBuilder The cascaded validation metadata for this element and its container elements.
*/
public ConstrainedExecutable(
ConfigurationSource source,
Callable callable,
Set> returnValueConstraints,
Set> typeArgumentConstraints,
CascadingMetaDataBuilder cascadingMetaDataBuilder) {
this(
source,
callable,
Collections.emptyList(),
Collections.>emptySet(),
returnValueConstraints,
typeArgumentConstraints,
cascadingMetaDataBuilder
);
}
/**
* Creates a new executable meta data object.
*
* @param source The source of meta data.
* @param callable The represented executable.
* @param parameterMetaData A list with parameter meta data. The length must correspond with the number of
* parameters of the represented executable. So this list may be empty (in case of a parameterless executable), but
* never {@code null}.
* @param crossParameterConstraints the cross parameter constraints
* @param returnValueConstraints The return value constraints of the represented executable, if any.
* @param typeArgumentConstraints The type argument constraints on the return value of the represented executable,
* if any.
* @param cascadingMetaDataBuilder The cascaded validation metadata for this element and its container elements.
*/
public ConstrainedExecutable(
ConfigurationSource source,
Callable callable,
List parameterMetaData,
Set> crossParameterConstraints,
Set> returnValueConstraints,
Set> typeArgumentConstraints,
CascadingMetaDataBuilder cascadingMetaDataBuilder) {
super(
source,
callable.getConstrainedElementKind(),
returnValueConstraints,
typeArgumentConstraints,
cascadingMetaDataBuilder
);
this.callable = callable;
if ( parameterMetaData.size() != callable.getParameterCount() ) {
throw LOG.getInvalidLengthOfParameterMetaDataListException(
callable,
callable.getParameterCount(),
parameterMetaData.size()
);
}
this.crossParameterConstraints = CollectionHelper.toImmutableSet( crossParameterConstraints );
this.parameterMetaData = CollectionHelper.toImmutableList( parameterMetaData );
this.hasParameterConstraints = hasParameterConstraints( parameterMetaData ) || !crossParameterConstraints.isEmpty();
}
/**
* Constraint meta data for the specified parameter.
*
* @param parameterIndex The index in this executable's parameter array of the parameter of
* interest.
*
* @return Meta data for the specified parameter. Will never be {@code null}.
*
* @throws IllegalArgumentException In case this executable doesn't have a parameter with the
* specified index.
*/
public ConstrainedParameter getParameterMetaData(int parameterIndex) {
if ( parameterIndex < 0 || parameterIndex > parameterMetaData.size() - 1 ) {
throw LOG.getInvalidExecutableParameterIndexException(
callable,
parameterIndex
);
}
return parameterMetaData.get( parameterIndex );
}
/**
* Returns meta data for all parameters of the represented executable.
*
* @return A list with parameter meta data. The length corresponds to the
* number of parameters of the executable represented by this meta data
* object, so an empty list may be returned (in case of a
* parameterless executable), but never {@code null}.
*/
public List getAllParameterMetaData() {
return parameterMetaData;
}
public Set> getCrossParameterConstraints() {
return crossParameterConstraints;
}
/**
* Whether the represented executable is constrained or not. This is the case if
* it has at least one constrained parameter, at least one parameter marked
* for cascaded validation, at least one cross-parameter constraint, at
* least one return value constraint or if the return value is marked for
* cascaded validation.
*
* @return {@code True} if this executable is constrained by any means,
* {@code false} otherwise.
*/
@Override
public boolean isConstrained() {
return super.isConstrained() || hasParameterConstraints;
}
/**
* Whether this executable has at least one cascaded parameter or at least one
* parameter with constraints or at least one cross-parameter constraint.
*
* @return {@code True}, if this executable is parameter-constrained by any
* means, {@code false} otherwise.
*/
public boolean hasParameterConstraints() {
return hasParameterConstraints;
}
public Callable getCallable() {
return callable;
}
@Override
public String toString() {
return "ConstrainedExecutable [executable=" + callable
+ ", parameterMetaData=" + parameterMetaData
+ ", hasParameterConstraints=" + hasParameterConstraints + "]";
}
private boolean hasParameterConstraints(List parameterMetaData) {
for ( ConstrainedParameter oneParameter : parameterMetaData ) {
if ( oneParameter.isConstrained() ) {
return true;
}
}
return false;
}
/**
* Whether this and the given other executable have the same parameter
* constraints.
*
* @param other The other executable to check.
*
* @return True if this and the other executable have the same parameter
* constraints (including cross- parameter constraints and parameter
* cascades), false otherwise.
*/
public boolean isEquallyParameterConstrained(ConstrainedExecutable other) {
if ( !getDescriptors( crossParameterConstraints ).equals( getDescriptors( other.crossParameterConstraints ) ) ) {
return false;
}
int i = 0;
for ( ConstrainedParameter parameter : parameterMetaData ) {
ConstrainedParameter otherParameter = other.getParameterMetaData( i );
// FIXME: how to deal with method overriding with type overloading of one of the parameters?
if ( !parameter.getCascadingMetaDataBuilder().equals( otherParameter.getCascadingMetaDataBuilder() )
|| !getDescriptors( parameter.getConstraints() ).equals( getDescriptors( otherParameter.getConstraints() ) ) ) {
return false;
}
i++;
}
return true;
}
/**
* Creates a new constrained executable object by merging this and the given
* other executable. Both executables must have the same location, i.e.
* represent the same executable on the same type.
*
* @param other The executable to merge.
*
* @return A merged executable.
*/
public ConstrainedExecutable merge(ConstrainedExecutable other) {
ConfigurationSource mergedSource = ConfigurationSource.max( source, other.source );
List mergedParameterMetaData = newArrayList( parameterMetaData.size() );
int i = 0;
for ( ConstrainedParameter parameter : parameterMetaData ) {
mergedParameterMetaData.add( parameter.merge( other.getParameterMetaData( i ) ) );
i++;
}
Set> mergedCrossParameterConstraints = newHashSet( crossParameterConstraints );
mergedCrossParameterConstraints.addAll( other.crossParameterConstraints );
Set> mergedReturnValueConstraints = newHashSet( constraints );
mergedReturnValueConstraints.addAll( other.constraints );
Set> mergedTypeArgumentConstraints = new HashSet<>( typeArgumentConstraints );
mergedTypeArgumentConstraints.addAll( other.typeArgumentConstraints );
CascadingMetaDataBuilder mergedCascadingMetaDataBuilder = cascadingMetaDataBuilder.merge( other.cascadingMetaDataBuilder );
return new ConstrainedExecutable(
mergedSource,
callable,
mergedParameterMetaData,
mergedCrossParameterConstraints,
mergedReturnValueConstraints,
mergedTypeArgumentConstraints,
mergedCascadingMetaDataBuilder
);
}
private Set> getDescriptors(Iterable> constraints) {
Set> descriptors = newHashSet();
for ( MetaConstraint constraint : constraints ) {
descriptors.add( constraint.getDescriptor() );
}
return descriptors;
}
@Override
public int hashCode() {
final int prime = 31;
int result = super.hashCode();
result = prime * result + callable.hashCode();
return result;
}
@Override
public boolean equals(Object obj) {
if ( this == obj ) {
return true;
}
if ( !super.equals( obj ) ) {
return false;
}
if ( getClass() != obj.getClass() ) {
return false;
}
ConstrainedExecutable other = (ConstrainedExecutable) obj;
if ( !callable.equals( other.callable ) ) {
return false;
}
return true;
}
}
