/*
* Copyright 2013 the original author or authors.
*
* 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.
*/
package org.grails.encoder;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Set;
/**
* Default implementation of {@link EncodingState}
*
* @author Lari Hotari
* @since 2.3
*/
public class EncodingStateImpl implements EncodingState {
public static final EncodingState UNDEFINED_ENCODING_STATE = new EncodingStateImpl((Set<Encoder>)null, null);
private final Set<Encoder> encoders;
private final EncodingState previousEncodingState;
/**
* Default constructor
*
* @param encoders
* the encoders
*/
public EncodingStateImpl(Set<Encoder> encoders, EncodingState previousEncodingState) {
this.encoders = encoders;
this.previousEncodingState = previousEncodingState;
}
public EncodingStateImpl(Encoder encoder, EncodingState previousEncodingState) {
this(Collections.singleton(encoder), previousEncodingState);
}
/*
* (non-Javadoc)
* @see
* EncodingState#getEncoders()
*/
public Set<Encoder> getEncoders() {
return encoders;
}
/*
* (non-Javadoc)
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((encoders == null) ? 0 : encoders.hashCode());
return result;
}
/*
* (non-Javadoc)
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
EncodingStateImpl other = (EncodingStateImpl)obj;
if (encoders == null) {
if (other.encoders != null && other.encoders.size() > 0)
return false;
}
else if (!encoders.equals(other.encoders))
return false;
return true;
}
public EncodingState appendEncoder(Encoder encoder) {
if(encoder==null) return this;
Set<Encoder> newEncoders;
if (encoders == null || encoders.size()==0) {
newEncoders = Collections.singleton(encoder);
} else if (encoders.size()==1 && encoders.contains(encoder)) {
return this;
} else {
newEncoders = new LinkedHashSet<Encoder>();
newEncoders.addAll(encoders);
newEncoders.add(encoder);
}
return new EncodingStateImpl(newEncoders, this);
}
@Override
public String toString() {
StringBuilder sb=new StringBuilder();
sb.append("EncodingStateImpl");
if(encoders != null && encoders.size() > 0) {
sb.append(" [encoders=");
boolean first=true;
for(Encoder encoder : encoders) {
if(!first) {
sb.append(", ");
} else {
first=false;
}
sb.append("[@");
sb.append(System.identityHashCode(encoder));
sb.append(" ");
sb.append(encoder.getCodecIdentifier().getCodecName() + " safe:" + encoder.isSafe() + " apply to safe:" + encoder.isApplyToSafelyEncoded());
sb.append("]");
}
sb.append("]");
} else {
sb.append("[no encoders]");
}
return sb.toString();
}
@Override
public EncodingState getPreviousEncodingState() {
return previousEncodingState;
}
}