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package org.glassfish.json;
import org.glassfish.json.api.BufferPool;
import javax.json.*;
import java.io.StringWriter;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.AbstractList;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* JsonArrayBuilder impl
*
* @author Jitendra Kotamraju
*/
class JsonArrayBuilderImpl implements JsonArrayBuilder {
private ArrayList<JsonValue> valueList;
private final BufferPool bufferPool;
JsonArrayBuilderImpl(BufferPool bufferPool) {
this.bufferPool = bufferPool;
}
public JsonArrayBuilder add(JsonValue value) {
validateValue(value);
addValueList(value);
return this;
}
public JsonArrayBuilder add(String value) {
validateValue(value);
addValueList(new JsonStringImpl(value));
return this;
}
public JsonArrayBuilder add(BigDecimal value) {
validateValue(value);
addValueList(JsonNumberImpl.getJsonNumber(value));
return this;
}
public JsonArrayBuilder add(BigInteger value) {
validateValue(value);
addValueList(JsonNumberImpl.getJsonNumber(value));
return this;
}
public JsonArrayBuilder add(int value) {
addValueList(JsonNumberImpl.getJsonNumber(value));
return this;
}
public JsonArrayBuilder add(long value) {
addValueList(JsonNumberImpl.getJsonNumber(value));
return this;
}
public JsonArrayBuilder add(double value) {
addValueList(JsonNumberImpl.getJsonNumber(value));
return this;
}
public JsonArrayBuilder add(boolean value) {
addValueList(value ? JsonValue.TRUE : JsonValue.FALSE);
return this;
}
public JsonArrayBuilder addNull() {
addValueList(JsonValue.NULL);
return this;
}
public JsonArrayBuilder add(JsonObjectBuilder builder) {
if (builder == null) {
throw new NullPointerException(JsonMessages.ARRBUILDER_OBJECT_BUILDER_NULL());
}
addValueList(builder.build());
return this;
}
public JsonArrayBuilder add(JsonArrayBuilder builder) {
if (builder == null) {
throw new NullPointerException(JsonMessages.ARRBUILDER_ARRAY_BUILDER_NULL());
}
addValueList(builder.build());
return this;
}
public JsonArray build() {
List<JsonValue> snapshot;
if (valueList == null) {
snapshot = Collections.emptyList();
} else {
// Should we trim to minimize storage ?
// valueList.trimToSize();
snapshot = Collections.unmodifiableList(valueList);
}
valueList = null;
return new JsonArrayImpl(snapshot, bufferPool);
}
private void addValueList(JsonValue value) {
if (valueList == null) {
valueList = new ArrayList<JsonValue>();
}
valueList.add(value);
}
private void validateValue(Object value) {
if (value == null) {
throw new NullPointerException(JsonMessages.ARRBUILDER_VALUE_NULL());
}
}
private static final class JsonArrayImpl extends AbstractList<JsonValue> implements JsonArray {
private final List<JsonValue> valueList; // Unmodifiable
private final BufferPool bufferPool;
JsonArrayImpl(List<JsonValue> valueList, BufferPool bufferPool) {
this.valueList = valueList;
this.bufferPool = bufferPool;
}
@Override
public int size() {
return valueList.size();
}
@Override
public JsonObject getJsonObject(int index) {
return (JsonObject)valueList.get(index);
}
@Override
public JsonArray getJsonArray(int index) {
return (JsonArray)valueList.get(index);
}
@Override
public JsonNumber getJsonNumber(int index) {
return (JsonNumber)valueList.get(index);
}
@Override
public JsonString getJsonString(int index) {
return (JsonString)valueList.get(index);
}
@Override
@SuppressWarnings("unchecked")
public <T extends JsonValue> List<T> getValuesAs(Class<T> clazz) {
return (List<T>)valueList;
}
@Override
public String getString(int index) {
return getJsonString(index).getString();
}
@Override
public String getString(int index, String defaultValue) {
try {
return getString(index);
} catch (Exception e) {
return defaultValue;
}
}
@Override
public int getInt(int index) {
return getJsonNumber(index).intValue();
}
@Override
public int getInt(int index, int defaultValue) {
try {
return getInt(index);
} catch (Exception e) {
return defaultValue;
}
}
@Override
public boolean getBoolean(int index) {
JsonValue jsonValue = get(index);
if (jsonValue == JsonValue.TRUE) {
return true;
} else if (jsonValue == JsonValue.FALSE) {
return false;
} else {
throw new ClassCastException();
}
}
@Override
public boolean getBoolean(int index, boolean defaultValue) {
try {
return getBoolean(index);
} catch (Exception e) {
return defaultValue;
}
}
@Override
public boolean isNull(int index) {
return valueList.get(index).equals(JsonValue.NULL);
}
@Override
public ValueType getValueType() {
return ValueType.ARRAY;
}
@Override
public JsonValue get(int index) {
return valueList.get(index);
}
@Override
public String toString() {
StringWriter sw = new StringWriter();
JsonWriter jw = new JsonWriterImpl(sw, bufferPool);
jw.write(this);
jw.close();
return sw.toString();
}
}
}